INDENTURE   dated  as  of  July  8,  1997,   between   Calpine
Corporation, a Delaware corporation (the "Company"), and The Bank of New York, a
New York banking corporation (the "Trustee").

                  Each  party  agrees as  follows  for the  benefit of the other
parties and for the equal and ratable  benefit of the holders of the Company's 8
3/4% Senior Notes Due 2007:


                                    ARTICLE I

                   DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1  Definitions.

                  "Acquired   Indebtedness"   means  Indebtedness  of  a  Person
existing at the time at which such Person  became a Subsidiary  and not incurred
in connection with, or in  contemplation  of, such Person becoming a Subsidiary.
Acquired  Indebtedness  shall be deemed to be Incurred on the date the  acquired
Person becomes a Subsidiary.

                  "Additional  Assets" means (i) any property or assets  related
to the Line of  Business  which  will be  owned  and  used by the  Company  or a
Restricted  Subsid  iary;  (ii) the  Capital  Stock of a Person  that  becomes a
Restricted  Subsidiary as a result of the  acquisition  of such Capital Stock by
the Company or another Restricted Subsidiary or (iii) Capital Stock constituting
a minority interest in any Person that at such time is a Restricted Subsidiary.

                  "Affiliate"  of any  specified  Person means any other Person,
directly or indirectly, controlling or controlled by or under direct or indirect
common control with such specified Person.  For the purposes of this definition,
"control"  when used with  respect to any  Person  means the power to direct the
management and policies of such Person, directly or indirectly,  whether through
the ownership of voting  securi ties,  by contract or  otherwise;  and the terms
"controlling" and "controlled" have meanings  correlative to the foregoing.  For
purposes  of  Sections  3.11 and 3.12  only,  "Affiliate"  shall  also  mean any
beneficial  owner of 5% or more of the total Voting  Shares (on a Fully  Diluted
Basis) of the Company or of rights or warrants to purchase  such stock  (whether
or not currently exercisable) and any Person who would be an

                                        1





Affiliate of any such  beneficial  owner pursuant to the first sentence  hereof.
For purposes of Section 3.3, "Affiliate" shall also mean any Person of which the
Company owns 5% or more of any class of Capital Stock or rights to acquire 5% or
more or any class of Capital  Stock and any Person who would be an  Affiliate of
any such Person pursuant to the first sentence hereof.

                  "Agent"  means any  Registrar,  Paying  Agent,  authenticating
agent, co-registrar or additional paying agent.

                  "Asset  Sale" means any sale,  transfer  or other  disposition
(includ ing by way of merger, consolidation or sale leaseback transactions,  but
excluding  (except  as  provided  for in the  provisions  described  in the last
paragraph  of Section  3.12(b))  those  permitted by Article IV hereof and those
permitted  by  Section  3.6  hereof) in one or a series of  transactions  by the
Company or any Re stricted  Subsidiary  to any Person  other than the Company or
any  Wholly  Owned  Subsidiary,  of (i) all or any of the  Capital  Stock of the
Company or any  Restrict ed  Subsidiary,  (ii) all or  substantially  all of the
assets of any  operating  unit,  Facility,  division  or line of business of the
Company or any  Restricted  Subsidiary or (iii) any other  property or assets or
rights to acquire property or assets of the Company or any Restricted Subsidiary
outside of the  ordinary  course of business  of the Company or such  Restricted
Subsidiary.

                  "Attributable Debt" in respect of a Sale/Leaseback Transaction
means,  as at the time of  determination,  the present value  (discounted at the
interest rate borne by the Securities,  compounded annually) of the total obliga
tions of the lessee for rental  payments  during the remaining term of the lease
included in such Sale/Leaseback Transaction (including any period for which such
lease has been extended).

                  "Average Life" means,  as of the date of  determination,  with
respect to any  Indebtedness  or  Preferred  Stock,  the  quotient  obtained  by
dividing  (i) the sum of the  products of (A) the numbers of years from the date
of determi nation to the dates of each successive scheduled principal payment of
such  Indebtedness  or scheduled  redemption or similar  payment with respect to
such In  debtedness  or  Preferred  Stock  multiplied  by (B) the amount of such
payment by (ii) the sum of all such payments.

                  "Bank Credit Agreement" means the Credit Agreement, dated
September 25, 1996, among the Company,  certain commercial lending  institutions
named  therein and The Bank of Nova Scotia,  as agent for the lenders,  as amend
ed, refinanced, renewed or extended from time to time.

                  "Board of Directors" means the Board of Directors of the Compa
ny or any authorized committee thereof.

                  "Business Day" means each day which is not a Legal Holiday.

                  "Capital   Stock"   means  any  and  all  shares,   interests,
participations or other equivalents  (however  designated) of capital stock of a
corporation  or any and all  equivalent  ownership  interests in a Person (other
than a corporation).

                  "Capitalized Lease" means, as applied to any Person, any lease
of any  property  (whether  real,  personal  or mixed)  of which the  discounted
present value of the rental  obligations of such Person as lessee, in conformity
with GAAP,  is required to be  capitalized  on the balance sheet of such Person;
the Stated Maturity thereof shall be the date of the last payment of rent or any
other  amount due under such lease prior to the first date upon which such lease
may be terminated by the lessee without payment of a penalty;  and  "Capitalized
Lease Obligations" means the rental obligations, as aforesaid, under such lease.

                  "Change  of  Control"  means  the  occurrence  of  any  of the
following  events:  (i) any "person" (as such term is used in Sections 13(d) and
14(d) of the Exchange  Act),  other than Parent or an  underwriter  engaged in a
firm  commit  ment  underwriting  on behalf of the  Company,  is or becomes  the
beneficial  owner  (as such  term is used in Rules  13d-3  and  13d-5  under the
Exchange  Act,  except that for  purposes  of this clause (i) a person  shall be
deemed to have beneficial ownership of all shares that such person has the right
to acquire,  whether  such right is  exercisable  immediately  or only after the
passage of time),  directly or indirectly,  of more than 40% of the total Voting
Shares  of the  Company;  (ii)  during  any  period  of two  consecutive  years,
individuals  who at the  beginning  of such  period  constituted  the  Board  of
Directors  (together  with any new  directors  whose  election  by the  Board of
Directors or whose nomination for election by the stockholders was approved by a
vote of 66-2/3% of the  directors  of the Company  then still in office who were
either directors at the beginning of such period or whose election or nomination
for election was  previously  so approved)  cease for any reason to constitute a
majority of the Board of Directors  then in office;  (iii) all or  substantially
all of the Company's and its Restricted  Subsidiaries'  assets are sold, leased,
exchanged or otherwise transferred to any Person or group of Per

                                        2





sons acting in concert; or (iv) the Company is liquidated or dissolved or adopts
a plan of liquidation.

                  "Change of  Control  Triggering  Event"  means (A) if a Rating
Agency  maintains  a rating of the  Securities  at the time a Change of  Control
occurs,  the  occurrence  of a Change of Control and the  occurrence of a Rating
Decline or (B) if no Rating Agency  maintains a rating of the  Securities at the
time a Change of Control occurs, the occurrence of a Change of Control.

                  "Code" means the Internal Revenue Code of 1986, as amended.

                  "Company" means the party named as such in the Indenture until
a successor  replaces it pursuant to the terms and  conditions  of the Indenture
and thereafter means the successor.

                  "Consolidated  Coverage Ratio" as of any date of determination
means the ratio of (i) the aggregate amount of EBITDA for the period of the most
recent  four  consecutive  fiscal  quarters  to (ii) the  Consolidated  Interest
Expense (excluding interest capitalized in connection with the construction of a
new Facility  which  interest is  capitalized  during the  construction  of such
Facility) for such four fiscal quarters;  provided, however, that if the Company
or any Restrict ed Subsidiary has Incurred any Indebtedness  since the beginning
of such period that remains outstanding or if the transaction giving rise to the
need  to  calculate  the  Consolidated   Coverage  Ratio  is  an  Incurrence  of
Indebtedness,  or both, both EBITDA and  Consolidated  Interest Expense for such
period shall be calculated  after giving effect on a pro forma basis to (x) such
new  Indebtedness as if such  Indebtedness had been Incurred on the first day of
such  period  and (y)  the  repayment,  redemption,  repurchase,  defeasance  or
discharge  of  any  Indebtedness  repaid,  redeemed,  repurchased,  defeased  or
discharged  with the  proceeds of such new  Indebtedness  as if such  repayment,
redemption,  repurchase,  defeasance or discharge had been made on the first day
of such period; provided, further, that if within the period during which EBITDA
or  Consolidated  Interest  Expense  is  measured,  the  Company  or  any of its
Restricted Subsidiaries shall have made any Asset Sales, (x) the EBITDA for such
period shall be reduced by an amount equal to the EBITDA (if positive)  directly
attributable  to the assets or Capital Stock which are the subject of such Asset
Sales for such  period,  or  increased  by an  amount  equal to the  EBITDA  (if
negative),   directly   attributable   thereto  for  such  period  and  (y)  the
Consolidated  Interest  Expense  for such  period  shall be reduced by an amount
equal to the Consolidated Interest Expense directly
attributable  to any  Indebtedness  for which neither Company nor any Restricted
Subsidiary  shall  continue  to be liable as a result of any such  Asset Sale or
repaid, redeemed,  defeased,  discharged or otherwise retired in connection with
or with the  proceeds  of the assets or Capital  Stock  which are the subject of
such Asset Sales for such period; and provided,  further, that if the Company or
any Restrict ed Subsidiary  shall have made any acquisition of assets or Capital
Stock  (occur ring by merger or  otherwise)  since the  beginning of such period
(including any  acquisition  of assets or Capital Stock  occurring in connection
with a transaction  causing a calculation  to be made  hereunder) the EBITDA and
Consolidated Interest Expense for such period shall be calculated,  after giving
pro forma effect  thereto  (and without  regard to clause (iv) of the proviso to
the definition of "Consolidated  Net Income"),  as if such acquisition of assets
or Capital Stock took place on the first day of such period. For all purposes of
this definition,  if the date of determination occurs prior to the completion of
the first four full fiscal quarters  following the Issue Date, then "EBITDA" and
"Consolidated  Interest Ex pense" shall be  calculated  after giving effect on a
pro forma basis to the Offering as if the Offering  occurred on the first day of
the four  full  fiscal  quarters  that  were  completed  preceding  such date of
determination.

                  "Consolidated   Current   Liabilities,"  as  of  the  date  of
determination,  means the aggregate amount of liabilities of the Company and its
Consolidated Restricted Subsidiaries which may properly be classified as current
liabilities  (including taxes accrued as estimated),  after  eliminating (i) all
inter-company items between the Company and any Consolidated Subsidiary and (ii)
all  current  maturities  of  long-term  Indebtedness,   all  as  determined  in
accordance with GAAP.

                  "Consolidated  Income Tax Expense" means,  for any period,  as
applied to the  Company,  the  provision  for local,  state,  federal or foreign
income taxes on a  Consolidated  basis for such period  determined in accordance
with GAAP.

                  "Consolidated  Interest  Expense"  means,  for any period,  as
applied to the Company, the sum of (a) the total interest expense of the Company
and its  Consolidated  Restricted  Subsidiaries for such period as determined in
accordance with GAAP,  including,  without limitation,  (i) amortization of debt
issuance  costs  or of  original  issue  discount  on any  Indebtedness  and the
interest  portion of any deferred payment  obligation,  calculated in accordance
with the effective interest method of accounting,  (ii) accrued interest,  (iii)
noncash  interest  payments,  (iv)  commissions,  discounts  and other  fees and
charges  owed  with  respect  to  letters  of  credit  and  bankers'  acceptance
financing, (v) interest actually paid by the Compa

                                        3




ny or any such  Subsidiary  under any guarantee of  Indebtedness or other obliga
tion of any other Person and (vi) net costs  associated with Interest Rate Agree
ments (including  amortization of discounts) and Currency  Agreements,  plus (b)
all but the  principal  component  of rentals in  respect of  Capitalized  Lease
Obliga tions paid, accrued, or scheduled to be paid or accrued by the Company or
its Consolidated  Restricted  Subsidiaries,  plus (c) one-third of all Operating
Lease Obligations  paid,  accrued and/or scheduled to be paid by the Company and
its Consolidated  Restricted  Subsidiaries,  plus (d) capitalized interest, plus
(e)  dividends  paid  in  respect  of  Preferred  Stock  of the  Company  or any
Restricted  Subsidiary  held by Persons other than the Company or a Wholly Owned
Subsid iary, plus (f) cash contributions to any employee stock ownership plan to
the extent such  contributions are used by such employee stock ownership plan to
pay  interest  or fees to any person  (other  than the  Company or a  Restricted
Subsidiary) in connection  with loans incurred by such employee stock  ownership
plan to pur chase Capital Stock of the Company.

                  "Consolidated  Net Income  (Loss)" means,  for any period,  as
applied to the Company,  the  Consolidated  net income (loss) of the Company and
its  Consolidated  Restricted  Subsidiaries  for  such  period,   determined  in
accordance with GAAP, adjusted by excluding (without duplication), to the extent
included in such net income (loss), the following:  (i) all extraordinary  gains
or losses;  (ii) any net  income of any Person if such  Person is not a Domestic
Subsidiary,  except that (A) the Company's  equity in the net income of any such
Person for such period shall be included in Consolidated Net Income (Loss) up to
the  aggregate  amount of cash actually  distributed  by such Person during such
period  to the  Company  or a  Restricted  Subsidiary  as a  dividend  or  other
distribution  and (B) the equity of the Company or a Restricted  Subsidiary in a
net loss of any such  Person for such period  shall be  included in  determining
Consolidated  Net  Income  (Loss);  (iii)  the  net  income  of  any  Restricted
Subsidiary to the extent that the declaration or payment of dividends or similar
distributions  by such  Restricted  Subsidiary of such income is not at the time
thereof  permitted,  directly or indi  rectly,  by operation of the terms of its
charter  or by-laws  or any  agreement,  instrument,  judgment,  decree,  order,
statute,   rule  or  governmental   regulation  applicable  to  such  Restricted
Subsidiary  or its  stockholders;  (iv) any net  income  (or loss) of any Person
combined with the Company or any of its Restricted Subsidiaries on a "pooling of
interests"  basis  attributable  to  any  period  prior  to  the  date  of  such
combination;  (v) any  gain  (but  not  loss)  realized  upon  the sale or other
disposition of any property, plant or equipment of the Company or its Restricted
Subsidiaries (including pursuant to any sale-and-leaseback arrangement)
which is not sold or otherwise  disposed of in the  ordinary  course of business
and any gain (but not loss)  realized upon the sale or other  disposition by the
Company  or any  Restricted  Subsidiary  of any  Capital  Stock  of any  Person,
provided  that  losses  shall be included on an  after-tax  basis;  and (vi) the
cumulative effect of a change in accounting principles;  and further adjusted by
subtracting  from such net income the tax liability of any parent of the Company
to the extent of payments made to such parent by the Company pursuant to any tax
sharing agreement or other arrangement for such period.

                  "Consolidated  Net Tangible  Assets" means,  as of any date of
determination,  as  applied to the  Company,  the total  amount of assets  (less
accumulated  depreciation or amortization,  allowances for doubtful receivables,
other  applicable  reserves  and other  properly  deductible  items) which would
appear on a Consolidated  balance sheet of the Company and its  Consolidated  Re
stricted  Subsidiaries,  determined on a Consolidated  basis in accordance  with
GAAP,  and  after  giving  effect to  purchase  accounting  and after  deducting
therefrom,  to the extent otherwise  included,  the amounts of: (i) Consolidated
Current Liabilities;  (ii) minority interests in Consolidated  Subsidiaries held
by Persons  other than the Company or a Restricted  Subsidiary;  (iii) excess of
cost over fair value of assets of  businesses  acquired,  as  determined in good
faith by the Board of Directors; (iv) any revaluation or other write-up in value
of assets  subsequent to December 31, 1993 as a result of a change in the method
of valuation in accordance with GAAP; (v) unamortized debt discount and expenses
and other unamortized deferred charges, goodwill, patents,  trademarks,  service
marks, trade names, copyrights, licenses, organization or developmental expenses
and other  intangible  items;  (vi) treasury stock; and (vii) any cash set apart
and held in a sinking or other  analogous  fund  established  for the purpose of
redemp tion or other  retirement of Capital Stock to the extent such  obligation
is not reflected in Consolidated Current Liabilities.

                  "Consolidated  Net Worth" means, at any date of determination,
as  applied  to the  Company,  stockholders'  equity  as set  forth  on the most
recently   available   Consolidated   balance  sheet  of  the  Company  and  its
Consolidated Re stricted  Subsidiaries (which shall be as of a date no more than
60 days prior to the date of such computation), less any amounts attributable to
Redeemable  Stock or  Exchangeable  Stock,  the cost of  treasury  stock and the
principal  amount of any promissory  notes  receivable  from the sale of Capital
Stock of the Company or any Subsidiary.

                "Consolidation" means, with respect to any Person, the consolida
tion of  accounts  of such  Person  and each of its  subsidiaries  if and to the
extent the accounts of such Person and such  subsidiaries  are  consolidated  in
accordance with GAAP. The term "Consolidated" shall have a correlative meaning.

                  "Controlled Non-Subsidiary Investment" means any Investment of
the type specified in clause (iv) of Section 3.3(a) which is made by the Company
or its Restricted Subsidiaries in an Affiliate other than a Subsidiary; provided
that (i) at the time such  Investment  is made,  no  Default or Event of Default
shall have occurred and be continuing  (or would result  therefrom);  (ii) after
giving effect to the  Investment and to the  Incurrence of any  Indebtedness  in
connection therewith on a pro forma basis, the Consolidated Coverage Ratio is at
least  1.75:1;  (iii)  after  giving  effect to the  Investment,  the  aggregate
Investment made by the Company and its Subsidiaries in Controlled Non-Subsidiary
Investments  does  not  exceed  $100,000,000;  (iv)  the  Person  in  which  the
Investment  is made is engaged  only in the  business  described in Section 3.18
including Unrelated  Businesses to the extent permitted by Section 3.18; (v) the
Company,  directly or through its Restricted  Subsidiaries is entitled to (A) in
the  case  of an  Investment  in  Capital  Stock,  receive  dividends  or  other
distributions  on its Investment at the same time as or prior to, and on a basis
pro rata with,  any other holder or holders of Capital  Stock of such Person and
(B) in the case of an Investment  other than in Capital Stock,  receive interest
thereon at a rate per annum not less than the rate on the  Securities,  and,  on
the  liquidation  or  dissolution  of such  Person,  receive  repay  ment of the
principal  thereof  prior to the payment of any  dividends or distribu  tions on
Capital  Stock  of such  Person;  (vi)  the  Company  directly  or  through  its
Restricted Subsidiaries,  either (x) controls, under an operating and management
agreement or otherwise,  the day to day  management and operation of such Person
and any Facility of the Person in which the Investment is made or (y) has signif
icant  influence  over the  management  and  operation  of such  Person  and any
Facility of such  Person in all  material  respects  (significant  influence  to
include the right to control or veto any material act or decision) in connection
with such management or operation; and (vii) any encumbrances or restrictions on
the ability of the Person in which the  Investment is made to make the payments,
distributions,  losses, advances or transfers referred to in clauses (i) through
(iii)  under  Section  3.5,  in the written  opinion of the  President  or Chief
Financial  Officer of the Company  (x) is required in order to obtain  necessary
financing,  (y) is  customary  for such  financings  and (z) applies only to the
assets of or revenues of the Person in whom the Investment is made.

                  "Currency  Agreement"  means any  foreign  exchange  contract,
currency swap agreement or other similar agreement or arrangement designed to
protect  the  Company  or any  Restricted  Subsidiary  against  fluctuations  in
currency values to or under which the Company or any Restricted  Subsidiary is a
party or a  beneficiary  on the Issue  Date or  becomes  a party or  beneficiary
thereafter.

                  "Default" means any event which is, or after notice or passage
of time or both would be, an Event of Default.

                  "defaulted  interest" means any interest on any Security which
is payable,  but is not  punctually  paid or duly  provided  for on any Interest
Payment Date.

                  "Depositary" means The Depositary Trust Company, its nominees,
and their respective  successors until a successor  Depositary shall have become
such pursuant to the applicable  provisions of this Indenture and thereafter "De
positary" shall mean or include each Person who is then a Depositary hereunder.

               "Domestic Subsidiary" means a Restricted Subsidiary that is not a
Foreign Subsidiary.

                  "EBITDA" means, for any period, as applied to the Company, the
sum of Consolidated Net Income (Loss) (but without giving effect to adjustments,
accruals,   deductions   or  entries   resulting   from   purchase   accounting,
extraordinary  losses or gains and any  gains or losses  from any Asset  Sales),
plus the following to the extent included in calculating Consolidated Net Income
(Loss): (a) Consoli dated Income Tax Expense, (b) Consolidated Interest Expense,
(c) depreciation  expense,  (d) amortization  expense and (e) all other non-cash
items  reducing  Consolidated  Net Income,  less all non-cash  items  increasing
Consolidated  Net Income,  in each case for such period;  provided  that, if the
Company has any Sub sidiary that is not a Wholly Owned Subsidiary,  EBITDA shall
be reduced (to the extent not  otherwise  reduced by GAAP) by an amount equal to
(A) the  consoli  dated net  income  (loss) of such  Subsidiary  (to the  extent
included in  Consolidated  Net Income (Loss))  multiplied by (B) the quotient of
(1) the number of shares of  outstanding  common  stock of such  Subsidiary  not
owned  on the  last  day of such  period  by the  Company  or any  Wholly  Owned
Subsidiary  of the  Company  divided  by (2)  the  total  number  of  shares  of
outstanding common stock of such Subsidiary on the last day of such period.

                  "Exchangeable  Stock"  means any  Capital  Stock  which by its
terms is  exchangeable or convertible at the option of any Person other than the
Compa ny into another security (other than Capital Stock of the Company which is
neither Exchangeable Stock nor Redeemable Stock).
                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

                  "Exchange  Securities"  means the 8 3/4% Senior Notes Due 2007
to be issued by the  Company,  and  containing  terms  identical to those of the
Initial  Securities  (except that such Exchange  Securities  (i) shall have been
issued in an exchange offer  registered  under the Securities Act and (ii) shall
have an  interest  rate of 8 3/4% per annum (9 1/4% per  annum if such  exchange
offer is not  consum  mated  before  January 5,  1997),  without  provision  for
adjustment as provided in paragraph 1 on the reverse of the Initial Securities),
that are  issued and ex  changed  for the  Initial  Securities  pursuant  to the
Registration  Rights Agreement and this Indenture or any indenture or indentures
supplemental hereto.

                  "Facility"  means  a  power  generation   facility  or  energy
producing facility, including any related fuel reserves.

                  "Foreign  Asset  Sale"  means an Asset  Sale in respect of the
Capital Stock or assets of a Foreign  Subsidiary  or a Restricted  Subsidiary of
the type de scribed in Section 936 of the Code to the extent  that the  proceeds
of such Asset Sale are received by a Person  subject in respect of such proceeds
to the tax laws of a jurisdiction other than the United States of America or any
State thereof or the District of Columbia.

                  "Foreign  Subsidiary"  means a Restricted  Subsidiary  that is
incorpo  rated in a  jurisdiction  other than the United  States of America or a
State thereof or the District of Columbia.

                  "Fully  Diluted  Basis"  means  after  giving  effect  to  the
exercise of any  outstanding  options,  warrants  or rights to  purchase  Voting
Shares and the  conversion  or exchange of any  securities  convertible  into or
exchangeable for Voting Shares.

                  "GAAP" means generally accepted  accounting  principles in the
United  States of America as in effect and, to the extent  optional,  adopted by
the  Company  on  the  Issue  Date,  consistently  applied,  including,  without
limitation, those set forth in the opinions and pronouncements of the Accounting
Principles Board of the American  Institute of Certified Public  Accountants and
statements and pronouncements of the Financial Accounting Standards Board.

                  "guarantee" means, as applied to any obligation, contingent or
otherwise, of any Person, (i) a guarantee, direct or indirect, in any manner, of
any part or all of such  obligation  (other than by  endorsement  of  negotiable
instruments for collection in the ordinary course of business) and (ii) an agree
ment, direct or indirect, contingent or otherwise, the practical effect of which
is to insure in any way the payment or performance (or payment of damages in the
event of  nonperformance)  of any part or all of such obligation,  including the
payment of amounts drawn down under letters of credit.

                  "Holder" or "Securityholder"  means the Person in whose name a
Security is registered on the Registrar's books.

                  "Incur" means, as applied to any obligation, to create, incur,
issue,  assume,  guarantee or in any other manner become liable with respect to,
contin gently or otherwise,  such obligation,  and "Incurred,"  "Incurrence" and
"Incur ring" shall each have a correlative meaning; provided,  however, that any
Indebt  edness or Capital  Stock of a Person  existing  at the time such  Person
becomes (after the Issue Date) a Subsidiary  (whether by merger,  consolidation,
acquisition or otherwise)  shall be deemed to be Incurred by such  Subsidiary at
the time it becomes a Subsidiary;  and provided,  further,  that any  amendment,
modification  or waiver  of any  provision  of any  document  pursuant  to which
Indebtedness was previously  Incurred shall not be deemed to be an Incurrence of
Indebtedness as long as (i) such amendment,  modification or waiver does not (A)
increase the principal or premium  thereof or interest rate thereon,  (B) change
to an earlier date the Stated  Maturity  thereof or the date of any scheduled or
required principal payment thereon or the time or circumstances under which such
Indebtedness may or shall be redeemed, (C) if such Indebtedness is contractually
subordinated  in right of payment to the  Securities,  modify or affect,  in any
manner  adverse to the Holders,  such  subordination,  (D) if the Company is the
obligor thereon,  provide that a Restricted  Subsidiary shall be an obligor, (E)
if such Indebtedness is Non- Recourse Debt, cause such Indebtedness to no longer
constitute  Non-Recourse  Debt or (F)  violate,  or cause  the  Indebtedness  to
violate, the provisions of Sections 3.5 or 3.7 and (ii) such Indebtedness would,
after giving effect to such  amendment,  modification or waiver as if it were an
Incurrence,  comply with clause (i) of the first  proviso to the  definition  of
"Refinancing Indebtedness."

                  "Indebtedness" of any Person means, without  duplication,  (i)
the  principal  of and  premium  (if any such  premium is then due and owing) in
respect  of  (A)  indebtedness  of  such  Person  for  money  borrowed  and  (B)
indebtedness
evidenced  by notes,  debentures,  bonds or other  similar  instruments  for the
payment of which such  Person is  responsible  or liable;  (ii) all  Capitalized
Lease Obligations of such Person;  (iii) all obligations of such Person Incurred
as the deferred purchase price of property,  all conditional sale obligations of
such  Person  and all  obligations  of such  Person  under any  title  retention
agreement;  (iv) all  obligations  of such Person for the  reimbursement  of any
obligor  on  any  letter  of  credit,  banker's  acceptance  or  similar  credit
transaction  (other than  obligations with respect to letters of credit securing
obligations  (other  than  obligations  described  in (i) through  (iii)  above)
entered  into in the  ordinary  course of busi ness of such Person to the extent
such  letters of credit are not drawn upon or, if and to the extent  drawn upon,
such  drawing is  reimbursed  no later  than the tenth  Business  Day  following
receipt by such Person of a demand for  reimbursement  following  payment on the
letter of credit);  (v) Redeemable  Stock of such Person and, in the case of any
Subsidiary, any other Preferred Stock, in either case val ued at, in the case of
Redeemable  Stock,  the greater of its  voluntary or involun tary maximum  fixed
repurchase  price  exclusive of accrued and unpaid  dividends or, in the case of
Preferred  Stock  that  is not  Redeemable  Stock,  its  liquidation  preference
exclusive  of accrued and unpaid  dividends;  (vi)  contractual  obligations  to
repurchase goods sold or distributed; (vii) all obligations of such Person in re
spect  of  Interest  Rate  Agreements  and  Currency   Agreements;   (viii)  all
obligations  of the type  referred  to in  clauses  (i)  through  (vii) of other
Persons and all divi dends of other Persons for the payment of which,  in either
case, such Person is responsible or liable, directly or indirectly,  as obligor,
guarantor  or  otherwise,  including  by  means of any  guarantee;  and (ix) all
obligations  of the type  referred  to in clauses  (i)  through  (viii) of other
Persons secured by any Lien on any prop erty or asset of such Person (whether or
not such  obligation is assumed by such Person),  the amount of such  obligation
being  deemed to be the  lesser of the value of such  property  or assets or the
amount of the obligation so secured; provided,  however, that Indebtedness shall
not include trade accounts  payable  arising in the ordinary course of business.
For purposes  hereof,  the "maximum  fixed repur chase price" of any  Redeemable
Stock  which  does not have a fixed  repurchase  price  shall be  calculated  in
accordance with the terms of such Redeemable  Stock as if such Redeemable  Stock
were  purchased  on any  date on which  Indebtedness  shall  be  required  to be
determined  pursuant  to this  Indenture,  and if such price is based  upon,  or
measured by, the fair market value of such  Redeemable  Stock,  such fair market
value to be determined  in good faith by the Board of  Directors.  The amount of
Indebtedness  of any Person at any date shall be, with respect to  unconditional
obligations,  the  outstanding  balance at such date of all such obliga tions as
described  above and,  with respect to any  contingent  obligations  (other than
pursuant to clause (vi) above,  which shall be included to the extent  reflected
on the balance sheet of such Person in accordance  with GAAP) at such date,  the
maximum liability determined by such Person's board of directors, in good faith,
as, in light of the facts and  circumstances  existing  at the time,  reasonably
likely to be Incurred upon the occurrence of the contingency giving rise to such
obliga tion.

                  "Indenture"  means this  Indenture as amended or  supplemented
from time to time in accordance with the applicable provisions hereunder.

                  "Initial  Securities"  means the 8 3/4% Senior  Notes Due 2007
issued by the Company  under this  Indenture  or pursuant  to any  indenture  or
indentures supplemental hereto.

                  "Institutional  Accredited Investor" means an institution that
is an "accredited investor" as that term is defined in Rule 501(a)(1),  (2), (3)
or (7) under the Securities Act.

                  "Interest  Payment  Date"  means  the  stated  maturity  of an
install ment of interest on the Securities.

                  "Interest Rate  Agreement"  means any interest rate protection
agreement,  interest  rate future  agreement,  interest  rate option  agreement,
interest rate swap agreement,  interest rate cap agreement, interest rate collar
agreement,   interest  rate  hedge  agreement  or  other  similar  agreement  or
arrangement  designed to protect  against  fluctuations  in interest rates to or
under  which the  Company or any of its  Restricted  Subsidiaries  is a party or
beneficiary on the Issue Date or becomes a party or beneficiary thereunder.

                  "Investment"  means, with respect to any Person, any direct or
indirect advance,  loan or other extension of credit or capital  contribution to
(by means of any transfer of cash or other property to others or any payment for
property or services for the account or use of others),  or any other investment
in any other  Person,  or any  purchase  or  acquisition  by such  Person of any
Capital Stock, bonds, notes,  debentures or other securities or assets issued or
owned by any other Person (whether by merger, consolidation,  amalgamation, sale
of assets  or  otherwise).  For  purposes  of the  definition  of  "Unrestricted
Subsidiary" and the provisions set forth in Section 3.3, (i) "Investment"  shall
include the portion  (proportionate  to the  Company's  equity  interest in such
Subsidiary)  of the  fair  market  value  of the net  assets  of any  Restricted
Subsidiary  at the  time  that  such  Restricted  Subsidiary  is  designated  an
Unrestricted Subsidiary and shall exclude
the fair market value of the net assets of any  Unrestricted  Subsidiary  at the
time that such Unrestricted Subsidiary is designated a Restricted Subsidiary and
(ii) any property  transferred to or from an  Unrestricted  Subsidiary  shall be
valued at its fair market  value at the time of such  transfer,  in each case as
determined by the Board of Directors in good faith.  For purposes of determining
the aggregate  amount of Investments in Controlled  Non-Subsidiary  Investments,
the amount of such  Investments  shall be reduced by an amount  equal to the net
payments of  interest  on  Indebtedness,  dividends,  repayments  of interest on
Indebtedness, divi dends, repayments of loans or advances, or other transfers of
assets, in each case to the Company or any Restricted Subsidiary from any Person
in whom a Con trolled Non-Subsidiary  Investment has been made, not to exceed in
the case of any Controlled  Non-Subsidiary  Investment the amount of Investments
previously made by the Company or any Restricted Subsidiary in such Person.

                  "Investment  Grade" means,  with respect to the Securities,  a
rating of Baa3 or higher by Moody's  together with a rating of BBB- or higher by
S&P, provided that neither of such entities shall have announced or informed the
Company  that  it is  reviewing  the  rating  of  the  Securities  in  light  of
downgrading the rating thereof.

                  "Issue  Date" means the date on which the  Initial  Securities
are originally issued under this Indenture.

                  "Lien" means any  mortgage,  lien,  pledge,  charge,  or other
security  interest or encumbrance of any kind (including any conditional sale or
other title retention agreement and any lease in the nature thereof).

                  "Line  of   Business"   means  the   ownership,   acquisition,
development, construction, improvement and operation of Facilities.

                  "Moody's" means Moody's Investors Service, Inc. and its succes
sors.

                  "Net  Available  Cash" means,  with respect to any Asset Sale,
the cash or cash equivalent  payments received by the Company or a Subsidiary in
connection  with such Asset Sale (including any cash received by way of deferred
payment of principal pursuant to a note or installment  receivable or otherwise,
but only as or when received and also  including the proceeds of other  property
received when converted to cash or cash  equivalents) net of the sum of, without
duplication,  (i) all  reasonable  legal,  title  and  recording  tax  expenses,
reasonable
commissions,  and other reasonable fees and expenses  incurred directly relating
to such Asset Sale, (ii) all local, state, federal and foreign taxes required to
be paid or  accrued  as a  liability  by the  Company  or any of its  Restricted
Subsidiaries  as a consequence of such Asset Sale,  (iii) payments made to repay
Indebtedness  which is  secured  by any  assets  subject  to such  Asset Sale in
accordance  with the terms of any Lien upon or other  security  agreement of any
kind with respect to such assets,  or which must by its terms,  or by applicable
law,  be  repaid  out  of the  proceeds  from  such  Asset  Sale  and  (iv)  all
distributions  required by any contract entered into other than in contemplation
of such Asset Sale to be paid to any holder of a  minority  equity  interest  in
such  Restricted  Subsidiary  as a result of such  Asset  Sale,  so long as such
distributions  do not exceed such minority  holder's pro rata portion  (based on
such  minority  holder's  proportionate  equity  interest)  of the  cash or cash
equivalent  payments  described  above,  net of the amounts set forth in clauses
(i)-(iii) above.

                  "Net Cash  Proceeds"  means,  with  respect to any issuance or
sale of Capital  Stock by any Person,  the cash  proceeds to such Person of such
issuance or sale net of attorneys'  fees,  accountants'  fees,  underwriters' or
placement agents' fees, discounts or commissions and brokerage,  consultancy and
other fees actually  incurred by such Person in connection with such issuance or
sale and net of taxes paid or payable by such Person as a result thereof.

                  "Non-Convertible  Capital  Stock"  means,  with respect to any
corporation, any Capital Stock of such corporation which is not convertible into
another security other than  non-convertible  common stock of such  corporation;
provided,  however,  that  Non-Convertible  Capital  Stock shall not include any
Redeemable Stock or Exchangeable Stock.

                  "Non-U.S. Person" means a person who is not a U.S. Person as
that term is defined in Regulation S.

                  "Non-Recourse  Debt" means  Indebtedness of the Company or any
Restricted  Subsidiary  that is  Incurred  to  acquire,  construct  or develop a
Facility  provided that such  Indebtedness is without recourse to the Company or
any  Re  stricted  Subsidiary  or to  any  assets  of the  Company  or any  such
Restricted  Subsidiary other than such Facility and the income from and proceeds
of such Facility.

                  "Offering"   means  the  offering  and  sale  of  the  Initial
Securities  pursuant  to the  Purchase  Agreement  dated  July 1, 1997 among the
Company, Credit Suisse First Boston Corporation, Morgan Stanley & Co. 
Incorporated, Salomon Brothers Inc, Scotia Capital Markets (USA) Inc., 
CIBC Wood Gundy Securities Corp. and BancAmerica Securities, Inc.

                "Officer" means the Chairman, the President, any Vice President,
the Chief Operating Officer, the Chief Financial Officer, the Treasurer, the
Secretary, any Assistant Treasurer, any Assistant Secretary or the Controller of
the Company.

                  "Officers'  Certificate"  means a  certificate  signed  by two
Officers,  one of whom must be the President,  the Treasurer or a Vice President
of the Company.  Each Officers'  Certificate  (other than certificates  provided
pursuant to TIA Section 314(a)(4)) shall include the statements  provided for in
TIA Section 314(e).

                  "Operating  Lease  Obligations"  means any  obligation  of the
Compa ny and its Restricted  Subsidiaries  on a  Consolidated  basis incurred or
assumed  under or in  connection  with any  lease of real or  personal  property
which,  in accordance  with GAAP, is not required to be classified and accounted
for as a capital lease.

                  "Opinion  of  Counsel"  means a  written  opinion  from  legal
counsel who is acceptable to the Trustee. The counsel, if so acceptable,  may be
an employee of or counsel to the Company or the  Trustee.  Each such  Opinion of
Counsel shall include the statements provided for in TIA Section 314(e).

                  "Person" means any individual, corporation, partnership, joint
venture,  association,  joint-stock company, trust, unincorporated organization,
government or any agency or political subdivision thereof or any other entity.

                  "Preferred  Stock",  as  applied to the  Capital  Stock of any
corpora tion, means Capital Stock of any class or classes  (however  designated)
which is preferred as to the payment of dividends,  or as to the distribution of
assets upon any voluntary or  involuntary  liquidation  or  dissolution  of such
corporation,   over  shares  of  Capital  Stock  of  any  other  class  of  such
corporation.

             "Principal" of a Security means the principal of the Security plus,
if applicable, the premium on the Security.

                  "Private  Placement  Legend" means the legend set forth on the
Initial Securities in the form set forth in Section 2.1(c).
                  "Public Equity Offering" means an underwritten  primary public
offering  of  equity   securities  of  the  Company  pursuant  to  an  effective
registration statement under the Securities Act.

                  "PUHCA" means the Public Utility Holding Company Act of
1935, as amended.

                  "PURPA" means the Public Utility Regulatory Policies Act of
1978, as amended.

                  "QIB" means a "qualified  institutional buyer" as that term is
defined in Rule 144A.

                  "Rating Agencies" is defined to mean S&P and Moody's.

                  "Rating  Category" is defined to mean (i) with respect to S&P,
any of the  following  categories:  AAA, AA, A, BBB, BB, B, CCC, CC, C and D (or
equivalent  successor  categories) and (ii) with respect to Moody's,  any of the
following  categories:  Aaa, Aa, A, Baa, Ba, B, Caa, Ca, C and D (or  equivalent
successor  categories).  In determining whether the rating of the Securities has
decreased by one or more gradations,  gradations within Rating Categories (+ and
- - for S&P;  1, 2 and 3 for  Moody's)  shall be taken into  account  (e.g.,  with
respect to S&P, a decline in a rating from BB+ to BB, as well as from BB- to B+,
will constitute a decrease of one gradation).

                  "Rating  Decline" is defined to mean the  occurrence of (i) or
(ii) below on, or within 90 days after,  the earliest of (A) the Company  having
become  aware  that a Change of  Control  has  occurred,  (B) the date of public
notice of the occurrence of a Change of Control or (C) the date of public notice
of the  intention by Parent or the Company to approve,  recommend or enter into,
any  transaction  which,  if  consummated,  would  result in a Change of Control
(which period shall be extended so long as the rating of the Securities is under
publicly  announced  consideration or possible downgrade by either of the Rating
Agencies),  (i) a decrease  of the  rating of the  Securities  by either  Rating
Agency  by one or more  rating  gradations  or (ii) the  Company  shall  fail to
promptly  advise the Rating  Agencies,  in writing,  of such  occurrence  or any
subsequent  material  developments  or  shall  fail to use its best  efforts  to
obtain,  from  at  least  one  Rating  Agency,  a  written,  publicly  announced
affirmation of its rating of the Securities, stating that it is not downgrading,
and is not considering downgrading, the Securities.
                  "Redeemable  Stock" means any class or series of Capital Stock
of any Person that (a) by its terms,  by the terms of any security into which it
is  convertible  or  exchangeable  or otherwise  is, or upon the happening of an
event or passage of time would be, required to be redeemed (in whole or in part)
on or prior to the first  anniversary of the Stated  Maturity of the Securities,
(b) is re deemable  at the option of the holder  thereof at any time on or prior
to the first anniversary of the Stated Maturity of the Securities (other than on
a Change of Control or Asset Sale, provided that such Change of Control or Asset
Sale shall not yet have occurred) or (c) is convertible into or exchangeable for
Capital Stock  referred to in clause (a) or clause (b) above or debt  securities
at any  time  prior to the  first  anniversary  of the  Stated  Maturity  of the
Securities.

                  "Refinancing  Indebtedness"  means  Indebtedness that refunds,
refinances,  replaces,  renews,  repays or extends  (including  pursuant  to any
defeasance or discharge mechanism) (collectively, "refinances," and "refinanced"
shall have a correlative  meaning) any Indebtedness of the Company or a Restrict
ed  Subsidiary  existing on the Issue Date or Incurred  in  compliance  with the
Indenture (including Indebtedness of the Company that refinances Indebtedness of
any Restricted  Subsidiary and  Indebtedness  of any Restricted  Subsidiary that
refi  nances   Indebtedness   of  another   Restricted   Subsidiary)   including
Indebtedness that refinances Refinancing Indebtedness;  provided,  however, that
(i) if the Indebted ness being refinanced is contractually subordinated in right
of  payment  to  the   Securities,   the  Refinancing   Indebtedness   shall  be
contractually subordinated in right of payment to the Securities to at least the
same extent as the Indebtedness being refinanced, (ii) if the Indebtedness being
refinanced  is  Non-Recourse  Debt,  such  Refinancing   Indebtedness  shall  be
Non-Recourse  Debt,  (iii) the  Refinancing  Indebtedness is scheduled to mature
either (a) no earlier than the  Indebtedness  being  refinanced or (b) after the
Stated Maturity of the  Securities,  (iv) the Refi nancing  Indebtedness  has an
Average  Life at the time such  Refinancing  Indebted  ness is Incurred  that is
equal to or greater than the Average Life of the Indebt edness being  refinanced
and (v) such Refinancing Indebtedness is in an aggregate principal amount (or if
issued with original issue discount,  an aggregate issue price) that is equal to
or less than the aggregate  principal  amount (or if issued with original  issue
discount,  the  aggregate  accreted  value)  then  outstanding  (plus  fees  and
expenses,  including any premium,  swap breakage and defeasance costs) under the
Indebtedness  being  refinanced;   and  provided,   further,   that  Refinancing
Indebtedness  shall not include (x)  Indebtedness of a Subsidiary of the Company
that refinances  Indebtedness of the Company or (y)  Indebtedness of the Company
or a Restricted  Subsidiary  that  refinances  Indebtedness  of an  Unrestricted
Subsid iary.
                  "Registration Rights Agreement" means the Registration Rights
Agreement, dated as of July 1, 1997, by and among the Company, Credit Suisse
First Boston Corporation, Morgan Stanley & Co. Incorporated,  Salomon
Brothers Inc, Scotia Capital Markets (USA) Inc., CIBC Wood Gundy Securities
Corp. and BancAmerica Securities, Inc.

                  "Registration  Statement" means the Registration  Statement as
defined and described in the Registration Rights Agreement.

                  "Regulation S" means Regulation S under the Securities Act.

                  "Related  Assets"  means  electric  power plants that,  on the
Issue Date,  produce  electricity  solely by  utilizing  steam from steam fields
owned and operated by a Restricted  Subsidiary that is a Wholly Owned Subsidiary
on the Issue Date.

                  "Related  Asset  Indebtedness"  means  Non-Recourse  Debt of a
Restricted  Subsidiary that is a Wholly Owned  Subsidiary on the Issue Date, the
proceeds of which are used by such  Restricted  Subsidiary  to finance the acqui
sition of Related Assets by such Restricted Subsidiary;  provided, however, that
(i)  such  Related  Asset  Indebtedness  is  Incurred  contemporaneously  with a
Refinanc ing of all of the Non-Recourse Debt of such Restricted  Subsidiary then
outstand ing and (ii) the principal  amount of such Related  Asset  Indebtedness
shall not  exceed the  purchase  price of the  Related  Assets  plus  reasonable
out-of-pocket  transaction  costs and expenses of the Company and its Restricted
Subsidiaries  required to acquire,  or finance the  acquisition of, such Related
Assets.

                  "Restricted  Subsidiary"  means any  Subsidiary of the Company
that is not designated an Unrestricted Subsidiary by the Board of Directors.

                  "Rule 144A" means Rule 144A under the Securities Act.

                 "S&P" means Standard and Poor's Corporation and its successors.

                  "Sale/Leaseback  Transaction" means an arrangement relating to
property  now owned or  hereafter  acquired  whereby the Company or a Subsidiary
transfers  such property to a Person and leases it back from such Person,  other
than  leases for a term of not more than 36 months or between  the Company and a
Wholly Owned Subsidiary or between Wholly Owned Subsidiaries.

                  "SEC" means the Securities and Exchange Commission.

                  "Securities"  means the Initial  Securities  and the  Exchange
Securi ties that are issued  under and  pursuant to the terms of this  Indenture
and any indenture or indentures  supplemental hereto, as amended or supplemented
from  time to  time.  For  purposes  of this  Indenture  and  any  indenture  or
indentures  supplemental  hereto, all Initial Securities and Exchange Securities
shall be treated  as a single  class and shall  vote  together  as one series of
Securities under this Indenture.

                  "Securities  Act" means the Securities Act of 1933, as amended
from time to time.

                  "Senior Indebtedness" means (i) all obligations  consisting of
the principal of and premium, if any, and accrued and unpaid interest (including
interest  accruing on or after the filing of any petition in  bankruptcy  or for
reorganization  relating to the Company whether or not  post-filing  interest is
allowed in such proceeding), whether existing on the Issue Date or thereafter In
curred, in respect of (A) Indebtedness of the Company for money borrowed and (B)
Indebtedness evidenced by notes, debentures, bonds or other similar instru ments
for the  payment  of which  the  Company  is  responsible  or  liable;  (ii) all
Capitalized Lease Obligations of the Company; (iii) all obligations of the Compa
ny (A) for the  reimbursement  of any obligor on any letter of credit,  banker's
acceptance or similar credit transaction, (B) under Interest Rate Agreements and
Currency  Agreements  entered  into in respect of any  obligations  described in
clauses (i) and (ii) or (C) issued or assumed as the deferred  purchase price of
property,   and  all  conditional  sale  obligations  of  the  Company  and  all
obligations  of the  Company  under  any  title  retention  agreement;  (iv) all
guarantees  of the Company with respect to  obligations  of other persons of the
type  referred to in clauses  (ii) and (iii) and with  respect to the payment of
dividends of other Persons; and (v) all obligations of the Company consisting of
modifications,   renewals,  extensions,   replacements  and  refundings  of  any
obligations  described  in clauses  (i),  (ii),  (iii) or (iv);  unless,  in the
instrument  creating  or  evidencing  the same or  pursuant to which the same is
outstanding,  it is provided that such  obligations are subordinated in right of
payment  to the  Securities,  or any other  Indebtedness  or  obligation  of the
Company;  provided,  however,  that Senior  Indebtedness  shall not be deemed to
include (1) any obligation of the Company to any  Subsidiary,  (2) any liability
for Federal, state, local or other taxes or (3) any
accounts  payable or other liability to trade creditors  arising in the ordinary
course of business (including guarantees thereof or instruments  evidencing such
liabili ties).

                  "Significant  Subsidiary"  means any Subsidiary (other than an
Unrestricted Subsidiary) that would be a "Significant Subsidiary" of the Company
within the meaning of Rule 1-02 under Regulations S-X promulgated by the SEC.

                  "Stated  Maturity"  means,  with respect to any security,  the
date specified in such security as the fixed date on which the principal of such
security is due and  payable,  including  pursuant to any  mandatory  redemption
provision  (but  excluding  any provision  providing for the  repurchase of such
security  at  the  option  of the  holder  thereof  upon  the  happening  of any
contingency).

                  "Subordinated  Indebtedness"  means  any  Indebtedness  of the
Company (whether  outstanding on the Issue Date or thereafter Incurred) which is
contractually  subordinated  or junior in right of payment to the  Securities or
any other Indebtedness of the Company.

                  "Subsidiary" means, as applied to any Person, any corporation,
limited or general partnership,  trust,  association or other business entity of
which an aggregate of at least a majority of the outstanding Voting Shares or an
equiva  lent  controlling  interest  therein,  of such  Person  is, at the time,
directly or indirectly,  owned by such Person and/or one or more Subsidiaries of
such Person.

                    "TIA" means the Trust  Indenture  Act of 1939 (15 U.S.  Code
Section 77aaa-77bbbb) as in effect on the date first above written.

                  "Trustee"  means  the  party  named  as  such  above  until  a
successor replaces it and thereafter means the successor.

                  "Trust  Officer" means any officer of the Trustee  assigned by
the Trustee to administer  its corporate  trust matters or to whom any corporate
trust matter is referred because of that officer's  knowledge of and familiarity
with the particular subject.

                  "Uniform   Commercial   Code"  means  the  New  York   Uniform
Commercial Code as in effect from time to time.

                  "Unrelated Business" means any business other than the Line of
Business.

                  "Unrestricted Subsidiary" means (i) any Subsidiary that at the
time of  determination  shall be  designated an  Unrestricted  Subsidiary by the
Board of Directors in the manner  provided  below and (ii) any  subsidiary of an
Unrestricted  Subsidiary.  The Board of Directors may  designate any  Subsidiary
(including any newly acquired or newly formed  Subsidiary) to be an Unrestricted
Subsidiary  unless such  Subsidiary  owns any Capital Stock of, or owns or holds
any Lien on any property of, the Company or any other  Subsidiary  that is not a
Subsidiary of the Subsidiary to be so designated;  provided, that either (A) the
Subsidiary to be so designated has total assets of $1,000 or less or (B) if such
Subsidiary  has assets  greater  than  $1,000,  that such  designation  would be
permitted  pursuant to Section  3.3. The Board of Directors  may  designate  any
Unrestricted Subsidiary to be a Restricted Subsidiary of the Company;  provided,
however,  that imme diately  after  giving  effect to such  designation  (x) the
Company could Incur $1.00 of additional  Indebtedness pursuant to Section 3.4(a)
and (y) no Default or Event of Default  shall have  occurred and be  continuing.
Any such designation by the Board of Directors shall be evidenced to the Trustee
by promptly filing with the Trustee a copy of the board resolution giving effect
to  such  designation  and  an  Officers'   Certificate   certifying  that  such
designation complied with the foregoing provisions;  provided, however, that the
failure to so file such resolution and/or Officers' Certificate with the Trustee
shall not impair or affect the validity of such designation.

                  "U.S.  Government  Obligations"  means securities that are (i)
direct  obligations of the United States of America for the payment of which its
full faith and credit is pledged or (ii)  obligations of a Person  controlled or
supervised by and acting as an agency or instrumentality of the United States of
America the payment of which is  unconditionally  guaranteed as a full faith and
credit obliga tion by the United States of America,  which, in either case under
clauses (i) or (ii) are not callable or redeemable before the maturity thereof.

                  "Voting  Shares," with respect to any  corporation,  means the
Capital Stock having the general  voting power under ordinary  circumstances  to
elect at least a majority of the board of directors  (irrespective of whether or
not at the time  stock of any other  class or  classes  shall have or might have
voting power by reason of the happening of any contingency).

                  "Wholly Owned  Subsidiary"  means a Subsidiary  (other than an
Unrestricted  Subsidiary)  all the Capital Stock of which (other than directors'
qualifying shares) is owned by the Company or another Wholly Owned Subsid iary.

                  "Working  Capital Credit  Agreement"  means the Line of Credit
Note, dated as of June 4, 1993, between the Company and The Bank of Califor nia,
N.A., as amended, refinanced, renewed or extended from time to time.

SECTION 1.2 Other Definitions.

                            Term Defined in Section

"Application Period"..................................................      3.12
"Asset Sale Offer"....................................................      3.12
"Asset Sale Offer Amount".............................................      3.12
"Asset Sale Purchase Date"............................................      3.12
"Bankruptcy Law"......................................................       5.1
"Change of Control Offer".............................................       3.8
"Change of Control Purchase Date".....................................       3.8
"Custodian"...........................................................       5.1
"Event of Default"....................................................       5.1
"Global Note" ........................................................    2.1(b)
"Legal Holiday".......................................................      10.7
"Notice of Default"...................................................       5.1
"Offer Period"........................................................      3.12
"Paying Agent"........................................................       2.3
"Registrar"...........................................................       2.3
"Restricted Payment"..................................................    3.3(a)
"Successor Corporation"................................................   4.1(i)

SECTION 1.3   Incorporation by Reference of
                    Trust Indenture Act.

                  Whenever this Indenture  refers to a provision of the TIA, the
provision is incorporated by reference in and made a part of this Indenture.

                  The  following  TIA  terms  used in this  Indenture  have  the
following meanings:

                  "Commission" means the SEC;

                  "indenture securities" means the Securities;

                  "indenture security holder" means a Holder or Securityholder;

                  "indenture to be qualified" means this Indenture;

           "indenture trustee" or "institutional trustee" means the Trustee; and

                  "obligor" on the indenture securities means the Company.

                  All other terms used in this Indenture that are defined by the
TIA,  defined by TIA  reference to another  statute or defined by SEC rule under
the TIA have the meanings assigned to them.

SECTION 1.4 Rules of Construction.

                  Unless the context otherwise requires:

                           (a)  a term has the meaning assigned to it;

                           (b) generally accepted accounting  principles" means,
         and any accounting term not otherwise  defined has the meaning assigned
         to it and shall be construed in accordance with, GAAP;

                           (c)  "or" is not exclusive;

                       (d)  words in the singular include the plural, and in the
         plural include the singular;

                    (e)  provisions apply to successive events and transactions;

                           (f)  "including" means including, without limitation;

                       (g)  unsecured debt shall not be deemed to be subordinate
     or junior to secured debt merely by virtue of its nature as unsecured debt;

                        (h)  the principal amount of any non-interest bearing or
         other  discount  security  at any date  shall be the  principal  amount
         thereof that would be shown on a balance sheet of the issuer dated such
         date  pre  pared  in  accordance  with  generally  accepted  accounting
         principles  and accretion of principal on such security shall be deemed
         to be the Incurrence of Indebtedness; and

                           (i) the  principal  amount (if any) of any  Preferred
         Stock  shall  be the  greatest  of  (i)  the  stated  value,  (ii)  the
         redemption price or (iii) the liquidation  preference of such Preferred
         Stock.


                                   ARTICLE II

                                 THE SECURITIES

SECTION 2.1 Form and Dating.

                    (a)  The Initial Securities and the Trustee's certificate of
authentication  shall be  substantially in the form of Exhibit A annexed hereto,
which is part of this  Indenture.  The  Exchange  Securities  and the  Trustee's
certificate of  authorization  shall be  substantially  in the form of Exhibit B
annexed  hereto,  which  is part of this  Indenture.  The  Securities  may  have
notations,  legends or  endorsements  required by law,  stock  exchange  rule or
usage. Each Security shall be dated the date of its authentication.

                  The terms and provisions  contained in the forms of Securities
annexed  hereto as Exhibit A and Exhibit B shall  constitute,  and are expressly
made, a part of this Indenture.  To the extent  applicable,  the Company and the
Trustee,  by their execution and delivery of this Indenture,  expressly agree to
such terms and provisions and to be bound thereby.

                       (b)  Securities offered and sold in reliance on Rule 144A
and  securities  offered  and  sold in  offshore  transactions  in  reliance  on
Regulation  S shall be  issued  initially  in the form of one or more  permanent
global  Securities in registered  form,  substantially  in the form of Exhibit A
hereto,  with such  applicable  legends as are provided in Exhibit A hereto (the
"Global  Note"),  deposited with the Trustee,  as custodian for the  Depositary,
duly  executed by the Company and  authenticated  by the Trustee as  hereinafter
provided.  The aggre gate  principal  amount of the Global Note may from time to
time be  increased  or  decreased  by  adjustments  made on the  records  of the
Trustee,  as  custodian  for  the  Depositary  or its  nominee,  as  hereinafter
provided.
                   (c)  Unless and until an Initial Security is exchanged for an
Exchange  Security  in  connection  with  an  effective  Registration  Statement
pursuant to the Registration  Rights Agreement,  the Global Note, shall bear the
following legend on the face thereof:

         THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE U.S.
         SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
         ACT"), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD
         WITHIN THE UNITED STATES OR TO, OR FOR THE ACCOUNT
         OR BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE

         FOLLOWING   SENTENCE.   BY  ITS  ACQUISITION  HEREOF,  THE  HOLDER  (1)
         REPRESENTS  THAT  (A) IT IS A  "QUALIFIED  INSTI  TUTIONAL  BUYER"  (AS
         DEFINED IN RULE 144A UNDER THE SECURITIES  ACT) OR (B) IT IS NOT A U.S.
         PERSON AND IS AC QUIRING THIS  SECURITY IN AN OFFSHORE  TRANSACTION  IN
         COMPLIANCE  WITH REGULATION S UNDER THE SECURITIES ACT, (2) AGREES THAT
         IT WILL NOT, WITHIN TWO YEARS AF TER THE LATER OF THE ORIGINAL ISSUANCE
         OF THIS SECURI TY OR THE LAST DATE ON WHICH THIS  SECURITY  WAS HELD BY
         AN AFFILIATE OF THE COMPANY, RESELL OR OTHERWISE TRANSFER THIS SECURITY
         EXCEPT (A) TO THE  COMPANY OR ANY  SUBSIDIARY  THEREOF,  (B) INSIDE THE
         UNITED STATES TO A QUALIFIED  INSTITUTIONAL  BUYER IN  COMPLIANCE  WITH
         RULE 144A UNDER THE SECURITIES ACT, (C) OUTSIDE THE UNITED STATES IN AN
         OFFSHORE  TRANSACTION IN COM PLIANCE WITH RULE 904 UNDER THE SECURITIES
         ACT, (D) PURSUANT TO THE EXEMPTION FROM REGISTRATION  PROVID ED BY RULE
         144 UNDER THE  SECURITIES  ACT (IF  AVAILABLE)  OR (E)  PURSUANT  TO AN
         EFFECTIVE  REGISTRATION  STATE  MENT UNDER THE  SECURITIES  ACT AND (3)
         AGREES  THAT IT WILL  DELIVER TO EACH  PERSON TO WHOM THIS  SECURITY IS
         TRANSFERRED  A NOTICE  SUBSTANTIALLY  TO THE EFFECT OF THIS LEGEND.  IN
         CONNECTION  WITH ANY TRANSFER OF THIS  SECURITY  WITHIN TWO YEARS AFTER
         THE LATER OF THE ORIGINAL ISSUANCE OF THIS SECURITY OR THE LAST DATE ON
         WHICH THIS SECURITY WAS HELD BY AN AFFILIATE OF THE COMPANY, THE HOLDER
         MUST CHECK THE  APPROPRIATE BOX SET FORTH HEREIN RELATING TO THE MANNER
         OF SUCH  TRANSFER  AND SUBMIT  THIS  SECURITY TO THE  TRUSTEE.  AS USED
         HEREIN, THE TERMS "OFFSHORE TRANSACTION," "UNIT

                                        4





         ED STATES" AND "U.S. PERSON" HAVE THE MEANINGS GIVEN
         TO THEM BY REGULATION S UNDER THE SECURITIES ACT.
         THE INDENTURE CONTAINS A PROVISION REQUIRING THE
         TRUSTEE TO REFUSE TO REGISTER ANY TRANSFER OF THIS
         SECURITY IN VIOLATION OF THE FOREGOING RESTRICTIONS.

                  Each Global Note,  whether or not an Exchange Note, shall bear
the following legend on the face thereof:

         UNLESS THIS  SECURITY IS PRESENTED BY AN AUTHORIZED  REPRESENTATIVE  OF
         THE DEPOSITORY TRUST COMPANY,  A NEW YORK CORPORATION  ("DTC"),  TO THE
         COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND ANY SECURITY  ISSUED IS  REGISTERED IN THE NAME OF CEDE & CO. OR IN
         SUCH OTHER NAME AS IS RE QUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC
         (AND ANY  PAYMENT IS MADE TO CEDE & CO. OR TO SUCH  OTHER  ENTITY AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTA  TIVE OF DTC),  ANY  TRANSFER,
         PLEDGE OR OTHER USE HERE OF FOR VALUE OR  OTHERWISE BY OR TO ANY PERSON
         IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
         INTEREST HEREIN.

         TRANSFERS OF THIS SECURITY SHALL BE LIMITED TO TRANS FERS IN WHOLE, BUT
         NOT IN PART,  TO  NOMINEES  OF DTC OR TO A  SUCCESSOR  THEREOF  OR SUCH
         SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS SECURITY SHALL BE
         LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH
         IN SECTION 2.8 OF THE INDENTURE.

SECTION 2.2 Execution and Authentication.

                  Two  Officers  shall sign the  Securities  for the  Company by
manual or facsimile signature.  The Company's seal shall be impressed,  affixed,
imprint ed or reproduced on the Securities and may be in facsimile form.

                  If an Officer whose signature is on a Security no longer holds
that  office at the time the  Security  is  authenticated,  the  Security  shall
nevertheless be valid.

                  A  Security  shall  not be valid  until  authenticated  by the
manual signature of an authorized  signatory of the Trustee. The signature shall
be  conclusive  evidence  that the  Security has been  authenticated  under this
Indenture.

                  The Trustee  shall  authenticate  (i) Initial  Securities  for
original  issue  in an  aggregate  principal  amount  of  $200,000,000  and (ii)
Exchange  Securities  for issue only in exchange  pursuant  to the  Registration
Rights  Agreement,  for a like principal amount of Initial  Securities,  in each
case,  upon a written order of the Company  signed by two  Officers.  Such order
shall specify the amount of the Securities to be  authenticated  and the date on
which the original issue of Securi ties is to be  authenticated  and whether the
Securities are to be Initial  Securities or Exchange  Securities.  The aggregate
principal  amount  of  Securities   outstanding  at  any  time  may  not  exceed
$275,000,000 except as provided in Section 2.9.

                  The Trustee shall  initially act as  authenticating  agent and
may   subsequently   appoint  another  Person   acceptable  to  the  Company  as
authenticating agent to authenticate Securities.  Unless limited by the terms of
such appoint ment, an authenticating agent may authenticate  Securities whenever
the Trustee may do so. Each reference in this Indenture to authentication by the
Trustee includes  authentication by such agent. An authenticating  agent has the
same rights as an Agent to deal with the Company or an Affiliate of the Company.
Provided that the  authentication  agent has entered into an agreement  with the
Company concerning the  authentication  agent's duties, the Trustee shall not be
liable for any act or any  failure of the  authenticating  agent to perform  any
duty either required herein or authorized  herein to be performed by such person
in accordance with this Indenture.

                  The Securities shall be issued only in registered form without
coupons and only in denominations of $1,000 and any integral multiple thereof.

SECTION 2.3 Registrar and Paying Agent.

                  The  Company   shall   maintain  an  office  or  agency  where
Securities  may be  presented  for  registration  of  transfer  or for  exchange
("Registrar")  and an office or agency where  Securities  may be  presented  for
payment ("Paying Agent").  The Registrar shall keep a register of the Securities
and of  their  transfer  and  exchange.  The  Company  may  appoint  one or more
co-registrars and one or more additional paying agents.  The term "Paying Agent"
includes  any  additional  paying  agent and the term  "Registrar"  includes any
co-registrar.

                  The Company shall enter into an appropriate  agency  agreement
with any Registrar,  Paying Agent or co-registrar not a party to this Indenture.
The agreement  shall  implement the  provisions of this Indenture that relate to
such  agent.  The  Company  shall  promptly  notify the  Trustee of the name and
address of any such agent and any change in the  address of such  agent.  If the
Company fails to maintain a Registrar or Paying Agent,  the Trustee shall act as
such and shall be  entitled to  appropriate  compensation  therefor  pursuant to
Section 6.7. The Company or any  Subsidiary  or Affiliate of the Company may act
as Paying Agent, Registrar, co-registrar or transfer agent.

                  The Company  initially  appoints the Trustee as Registrar  and
Paying Agent in connection with the Securities.

SECTION 2.4  Paying Agent To Hold Money in Trust.

                  On or prior to 11:00 a.m.,  eastern standard time, on each due
date of the principal  and interest on any Security  (including  any  redemption
date fixed under the terms of such Security or this Indenture) the Company shall
deposit with the Paying Agent a sum of money,  in immediately  available  funds,
sufficient  to pay such  principal  and  interest in funds  available  when such
becomes  due.  The  Company  shall  require  each Paying  Agent  (other than the
Trustee) to agree in writing  that the Paying  Agent shall hold in trust for the
benefit of Securityholders or the Trustee all money held by the Paying Agent for
the pay ment of principal of or interest on the  Securities  (whether such money
has been paid to it by the Company or any other obligor on the  Securities)  and
shall notify the Trustee of any default by the Company (or any other  obligor on
the Securi ties) in making any such  payment.  If the Company or a Subsidiary or
an affiliate of the Company acts as Paying Agent,  it shall  segregate the money
held by it as Paying Agent and hold it as a separate  trust fund for the benefit
of the  Securityholders.  If the Company  defaults in its  obligation to deposit
funds for the payment of principal  and  interest  the Trustee  may,  during the
continuation of such default, require a Paying Agent to pay all money held by it
to the  Trustee.  The Company at any time may require a Paying  Agent to pay all
money held by it to the Trustee and to account  for any funds  disbursed  by it.
Upon doing so, the Paying  Agent  (other  than the  Company or a  Subsidiary  or
Affiliate  of the  Company)  shall  have no  further  liability  for  the  money
delivered to the Trustee.

SECTION 2.5 Securityholder Lists.

                  The Trustee shall  preserve in as current a form as reasonably
practicable  the most recent list  available to it of the names and addresses of
Securityholders.  If the Trustee is not the Registrar, the Company shall furnish
to the Trustee at least five Business Days before each Interest Payment Date and
at such other  times as the  Trustee  may request in writing a list in such form
and as of such  date as the  Trustee  may  reasonably  require  of the names and
addresses of the  Securityholders,  and the Company shall otherwise  comply with
TIA Sec 312(a).

SECTION 2.6 Transfer and Exchange.

                    (a)  The Securities shall be transferable only upon the sur-
render of a Security for registration of transfer.  When a Security is presented
to the Registrar or a  co-registrar  with a request to register a transfer,  the
Registrar  shall  register  the transfer as  requested  if the  requirements  of
Section 8-401(1) of the Uniform Commercial Code are met (and the Registrar shall
be entitled to assume such requirements have been met unless it receives written
notice to the contrary),  the requirements of Section 2.7 or Section 2.8 of this
Indenture,  if  applicable,  are met and,  if so  required by the Trustee or the
Company,  if the Security  presented is accompanied  by a written  instrument of
transfer in form  satisfactory to the Trustee and the Company,  duly executed by
the registered owner or by his or her attorney duly authorized in writing.  When
Securities  are presented to the Registrar or a  co-registrar  with a request to
exchange them for an equal  principal  amount of Securities of other  authorized
denominations   (including  on  exchange  of  Initial  Securities  for  Exchange
Securities),  the Regis trar shall make the  exchange as  requested  if the same
requirements  are met;  provided  that no  exchanges of Initial  Securities  for
Exchange  Securities shall occur until a Registration  Statement shall have been
declared effective by the SEC and that any Initial Securities that are exchanged
for  Exchange   Securities  shall  be  cancelled  by  the  Trustee.   To  permit
registration  of transfers  and  exchanges,  the Company  shall  execute and the
Trustee shall  authenticate  Securities  at the  Registrar's  or  co-registrar's
request.  The  Depositary  shall,  by  acceptance  of a Global Note,  agree that
transfers  of  beneficial  interests  in such Global  Note may be effected  only
through a book-entry  system  maintained by the Depositary  (or its agent),  and
that ownership of a beneficial  interest in the Global Note shall be required to
be reflected in a book entry.

                   No  service  charge  shall  be made for any  registration  of
transfer or exchange of the Securities, but the Company may require payment of a
sum suffi

                                        5




cient to cover any transfer tax or similar governmental charge payable in connec
tion  therewith  (other  than any such  transfer  taxes or similar  governmental
charge payable upon exchange pursuant to Section 2.12 or 8.5 of this Indenture).

                  The Company  shall not be  required to make and the  Registrar
need not register  transfers or exchanges of Securities  selected for redemption
(except,  in the case of Securities to be redeemed in part, the portion  thereof
not to be redeemed) or for a period of 15 days before a selection of  Securities
to be redeemed or 15 days before an interest payment date.

                  Prior to the due  presentation for registration of transfer of
any Security,  the Company,  the Trustee, the Paying Agent, the Registrar or any
co-registrar  may  deem  and  treat  the  person  in whose  name a  Security  is
registered  as the absolute  owner of such Security for the purpose of receiving
payment of principal of and interest on such Security and for all other purposes
whatsoever,  whether or not such  Security is overdue,  and none of the Company,
the  Trustee,  the Paying  Agent,  the  Registrar or any  co-registrar  shall be
affected by notice to the contrary.

SECTION 2.7          Book-Entry Provisions for Global Note.
                     -------------------------------------

                   (a)  The Global Note initially shall (i) be registered in the
name of the Depositary for such Global Notes or the nominee of such  Depositary,
(ii) be delivered to the Trustee as custodian for such Depositary and (iii) bear
legends as set forth in Section 2.1(c).

                  Members  of,  or  participants  in,  the  Depositary   ("Agent
Members")  shall have no rights under this  Indenture with respect to any Global
Note held on their behalf by the Depositary, or the Trustee as its custodian, or
under the Global  Note and the  Depositary  may be treated by the  Company,  the
Trustee  and any agent of the Company or the  Trustee as the  absolute  owner of
such Global Note, for all purposes  whatsoever.  Notwithstanding  the foregoing,
nothing  herein  shall  prevent  the  Company,  the  Trustee or any agent of the
Company or the Trustee, from giving effect to any written  certification,  proxy
or other  authoriza tion  furnished by the Depositary or impair,  as between the
Depositary and its Agent Members, the operation of customary practices governing
the exercise of the rights of a holder of any Security.

                           (b)  Transfers of the Global Note shall be limited to
transfers of such Global Note in whole, but not in part, to the Depositary,  its
successors or their respective nominees. Beneficial interests in the Global Note
may be transferred in accordance with the applicable rules and procedures of the
Depositary and the provisions of Section 2.8 hereof.

                         (c)  The registered holder of the Global Note may grant
proxies and otherwise authorize any person,  including Agent Members and persons
that may hold  interests  through Agent  Members,  to take any action which such
holder is entitled to take under this Indenture or the Securities.

SECTION 2.8  Special Transfer Provisions.

                  Unless  and until an  Initial  Security  is  exchanged  for an
Exchange  Note, or the Initial  Securities are registered for sale in connection
with an effective  Registration  pursuant to the Registration  Rights Agreement,
the follow ing provisions shall apply:

                           (a)  Transfers to QIBs and to Non-U.S. Persons.  The
        following provisions shall apply with respect to the registration of any
        proposed transfer of an Initial Security to a QIB and transfers to or by
        Non-U.S. Persons:

                                    (i)  The   Registrar   shall   register  the
                  transfer  if  such  transfer  is  being  made  by  a  proposed
                  transferor who has checked the box provided for on the form of
                  Initial Security stating, or has otherwise advised the Company
                  and the  Registrar  in writing sub  stantially  in the form of
                  Exhibit  C hereto,  that the sale has been made in  compliance
                  with the  provisions  of Rule  144A to a  transfer  ee who has
                  signed the  certification  provided for on the form of Initial
                  Security stating, or has otherwise advised the Company and the
                  Registrar  in  writing,  that  it is  purchasing  the  Initial
                  Security  for its own  account or an account  with  respect to
                  which it exercises sole investment  discretion and that it and
                  any such account is a QIB within the meaning of Rule 144A, and
                  is aware that the sale to it is being made in reliance on Rule
                  144A and  acknowledges  that it has received such  information
                  regarding  the  Company as it has  request ed pursuant to Rule
                  144A or has  determined  not to request such  information  and
                  that it is  aware  that the  transferor  is  relying  upon its
                  foregoing representations in order to claim the exemption from
                  registration provided by Rule 144A.

                                    (ii)  The  Registrar   shall   register  the
                  transfer of any Initial Security if the proposed transferee is
                  a Non-U.S. Person and the proposed transferor has delivered to
                  the  Registrar  a  certificate  substantially  in the  form of
                  Exhibit D hereto.

                           (b) Private Placement Legend.  Upon the transfer,  ex
         change or replacement  of Securities not bearing the Private  Placement
         Legend,  the Registrar  shall deliver  Securities  that do not bear the
         Private Placement Legend. Upon the transfer, exchange or replacement of
         Securities  bearing the Private Placement  Legend,  the Registrar shall
         deliver only Securities that bear the Private  Placement  Legend unless
         there is  delivered to the  Registrar an opinion of counsel  reasonably
         satisfactory  to the  Company  and the  Registrar  to the  effect  that
         neither  such  legend nor the  related  restrictions  on  transfer  are
         required in order to maintain  compliance  with the  provisions  of the
         Securities Act.

                           (c)  General.  By  its  acceptance  of  any  Security
         bearing  the Private  Placement  Legend,  each holder of such  Security
         acknowledges the restrictions on transfer of such Security set forth in
         this Indenture and in the Private  Placement  Legend and agrees that it
         will transfer such  Security  only as provided in this  Indenture.  The
         Registrar  shall not  register a transfer of any  Security  unless such
         transfer  complies with the  restrictions  on transfer of such Security
         set forth in this  Indenture,  provided,  however,  that the  Registrar
         shall  register  the transfer of any Initial  Security,  whether or not
         such  Initial  Security  bears the  Private  Placement  Legend,  if the
         requested  transfer  is at  least  two  years  after  the  later of the
         original Issue Date of the Initial  Security and the last date on which
         such Initial  Security  was held by an  affiliate  of the  Company.  In
         connection  with any transfer of Securities,  each holder agrees by its
         acceptance  of the Initial  Securities  to furnish the Registrar or the
         Company such  certifications,  legal  opinions or other  information as
         either of them may reasonably  require to confirm that such transfer is
         being made pursuant to an exemption  from, or a transaction not subject
         to, the registration  requirements of the Securities Act; provided that
         the  Registrar  shall not be required to  determine  (but may rely on a
         determination  made by the Company with respect to) the  sufficiency of
         any such certifications, legal opinions or other information.

                  The Registrar shall retain copies of all letters,  notices and
other  written  communications  received  pursuant to Section 2.7 hereof or this
Section
2.8.  The  Company  shall have the right to inspect  and make copies of all such
letters, notices or other written communications at any reasonable time upon the
giving of reasonable written notice to the Registrar.

SECTION 2.9 Replacement Securities.

                  If a mutilated  Security is surrendered to the Registrar or if
the Holder of a Security  claims that the Security  has been lost,  destroyed or
wrong  fully  taken and the Holder  furnishes  to the  Company  and the  Trustee
evidence to their satisfaction of such loss, destruction or wrongful taking, the
Company  shall  issue and the  Trustee  shall,  in the  absence of notice to the
Company or the  Trustee  that such  Security  has been  acquired  by a bona fide
purchaser,  authenti cate a replacement  Security if the requirements of Section
8-405  of the  Uniform  Commercial  Code are met  (and  the  Registrar  shall be
entitled to assume such  requirements  have been met unless it receives  written
notice to the contrary) and if there is delivered to the Company and the Trustee
such  security or  indemnity  as may be required to save each of them  harmless,
satisfactory to the Company or the Trustee,  as the case may be. The Company and
the Trustee may charge the Holder for their expenses in replacing a Security.

                  Every replacement Security is an additional  obligation of the
Company and shall be entitled to the benefits of this Indenture.

SECTION 2.10 Outstanding Securities.

                  The Securities  outstanding at any time are all the Securities
authenticated by the Trustee except for those canceled by it, those delivered to
it for cancellation, and those described in this Section as not outstanding.

                  If a Security is replaced  pursuant to Section  2.9, it ceases
to be outstanding  unless the Trustee and the Company receive proof satisfactory
to them that the replaced Security is held by a bona fide purchaser.

                  If all  the  principal  and  interest  on any  Securities  are
considered paid under Section 3.1, such Securities cease to be outstanding under
this Inden ture and interest on such Securities shall cease to accrue.

                  If the Paying Agent (other than the Company or a Subsidiary or
an Affiliate of the Company) holds in accordance with this Indenture on a redemp
tion date or maturity  date money  sufficient  to pay all principal and interest
due on
that date then on and after that date such  Securities  cease to be  outstanding
and interest on them ceases to accrue  (unless  there shall be a default in such
pay ment).

                  If a Security  is called for  redemption,  the Company and the
Trustee  need not treat the  Security  as  outstanding  in  determining  whether
Holders of the required  principal  amount of Securities  have  concurred in any
direction, waiver or consent.

                  Subject  to  Section  2.11,  a  Security  does not cease to be
outstanding because the Company or an Affiliate thereof holds the Security.

SECTION 2.11 Determination of Holders' Action.

                  In determining  whether the Holders of the required  principal
amount of  Securities  have  concurred in any  direction,  amendment,  waiver or
consent,  Securities owned by or pledged to the Company,  any other obligor upon
the  Securities or any Affiliate of the Company,  or such other obligor shall be
disregarded  and deemed not to be  outstanding,  except that for the purposes of
determining  whether  the  Trustee  shall be  protected  in  relying on any such
direction,  waiver or consent,  only  Securities  which the Trustee knows are so
owned or pledged shall be so disregarded.

SECTION 2.12 Temporary Securities.

                  Until  definitive  Securities  are  ready  for  delivery,  the
Company may prepare and the Trustee  shall  authenticate  temporary  Securities.
Temporary Securities shall be substantially in the form of definitive Securities
but may have  variations  that the Company  considers  appropriate for temporary
Securities.  Without  unreasonable  delay,  the  Company  shall  prepare and the
Trustee,  upon the written order of the Company  signed by two  Officers,  shall
authenticate  definitive Securities in exchange for temporary  Securities.  Such
exchange  shall be made by the Company at its own expense and without any charge
therefor.  Until so ex changed,  temporary  Securities  shall be entitled to the
same rights, benefits and privileges as definitive Securities.

SECTION 2.13  Cancellation.

               The Company at any time may deliver Securities to the Trustee for
cancellation.  The Registrar and Paying Agent shall forward to the Trustee any
Securities  surrendered  to them  for  registration  of  transfer,  exchange  or
payment. The Trustee shall cancel all Securities surrendered for registration of
transfer,  exchange,  payment or  cancellation  and shall return such  cancelled
securities to the Company.  The Company may not issue new  Securities to replace
Securities that it has paid or delivered to the Trustee for cancellation.

SECTION 2.14 Defaulted Interest.

                  If the  Company  defaults  in a  payment  of  interest  on the
Securities,  it shall pay defaulted  interest,  plus any interest payable on the
defaulted  interest to the extent permitted by law, in any lawful manner. It may
pay  the  defaulted  interest  to  the  Persons  who  are  Securityholders  on a
subsequent  special  record date which date shall be at least five Business Days
prior to the payment  date.  The Company  shall fix the special  record date and
payment date. At least 15 days before the special  record date,  the Company (or
the  Trustee,  in the name of and at the expense of the  Company)  shall mail to
Securityholders  a notice that states the special record date,  payment date and
amount of interest to be paid.


                                   ARTICLE III

                                    COVENANTS

SECTION 3.1 Payment of Securities.

                  The Company  shall pay the  principal  of and  interest on the
Securi  ties on the dates and in the  manner  provided  in the  Securities.  The
Company  shall  pay  interest  on  overdue  principal  at the rate  borne by the
Securities;  it shall pay  interest on overdue  installments  of interest at the
rate borne by the Securities to the extent lawful.  Principal and interest shall
be considered paid on the date due (including a redemption  date) if the Trustee
or the Paying Agent  (other than the Company or a Subsidiary  or an Affiliate of
the Company) has received  from or on behalf of the Company on or prior to 11:00
a.m., eastern standard time, on that date, in immediately available funds, money
sufficient to pay all principal and interest then due.

SECTION 3.2 Maintenance of Office or Agency.

                  The Company shall  maintain in the Borough of  Manhattan,  the
City of New York, an office or agency where  Securities may be  surrendered  for
registration of transfer or exchange or for  presentation  for payment and where
notices and demands to or upon the Company in respect of the Securities and this
Indenture  may be served.  The Company  will give prompt  written  notice to the
Trustee of the  location,  and any  change in the  location,  of such  office or
agency.  If at any time the  Company  shall fail to maintain  any such  required
office or agency or to  furnish  the  Trustee  with the  address  thereof,  such
presentations,  surrenders,  notices  and  demands  may be made or served at the
address of the Trustee set forth in Section 10.2 of this Indenture.

                  The Company may also from time to time  designate  one or more
other offices or agencies  where the  Securities may be presented or surrendered
for any or all such  purposes  and may from time to time  rescind  such  designa
tions;  provided,  however,  that no such designation or rescission shall in any
manner  relieve the Company of its obligation to maintain an office or agency in
the Borough of Manhattan,  the City of New York, for such purposes.  The Company
will give  prompt  written  notice to the  Trustee  of any such  designation  or
rescission  and of any change in the  location of any such other  office or agen
cy.

SECTION 3.3 Limitation on Restricted Payments.

                  (a) So  long as any of the  Securities  are  outstanding,  the
Company shall not, and shall not permit any Restricted  Subsidiary to,  directly
or indirectly,  (i) declare or pay any dividend on or make any  distribution  or
similar  payment of any sort in  respect of its  Capital  Stock  (including  any
payment in connection with any merger or consolidation involving the Company) to
the direct or indirect  holders of its Capital  Stock  (other than  dividends or
distributions  payable solely in its Non-Convertible  Capital Stock or rights to
acquire its Non-Convertible Capital Stock and dividends or distributions payable
solely  to the  Company  or a  Restricted  Subsidiary  and  other  than pro rata
dividends paid by a Subsidiary  with respect to a series or class of its Capital
Stock the majority of which is held by the Company or a Wholly Owned  Subsidiary
that is not a Foreign Subsidiary),  (ii) purchase,  redeem, defease or otherwise
acquire or retire for value any Capital Stock of the Company or of any direct or
indirect  parent of the Company,  or, with respect to the Company,  exercise any
option to exchange any Capital Stock
that by its terms is  exchangeable  solely at the option of the  Company  (other
than into Capital Stock of the Company which is neither  Exchangeable  Stock nor
Redeemable Stock), (iii) purchase,  repurchase,  redeem, defease or otherwise ac
quire or retire for value,  prior to scheduled  maturity or scheduled  repayment
thereof or scheduled  sinking fund payment thereon,  any  Subordinated  Indebted
ness (other than the purchase,  repurchase or other  acquisition of Subordinated
Indebtedness  purchased in anticipation of satisfying a sinking fund obligation,
principal installment or final maturity, in each case due within one year of the
date of acquisition)  or (iv) make any Investment,  other than a Controlled Non-
Subsidiary  Investment  or a  payment  described  in clause  (vi) of the  second
sentence of Section 3.11, in any Unrestricted Subsidiary or any Affiliate of the
Company  other than a  Restricted  Subsidiary  or a Person  which will  become a
Restricted  Subsidiary as a result of any such Investment  (each such payment de
scribed in clauses (i)-(iv) of this paragraph, a "Restricted  Payment"),  unless
at the time of and after giving effect to the proposed Restricted Payment:

                     (1)  no Default or Event of Default shall have occurred and
be continuing (or would result therefrom);

                      (2)  the Company would be permitted to Incur an additional
$1 of Indebtedness pursuant to the provisions of Section 3.4(a); and

                       (3)  the aggregate amount of all such Restricted Payments
subsequent to the Issue Date shall not exceed the sum of:

                  (A) 50% of aggregate  Consolidated  Net Income  accrued during
         the period  (treated as one accounting  period) from January 1, 1994 to
         the  end  of  the  most  recent  fiscal  quarter  for  which  financial
         statements  are avail  able (or if such  Consolidated  Net  Income is a
         deficit,  minus 100% of such deficit),  and minus 100% of the amount of
         any write-downs,  write-offs,  other negative  reevaluations  and other
         negative  extraordinary charges not otherwise reflected in Consolidated
         Net Income during such period;

                  (B)  if  the  Securities  are  Investment  Grade   immediately
         following  the  Restricted   Payment  in  connection  with  which  this
         calculation is made, an additional 25% of  Consolidated  Net Income for
         any period of one or more consecutive  completed fiscal quarters ending
         with  the  last  fiscal  quarter  completed  prior  to the date of such
         Restricted  Payment during which the Securities were  Investment  Grade
         for the entire period;

                  (C) the aggregate  Net Cash  Proceeds  received by the Company
         after January 1, 1994 from the sale of Capital Stock (other than Redeem
         able Stock or  Exchangeable  Stock) of the Company to any person  other
         than  the  Company,  any  of  its  Subsidiaries  or an  employee  stock
         ownership plan;

                  (D) the  amount  by which the  principal  amount  of,  and any
         accrued  interest  on,  Indebtedness  of the Company or its  Restricted
         Subsidiaries  is reduced on the  Company's  Consolidated  balance sheet
         upon the conversion or exchange (other than by a Subsidiary) subsequent
         to the Issue Date of any  Indebtedness of the Company or any Restricted
         Subsidiary  converted  or  exchanged  for  Capital  Stock  (other  than
         Redeemable  Stock or Ex  changeable  Stock)  of the  Company  (less the
         amount of any cash, or the value of any other property,  distributed by
         the  Company  or any  Restricted  Subsidiary  upon such  conversion  or
         exchange);

                  (E) an amount  equal to the net  reduction in  Investments  in
         Unre  stricted  Subsidiaries  resulting  from  payments  of interest on
         Indebtedness,  dividends,  repayments  of loans or  advances,  or other
         transfers  of assets,  in each case to the  Company  or any  Restricted
         Subsidiary from Unrestricted  Subsidiaries,  or from  redesignations of
         Unrestricted  Subsidiaries as Restricted  Subsidiaries  (valued in each
         case as provided in the definition of "Investments"),  not to exceed in
         the case of any  Unrestricted  Subsidiary  the  amount  of  Investments
         previously  made by the Company or any  Restricted  Subsidiary  in such
         Unrestricted Subsidiary; and

                  (F) $15 million.

                  (b) The failure to satisfy the conditions set forth in clauses
(2) and (3) of Subsection 3.3(a) shall not prohibit any of the following as long
as the  condition  set forth in clause  (1) of  Subsection  3.3(a) is  satisfied
(except as set forth below):

                           (i) notwithstanding clause (1) of Section 3.3(a), the
         occurrence  or  existence  of a  Default  at the  time  of  payment  of
         dividends paid within 60 days after the date of declaration  thereof if
         at such date of  declaration  such  dividend  would have  complied with
         Subsection 3.3(a); shall not prohibit the payment of such dividends;

                           (ii) any purchase,  redemption,  defeasance, or other
         acquisi tion or retirement  for value of Capital Stock or  Subordinated
         Indebtedness  of  the  Company  made  by  exchange  for,  or out of the
         proceeds of the substantially  concurrent sale of, Capital Stock of the
         Company (other than Redeemable  Stock or  Exchangeable  Stock and other
         than  stock  issued or sold to a  Subsidiary  or to an  employee  stock
         ownership plan), provided,  however, that notwithstanding clause (1) of
         Subsection  3.3(a),  the occur rence or existence of a Default or Event
         of Default shall not prohibit, for purposes of this Section, the making
         of such  purchase,  redemption,  defea  sance or other  acquisition  or
         retirement,   and  provided,   further,   such  purchase,   redemption,
         defeasance or other  acquisition or retirement shall not be included in
         the calculation of Restricted Payments made for purpos es of clause (3)
         of Subsection 3.3(a) and provided,  further, that the Net Cash Proceeds
         from such sale shall be excluded from  sub-clause  (C) of clause (3) of
         Subsection 3.3(a);

                           (iii) any purchase,  redemption,  defeasance or other
         acqui sition or retirement for value of  Subordinated  Indebtedness  of
         the  Compa  ny made by  exchange  for,  or out of the  proceeds  of the
         substantially  concurrent  Incurrence  of for  cash  (other  than  to a
         Subsidiary),  new In debtedness of the Company, provided, however, that
         (A) such new Indebtedness shall be contractually  subordinated in right
         of  payment  to the  Securities  at  least to the  same  extent  as the
         Indebtedness  being so re deemed,  repurchased,  defeased,  acquired or
         retired, (B) if the Indebt edness being purchased,  redeemed,  defeased
         or  acquired  or  retired  for  value is  Non-Recourse  Debt,  such new
         Indebtedness shall be Non-Re course Debt, (C) such new Indebtedness has
         a Stated Maturity either (1) no earlier than the Stated Maturity of the
         Indebtedness redeemed, repur chased,  defeased,  acquired or retired or
         (2)  after  the  Stated   Maturity  of  the  Securities  and  (D)  such
         Indebtedness  has an Average  Life equal to or greater than the Average
         Life of the Indebtedness redeemed,  repurchased,  defeased, acquired or
         retired,  and  provided,  further,  that  such  purchase,   redemption,
         defeasance or other  acquisition or retirement shall not be included in
         the calculation of Restricted  Payments made for purposes of clause (3)
         of Subsection 3.3(a);

                           (iv) any  purchase,  redemption,  defeasance or other
         acqui sition or retirement for value of Subordinated  Indebtedness upon
         a Change of  Control or an Asset  Sale to the  extent  required  by the
         indenture or
         other agreement  pursuant to which such  Subordinated  Indebtedness was
         issued, but only if the Company (A) in the case of a Change of Control,
         has made an offer to  repurchase  the  Securities  as  described  under
         Section  3.8 or (B) in the case of an Asset  Sale,  has applied the Net
         Available  Cash from such Asset Sale in accordance  with the provisions
         described under Section 3.12; and

SECTION 3.4 Limitation on Incurrence of Indebtedness.

                  (a) The Company shall not, and shall not permit any Restricted
Subsidiary to, directly or indirectly,  Incur any Indebtedness,  except that the
Company may Incur Indebtedness if, after giving effect thereto, the Consolidated

Coverage Ratio would be greater than 2:1.

                  (b)  Notwithstanding  the  foregoing,  this Section  shall not
limit the  ability of the  Company  or any  Restricted  Subsidiary  to Incur the
following Indebtedness:

                     (i) Refinancing Indebtedness (except with respect to Indebt
         edness referred to in clause (ii), (iii) or (iv) below);

                           (ii)  in  addition  to  any  Indebtedness   otherwise
         permitted to be Incurred hereunder,  Indebtedness of the Company at any
         one time out  standing in an aggregate  principal  amount not to exceed
         $25,000,000 and provided that the proceeds of such  Indebtedness  shall
         not be used for the purpose of making any Restricted  Payments pursuant
         to clause (i) or (ii) of Section 3.3(a);

                           (iii)  Indebtedness  of the Company  which is owed to
         and held by a Wholly  Owned  Subsidiary  and  Indebtedness  of a Wholly
         Owned  Subsidiary  which is owed to and held by the Company or a Wholly
         Owned Subsidiary;  provided,  however,  that any subsequent issuance or
         transfer of any Capital  Stock which  results in any such Wholly  Owned
         Subsidiary  ceasing to be a Wholly Owned  Subsidiary or any transfer of
         such  Indebtedness  (other than to the Company or a Wholly Owned Subsid
         iary) shall be deemed,  in each case, to constitute  the  Incurrence of
         such  Indebtedness by the Company or by a Wholly Owned  Subsidiary,  as
         the case may be;

                          (iv) Indebtedness of the Company under the Bank Credit
         Agreement  which,  when taken  together  with the  aggregate  amount of
         Indebtedness Incurred pursuant to clause (viii) of this subsection,  is
         not in excess of $50,000,000, and Indebtedness of the Company under the
         Working Capital Credit Agreement not in excess of $25,000,000;

                           (v) Acquired  Indebtedness;  provided,  however, that
         the Company would have been able to Incur such Indebtedness at the time
         of the Incurrence thereof pursuant to Section 3.4(a);

                           (vi)  Indebtedness  of the  Company  or a  Restricted
         Subsidiary  outstanding  on the Issue  Date  (other  than  Indebtedness
         referred  to in clause  (iv)  above and  Indebtedness  being  repaid or
         retired with the pro ceeds of the Offering);

                           (vii)  Non-Recourse  Debt of a Restricted  Subsidiary
         (other than a Restricted  Subsidiary  existing on the Issue Date),  the
         proceeds of which are used to acquire,  develop, improve or construct a
         new Facility of such Restricted Subsidiary;

                           (viii)  guarantees by the Company of  Indebtedness of
         Re  stricted  Subsidiaries  which,  but for such  guarantees,  would be
         permitted  to be  Incurred  pursuant  to clause  (vii) of this  Section
         3.4(b),  provided that the aggregate  principal  amount of Indebtedness
         Incurred  pursuant  to this clause  (viii),  when taken  together  with
         outstanding  Indebtedness  Incurred  under  the Bank  Credit  Agreement
         pursuant to clause  (iv) of this  Section  3.4(b),  is not in excess of
         $50,000,000;

                           (ix) Related Asset Indebtedness, provided that at the
         time  of  the  Incurrence  thereof,  giving  pro  forma  effect  to the
         Incurrence   thereof,   Moody's  and  S&P  shall  have  affirmed  their
         respective  ratings of the Securities in effect prior to the Incurrence
         of such Related Asset In debtedness; and

                           (x)  the Securities.

                  (c) Notwithstanding Sections 3.4(a) and (b), the Company shall
not Incur any  Indebtedness  if the  proceeds  thereof  are  used,  directly  or
indirectly,  to repay, prepay, redeem, defease,  retire, refund or refinance any
Subordinated  Indebtedness  unless  such  repayment,   prepayment,   redemption,
defeasance,  retire ment,  refunding or refinancing is not prohibited by Section
3.3 or unless such In

                                        6




debtedness shall be contractually subordinated to the Securities at least to the
same extent as such Subordinated Indebtedness.

SECTION 3.5  Limitation on Payment Restrictions Affecting Subsidiaries.

                  The Company shall not, and shall not permit any Subsidiary to,
create or otherwise cause or permit to exist or become  effective any consensual
encumbrance or  restriction  on the ability of any Restricted  Subsidiary to (i)
pay dividends to or make any other  distributions  on its Capital Stock,  or pay
any  Indebtedness  or  other  obligations  owed  to the  Company  or  any  other
Restricted  Subsidiary,  (ii) make any  Investments  in the Company or any other
Restricted  Subsidiary  or (iii)  transfer  any of its property or assets to the
Company  or  any  other  Restricted  Subsidiary;  provided,  however,  that  the
foregoing shall not apply to:

                  (a) any encumbrance or restriction  existing  pursuant to this
Indenture or any other  agreement or  instrument as in effect or entered into on
the Issue Date;

                  (b)  any   encumbrance  or  restriction   with  respect  to  a
Subsidiary  pursuant  to an  agreement  relating to any  Acquired  Indebtedness;
provided,  however,  that such  encumbrance or  restriction  was not Incurred in
connection with or in contemplation of such Subsidiary becoming a Subsidiary;

                  (c) any  encumbrance or  restriction  pursuant to an agreement
effecting a refinancing of  Indebtedness  referred to in clause (a) or (b) above
or contained in any amendment or modification with respect to such Indebtedness;
provided,  however, that the encumbrances and restrictions contained in any such
agreement,  amendment or  modification  are no less favorable in any material re
spect with  respect to the matters  referred to in clauses  (i),  (ii) and (iii)
above than the encumbrances  and  restrictions  with respect to the Indebtedness
being refi nanced, amended or modified;

                  (d)  in  the   case   of   clause   (iii)   above,   customary
non-assignment  provisions of (A) any leases governing a leasehold interest, (B)
any supply,  license or other  agreement  entered into in the ordinary course of
business of the Company or any Subsidiary or (C) any security agreement relating
to a Lien permitted by Section 3.7(l), that, in the reasonable  determination of
the President or Chief Financial Officer of the Company (x) is required in order
to obtain such financing  referred to in Section 3.7(l) and (y) is customary for
such financings;
                  (e) any  restrictions  with  respect to a  Subsidiary  imposed
pursuant to an  agreement  entered  into for the sale or  disposition  of all or
substantially all of the Capital Stock or assets of such Subsidiary  pending the
closing of such sale or disposition;

                  (f) any encumbrance  imposed pursuant to the terms of Indebted
ness incurred pursuant to Section 3.4(b)(vii), provided that such encumbrance in
the written opinion of the President or Chief Financial  Officer of the Company,
(x) is required in order to obtain such  financing,  (y) is  customary  for such
financings  and (z) applies only to the assets of or revenues of the  applicable
Facility; or

            (g)  any encumbrance or restriction existing by reason of applicable
law.

SECTION 3.6 Limitation on Sale/Leaseback Transactions.

                  The  Company  shall not,  and shall not permit any  Restricted
Subsidiary to, enter into any Sale/Leaseback  Transaction unless (i) the Company
or such Subsidiary would be entitled to create a Lien on such property  securing
Indebtedness  in an amount equal to the  Attributable  Debt with respect to such
transaction  without  equally and ratably  securing the  Securities  pursuant to
Section 3.7 or (ii) the net proceeds of such sale are at least equal to the fair
value (as determined by the Board of Directors) of such property and the Company
or such Subsidiary shall apply or cause to be applied an amount in cash equal to
the net proceeds of such sale to the retirement, within 30 days of the effective
date of any such  arrangement,  of  Senior  Indebtedness  or  Indebtedness  of a
Restricted Subsidiary;  provided,  however, that in addition to the transactions
permitted  pursuant to the  foregoing  clauses (i) and (ii),  the Company or any
Restricted  Sub sidiary may enter into a  Sale/Leaseback  Transaction as long as
the  sum of (x) the  Attributable  Debt  with  respect  to  such  Sale/Leaseback
Transaction and all other  Sale/Leaseback  Transactions entered into pursuant to
this proviso,  plus (y) the amount of outstanding  Indebtedness secured by Liens
Incurred  pursuant to the final  proviso to Section 3.7,  does not exceed 10% of
Consolidated Net Tangible Assets as determined based on the consolidated balance
sheet of the Company as of the end of the most recent  fiscal  quarter for which
financial  statements are available;  and provided,  further,  that a Restricted
Subsidiary that is not a Re stricted Subsidiary on the Issue Date may enter into
a  Sale/Leaseback  Transaction with respect to property owned by such Restricted
Subsidiary, the proceeds of
which are used to acquire, develop,  construct, or repay (within 365 days of the
commencement of commercial operation of such Facility)  Indebtedness Incurred to
acquire, develop or construct, a new Facility of such Restricted Subsidiary,  as
long as neither the Company nor any other  Restricted  Subsidiary shall have any
obligation or liability in connection therewith.

SECTION 3.7 Limitation on Liens.

                  The  Company  shall not,  and shall not permit any  Restricted
Subsidiary to, directly or indirectly,  incur or permit to exist any Lien of any
nature  whatsoever  on any of its  properties  (including,  without  limitation,
Capital  Stock),  whether  owned at the  date of such  Indenture  or  thereafter
acquired,  other than (a) pledges or deposits made by such Person under workers'
compensation,  unemployment insurance laws or similar legislation, or good faith
deposits in connection with bids, tenders,  contracts (other than for payment of
Indebtedness)  or leases to which such Person is a party,  or deposits to secure
statutory or regulatory obligations of such Person or deposits of cash of United
States Gov ernment bonds to secure surety,  appeal or performance bonds to which
such Person is a party,  or deposits as security for  contested  taxes or import
duties or for the payment of rent, in each case Incurred in the ordinary  course
of business;  (b) Liens  imposed by law such as  carriers',  warehousemen's  and
mechanics'  Liens, in each case,  arising in the ordinary course of business and
with  respect  to  amounts  not yet due or  being  contested  in good  faith  by
appropriate legal pro ceedings promptly instituted and diligently  conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in  conformity  with GAAP shall have been made;  or other  Liens  arising out of
judgments or awards  against such Person with respect to which such Person shall
then be  diligently  prosecut ing appeal or other  proceedings  for review;  (c)
Liens for property  taxes not yet subject to penalties for  non-payment or which
are being contested in good faith and by appropriate legal proceedings  promptly
instituted and diligently conducted and for which a reserve or other appropriate
provision,  if any, as shall be required in conformity with GAAP shall have been
made;  (d) Liens in favor of issuers or surety bonds or letters of credit issued
pursuant to the  request of and for the  account of such Person in the  ordinary
course of its business;  provided,  however, that such letters of credit may not
constitute  Indebtedness;  (e)  minor  survey  exceptions,  minor  encumbrances,
easements or reservations  of, or rights of others for,  rights of way,  sewers,
electric  lines,  telegraph and telephone lines and other similar  purposes,  or
zoning  or  other  restrictions  as to  the  use of  real  properties  or  liens
incidental  to the conduct of the business of such Person or to the ownership of
its properties which were not Incurred in connection with
Indebtedness  or other  extensions  of credit and which do not in the  aggregate
materially  adversely  affect the value of said properties or materially  impair
their use in the  operation of the business of such Person;  (f) Liens  securing
Indebted ness Incurred to finance the  construction  or purchase of, or repairs,
improve  ments  or  additions  to,  property,   which  shall  include,   without
limitation,  Liens on the stock of the Restricted  Subsidiary that has purchased
or owns such property,  provided,  however,  that the Lien may not extend to any
other property owned by the Company or any Restricted Subsidiary at the time the
Lien is  incurred,  and the  Indebtedness  secured by the Lien may not be issued
more  than  270  days  after  the  later  of  the  acquisition,   completion  of
construction, repair, improvement, addition or commencement of full operation of
the property  subject to the Lien;  (g) Liens  existing on the Issue Date (other
than Liens relating to Indebtedness or other  obligations  being repaid or liens
that are otherwise extinguished with the proceeds of the Offering); (h) Liens on
property  or  shares  of stock of a Person  at the time  such  Person  becomes a
Subsidiary;  provided,  however,  that any such Lien may not extend to any other
property  owned  by the  Company  or any  Restricted  Subsidiary;  (i)  Liens on
property  at the  time  the  Company  or a  Subsidiary  acquires  the  property,
including any acquisition by means of a merger or consolidation with or into the
Company or a Subsidiary;  provided, however, that such Liens are not incurred in
connection  with,  or in  contemplation  of, such merger or  consolidation;  and
provided,  further,  that the Lien may not extend to any other property owned by
the Company or any Restricted  Subsidiary;  (j) Liens securing  Indebtedness  or
other  obligations  of a  Subsidiary  owing to the  Company  or a  Wholly  Owned
Subsidiary;  (k)  Liens  incurred  by a Person  other  than the  Company  or any
Subsidiary on assets that are the subject of a Capitalized  Lease  Obligation to
which the Company or a Subsidiary is a party;  provided,  however, that any such
Lien may not secure  Indebtedness  of the Company or any Subsid iary  (except by
virtue of clause (ix) of the definition of "Indebtedness") and may not extend to
any other property owned by the Company or any Restricted Subsidiary;  (l) Liens
incurred by a Restricted  Subsidiary on its assets to secure  Non-Recourse  Debt
Incurred  pursuant  to  Section  3.4(b)(vii),  provided  that  such  Lien (A) is
Incurred at the time of the initial Incurrence of such Indebtedness and (B) does
not  extend to any assets or  property  of the  Company or any other  Restricted
Subsidiary;  (m) Liens not in  respect  of  Indebtedness  arising  from Uni form
Commercial Code financing statements for informational purposes with re spect to
leases Incurred in the ordinary course of business and not otherwise pro hibited
by this Indenture;  (n) Liens not in respect of  Indebtedness  consisting of the
interest  of the  lessor  under any lease  Incurred  in the  ordinary  course of
business and not otherwise prohibited by this Indenture;  (o) Liens which consti
tute  banker's  liens,  rights of set-off or similar  rights and  remedies as to
deposit  accounts or other  funds  maintained  with any bank or other  financial
institution,  whether  arising by operation of law or pursuant to contract;  (p)
Liens to secure any refinancing,  refunding,  extension,  renewal or replacement
(or successive refinancings,  refundings,  extensions, renewals or replacements)
as a whole, or in part, of any  Indebtedness  secured by any Lien referred to in
the foregoing clauses (f), (g), (h) and (i),  provided,  however,  that (x) such
new Lien shall be limited to all or part of the same  property  that secured the
original Lien (plus  improvements  on such  property)  and (y) the  Indebtedness
secured  by such Lien at such  time is not  increased  (other  than by an amount
necessary  to  pay  fees  and  expenses,  including  premiums,  related  to  the
refinancing, refunding, extension, renewal or replacement of such Indebtedness);
and (q) Liens by which the Securities are secured equally and ratably with other
Indebtedness  pursuant to this Section 3.7; in any such case without effectively
providing  that the  Securities  shall be secured  equally and ratably  with (or
prior to) the  obligations  so secured  for so long as such  obligations  are so
secured;  provided,  however,  that the  Company may incur other Liens to secure
Indebtedness  as long as the sum of (x) the amount of  outstanding  Indebtedness
secured by Liens  incurred  pursuant to this proviso  plus (y) the  Attributable
Debt with respect to all outstanding  leases in connection  with  Sale/Leaseback
Transactions  entered into pursuant to the first proviso to Section 3.6 does not
exceed 10% of Consolidated Net Tangible Assets as determined with respect to the
Company as of the end of the most  recent  fiscal  quarter  for which  financial
statements are available.

SECTION 3.8 Change of Control.

                  In the  event of a Change of  Control  Triggering  Event,  the
Compa ny shall make an offer to  purchase  (the  "Change of Control  Offer") the
Securities then outstanding at a purchase price equal to one hundred one percent
(101%) of the principal amount  (excluding any premium) thereof plus accrued and
unpaid interest to the Change of Control Purchase Date (as defined below) on the
terms set forth in this Section.  The date on which the Company  shall  purchase
the Securities  pursuant to this Section (the "Change of Control Purchase Date")
shall be no  earlier  than 30 days,  nor later  than 60 days,  after the  notice
referred to below is mailed,  unless a longer  period  shall be required by law.
The Company shall notify the Trustee in writing promptly after the occurrence of
any Change of Control  Triggering Event of the Company's  obligation to offer to
purchase all of the Securities.

                  Notice of a Change  of  Control  Offer  shall be mailed by the
Company to the Holders of the Securities at their last registered  address (with
a
copy to the Trustee and the Paying Agent) within thirty (30) days after a Change
in Control  Triggering  Event has  occurred.  The Change of Control  Offer shall
remain  open  from the time of  mailing  until a date  not  more  than  five (5)
Business  Days  before the Change of Control  Purchase  Date.  The notice  shall
contain all  instructions  and  materials  necessary  to enable such  Holders to
tender Securities (in whole or in part) pursuant to the Change of Control Offer.
The notice,  which shall govern the terms of the Change of Control Offer,  shall
state:

                       (a)  that the Change of Control Offer is being made pursu
         ant to this Section;

                      (b)  the purchase price and the Change of Control Purchase
         Date;

                      (c)  that any Security not surrendered or accepted for pay
         ment will continue to accrue interest;

                           (d) that any Security  accepted for payment  pursuant
         to the Change of Control Offer shall cease to accrue interest after the
         Change of Control Purchase Date;

                           (e)  that  any  Holder  electing  to have a  Security
         purchased  (in whole or in part)  pursuant to a Change of Control Offer
         will be required to  surrender  the  Security,  with the form  entitled
         "Option of Holder to Elect  Purchase"  on the  reverse of the  Security
         completed,  to the Paying Agent at the address  specified in the notice
         (or  otherwise  make  effective  delivery of the  Security  pursuant to
         book-entry   procedures   and  the  related  rules  of  the  applicable
         depositories)  at least  five (5)  Business  Days  before the Change of
         Control Purchase Date; and

                           (f) that any Holder will be entitled to withdraw  his
         or her election if the Paying Agent receives,  not later than three (3)
         Business Days prior to the Change of Control Purchase Date, a telegram,
         telex,  facsimile  transmission or letter setting forth the name of the
         Holder,  the principal  amount of the Security the Holder delivered for
         purchase  and a statement  that such Holder is  withdrawing  his or her
         election to have the Security purchased.

                  On the Change of Control  Purchase Date, the Company shall (i)
accept for payment Securities or portions thereof surrendered and properly
tendered,  and not  withdrawn,  pursuant  to the Change of Control  Offer,  (ii)
deposit with the Paying Agent, no later than 11:00 a.m.  eastern  standard time,
money, in immediately  available funds,  sufficient to pay the purchase price of
all Securities or portions thereof so accepted and (iii) deliver to the Trustee,
no later than 11:00 a.m. eastern standard time,  Securities so accepted together
with an Officers'  Certificate  stating that such  Securities have been accepted
for payment by the Company.  The Paying Agent shall  promptly,  and in any event
within one (1) Business  Day  following  the deposit and  delivery  specified in
clauses (ii) and (iii) of the immediately preceding sentence, mail or deliver to
Holders of Securi ties so accepted  payment in an amount  equal to the  purchase
price.  Holders whose  Securities  are purchased only in part will be issued new
Securities  equal  in  principal  amount  to  the  unpurchased  portion  of  the
Securities surrendered.

                  The Company shall comply, to the extent  applicable,  with the
requirements of Section 14(e) of the Exchange Act and any other  securities laws
or regulations in connection with the repurchase of Securities  pursuant to this
Section. To the extent that the provisions of any securities laws or regulations
conflict  with  provisions  of this  Section,  the Company shall comply with the
appli  cable  securities  laws and  regulations  and shall not be deemed to have
breached its obligations under this Section by virtue thereof.

SECTION 3.9 Compliance Certificate.

                  The  Company  shall,  within  120 days after the close of each
fiscal year following the issuance of the  Securities,  file with the Trustee an
Officer's Certificate, provided that one Officer executing the same shall be the
principal  executive officer,  the principal  financial officer or the principal
accounting officer of the Company, covering the period from the date of issuance
of the  Securities  to the end of the fiscal year in which the  Securities  were
issued,  in the case of the first such  certificate,  and covering the preceding
fiscal year in the case of each subsequent  certificate,  and stating whether or
not, to the knowledge of each such executing  Officer,  the Company has complied
with and performed  and  fulfilled  all covenants on its part  contained in this
Indenture and is not in default in the  performance  or observance of any of the
terms or  provisions  contained in this  Indenture,  and, if any such signer has
obtained knowledge of any default by the Company in the performance,  observance
or  fulfillment  of any such covenant,  term or provision  specifying  each such
default and the nature thereof.  For the purpose of this Section 3.9, compliance
shall be determined  without regard to any grace period or requirement of notice
provided pursuant to the terms of this Indenture.

SECTION 3.10 SEC Reports.

                  The Company shall,  to the extent  required by TIA Sec 314(a),
file with the Trustee,  within 15 days after the filing with the SEC,  copies of
the annual  reports  and of the  information,  documents  and other  reports (or
copies  of such  portions  of any of the  foregoing  as the SEC may by rules and
regulations  prescribe)  which  the  Company  is  required  to file with the SEC
pursuant to Section 13 or 15(d) of the Exchange Act. In the event the Company is
at any time no longer  subject to the  reporting  requirements  of Section 13 or
15(d) of the  Exchange  Act,  it  shall,  for so long as the  Securities  remain
outstanding,  file with the Trustee and the SEC and mail to each  Securityholder
at such  Securityholder's  registered address,  within 15 days after the Company
would have been  required  to file such  documents  with the SEC,  copies of the
annual  reports and of the  information,  documents  and other reports which the
Company  would  have  been  required  to file  with the SEC if the  Company  had
continued  to be subject to such  Sections 13 or 15(d).  The Company  also shall
comply with the other provisions of TIA Sec 314(a).

SECTION 3.11 Transactions with Affiliates.

                  The  Company  shall not,  and shall not permit any  Restricted
Subsidiary to,  directly or indirectly,  enter into,  permit to exist,  renew or
extend any transaction or series of transactions (including, without limitation,
the sale, purchase, exchange or lease of any assets or property or the rendering
of any services)  with any Affiliate of the Company unless (i) the terms of such
transac tion or series of transactions  are (A) no less favorable to the Company
or such Restricted Subsidiary, as the case may be, than would be obtainable in a
compa  rable  transaction  or series of  related  transactions  in  arm's-length
dealings  with an  unrelated  third party and (B) set forth in writing,  if such
transaction   or  series  of   transactions   involve   aggregate   payments  or
consideration in excess of $1,000,000, and (ii) with respect to a transaction or
series of  transactions  involving  the sale,  purchase,  lease or  exchange  of
property or assets having a value in excess of $5,000,000,  such  transaction or
series of  transactions  has been  approved by a majority  of the  disinterested
members of the Board of Directors or, if there are no  disinterested  members of
the Board of  Directors,  the  Board of  Directors  of the  Company  shall  have
received a written opinion of a nationally  recognized  investment  banking firm
stating that such  transaction or series of  transactions is fair to the Company
or such  Restricted  Subsidiary  from a financial  point of view.  The foregoing
provisions do not prohibit (i) the payment of reasonable fees to
directors  of the  Company and its  subsidiaries  who are not  employees  of the
Company or its  subsidiaries;  (ii) any  transaction  between  the Company and a
Wholly Owned Subsidiary or between Wholly Owned Subsidiaries otherwise
permitted by the terms of the Indenture; (iii) the payment of any Restricted Pay
ment which is expressly  permitted to be paid pursuant to Section  3.3(b);  (iv)
any issuance of securities or other reasonable  payments,  awards or grants,  in
cash or  otherwise,  pursuant  to, or the  funding of,  employment  arrangements
approved by the Board of  Directors;  (v) the grant of stock  options or similar
rights to employ ees and directors of the Company  pursuant to plans approved by
the Board of Di rectors;  (vi) loans or advances to  employees  in the  ordinary
course of business;  (vii) any  repurchase,  redemption  or other  retirement of
Capital  Stock of the  Company  held by  employees  of the Company or any of its
Subsidiaries upon death,  disability or termination of employment at a price not
in excess of the fair market value  thereof  approved by the Board of Directors;
(viii) any  transaction  between or among the Company and any  Subsidiary in the
ordinary  course of business and  consistent  with past practices of the Company
and its Subsidiaries; (ix) payments pursuant to Existing Agreements and payments
of principal,  interest and commitment fees under the Bank Credit Agreement; and
(x) any agreement to do any of the  foregoing.  Any  transaction  which has been
determined,  in the  written  opinion of an  independent  nationally  recognized
investment  banking  firm,  to be fair,  from a financial  point of view, to the
Company  or the  applicable  Restricted  Subsidiary  shall  be  deemed  to be in
compliance with this Section.

SECTION 3.12 Sales of Assets.

                  (a) Neither the Company nor any  Restricted  Subsidiary  shall
consummate any Asset Sale unless (i) the Company or such  Restricted  Subsidiary
receives consideration at the time of such Asset Sale at least equal to the fair
market value,  as  determined  in good faith by the Board of  Directors,  of the
shares  or  assets  subject  to  such  Asset  Sale,  (ii)  at  least  60% of the
consideration  thereof received by the Company or such Restricted  Subsidiary is
in the form of cash or cash equivalents  which are promptly  converted into cash
by the Person  receiving  such  payment and (iii) an amount equal to 100% of the
Net Available  Cash is applied by the Company (or such  Subsidiary,  as the case
may be) as set forth  herein.  The  Company  shall not permit  any  Unrestricted
Subsidiary to make any Asset Sale unless such Unrestricted  Subsidiary  receives
consideration  at the time of such Asset Sale at least  equal to the fair market
value of the shares or assets so disposed of as  determined in good faith by the
Board of Directors.

                  (b)  Within three hundred sixty-five (365) days (such 365 days
being the "Application Period") following the consummation of an Asset Sale, the
Company or such  Restricted  Subsidiary  shall apply the Net Available Cash from
such  Asset Sale as  follows:  (i)  first,  to the  extent  the  Company or such
Restrict ed Subsidiary  elects,  to reinvest in Additional  Assets (including by
means of an investment in Additional Assets by a Restricted  Subsidiary with Net
Available Cash received by the Company or another Restricted  Subsidiary);  (ii)
second,  to the  extent  of  the  balance  of  such  Net  Available  Cash  after
application  in accor dance with  clause  (i),  and to the extent the Company or
such  Restricted  Subsid  iary elects (or is required by the terms of any Senior
Indebtedness  or any Indebt edness of such  Restricted  Subsidiary),  to prepay,
repay or purchase Senior  Indebtedness  (other than  Securities) or Indebtedness
(other than any Preferred Stock) of a Restricted  Subsidiary (in each case other
than  Indebtedness  owed to the Company or an Affiliate of the  Company);  (iii)
third, to the extent of the balance of such Net Available Cash after application
in accordance  with clauses (i) and (ii),  and to the extent the Company or such
Restricted  Subsidiary elects, to purchase  Securities;  and (iv) fourth, to the
extent of the balance of such Net Available Cash after application in accordance
with  clauses  (i),  (ii) and  (iii),  to make an offer to  purchase  Securities
pursuant to and subject to the conditions of Section 3.12(c); provided, however,
that in connection  with any  prepayment,  repayment or purchase of Indebtedness
pursuant to clause  (ii),  (iii) or (iv) above,  the Company or such  Restricted
Subsidiary shall retire such  Indebtedness and cause the related loan commitment
(if any) to be permanently reduced in an amount equal to the principal amount so
prepaid, repaid or purchased. To the extent that any Net Available Cash from any
Asset  Sale  remains  after  the  applica  tion of such  Net  Available  Cash in
accordance  with this paragraph,  the Company or such Restricted  Subsidiary may
utilize such remaining Net Available Cash in any manner not otherwise prohibited
by the Indenture.

                  To the extent that any or all of the Net Available Cash of any
Foreign Asset Sale is  prohibited or delayed by applicable  local law from being
repatriated  to the United  States,  the portion of such Net  Available  Cash so
affect ed shall not be required to be applied at the time  provided  above,  but
may be retained by the  applicable  Restricted  Subsidiary so long,  but only so
long, as the  applicable  local law will not permit  repatriation  to the United
States (the Compa ny hereby  agreeing to promptly  take or cause the  applicable
Restricted  Subsidiary to promptly take all actions  required by the  applicable
local law to permit such  repatriation).  Once such  repatriation of any of such
affected Net Available Cash is permitted  under the  applicable  local law, such
repatriation  shall be immediately  effected and such  repatriated Net Available
Cash will be applied  in the  manner set forth in this  Section as if such Asset
Sale had occurred on the date of such repatriation.
                  Notwithstanding the foregoing, to the extent that the Board of
Directors determines,  in good faith, that repatriation of any or all of the Net
Available  Cash of any  Foreign  Asset Sale would  have a material  adverse  tax
consequence  to the Company,  the Net Available Cash so affected may be retained
outside of the United States by the applicable Restricted Subsidiary for so long
as such material adverse tax consequence would continue.

                  Notwithstanding  the  foregoing,  this Section shall not apply
to, or prevent any sale of assets, property, or Capital Stock of Subsidiaries to
the extent that the fair market value (as  determined in good faith by the Board
of Directors) of such asset,  property or Capital Stock,  together with the fair
market value of all other assets,  property,  or Capital  Stock of  Subsidiaries
sold,  transferred  or  otherwise  disposed of in Asset Sales  during the twelve
month period preceding the date of such sale, does not exceed 5% of Consolidated
Net  Tangible  Assets  as  determined  as of the end of the most  recent  fiscal
quarter for which financial statements are available,  (it being understood that
this  provision  shall only apply with  respect to the fair market value of such
asset,  property or Capital Stock in excess of 5% of  consolidated  Net Tangible
Assets),  and no violation of this provision shall be deemed to have occurred as
a consequence thereof.

                  In the event of the  transfer  of  substantially  all (but not
all) of the  property  and assets of the Company as an entirety to a Person in a
transaction  permitted  under  Article IV, the  Successor  Corporation  shall be
deemed to have sold the  properties and assets of the Company not so transferred
for purposes of this Section 3.12,  and shall comply with the provisions of this
Section 3.12 with respect to such deemed sale as if it were an Asset Sale.

                  (c)  Subject to the last  sentence of this  paragraph,  in the
event of an Asset Sale that  requires  the  purchase of  Securities  pursuant to
clause  (iii) of the first  paragraph  of Section  3.12(b),  the Company will be
required to purchase Securities tendered pursuant to an offer by the Company for
the  Securities  (the "Asset Sale  Offer") at a purchase  price of not less than
their principal  amount plus accrued interest to the Asset Sale Purchase Date in
accordance   with  the   procedures   (including   proration  in  the  event  of
oversubscription)  set forth in Section 3.12(d). If the aggregate purchase price
of  Securities  tendered  pursuant  to the Asset Sale Offer is less than the Net
Available  Cash allotted to the pur chase of the  Securities,  the Company shall
apply the remaining Net Available  Cash in accordance  with the last sentence of
the first  paragraph of Section  3.12(b).  The Company  shall not be required to
make an Asset Sale Offer for
Securities pursuant to this Section if the Net Available Cash available therefor
(after  application of the proceeds as provided in Section  3.12(b)(i) and (ii))
is less than  $1,000,000  for any  particular  Asset Sale (which lesser  amounts
shall not be carried  forward for purposes of determining  whether an Asset Sale
Offer is required  with respect to the Net  Available  Cash from any  subsequent
Asset Sale).

                  (d) (1)  Promptly,  and in any  event  prior to the  360th day
after the later of the date of each Asset Sale as to which the Company must make
an Asset Sale Offer or the receipt of Net Available Cash therefrom,  the Company
shall be obligated to deliver to the Trustee and send,  by  first-class  mail to
each  Holder,  a written  notice  stating  that the Holder may elect to have his
Securities  purchased  by the  Company  either in whole or in part  (subject  to
proration  as  hereinafter  described  in the  event  the  Asset  Sale  Offer is
oversubscribed)  in integral  multiples  of $1,000 of principal  amount,  at the
applicable  purchase  price.  The notice shall  specify a purchase date not less
than 30 days,  nor more than 60 days,  after the date of such notice (the "Asset
Sale Purchase Date") and shall contain the information  required in a notice for
a Change of Control Offer, to the extent applicable.

                  (2) Not later  than the date upon which  written  notice of an
Asset Sale Offer is  delivered  to the  Trustee as provided  below,  the Company
shall  deliver to the Trustee an Officers'  Certificate  as to (i) the amount of
the Asset Sale Offer (the "Asset Sale Offer Amount"), (ii) the allocation of the
Net Avail able Cash from the Asset Sales pursuant to which such Asset Sale Offer
is being made and (iii) the compliance of such allocation with the provisions of
Section  3.12(a).  On such date,  the Company  shall also  deposit with a Paying
Agent (or, if the Company is acting as its own Paying Agent,  segregate and hold
in trust) funds in an amount equal to the Asset Sale Offer Amount to be held for
payment in accordance  with the provisions of this Section.  Upon the expiration
of the period for which the Asset Sale Offer remains open (the "Offer  Period"),
the  Company  shall  deliver,  or  cause to be  delivered,  to the  Trustee  the
Securities or portions  thereof which have been properly  tendered to and are to
be accepted by the Company. Paying Agent shall promptly, and in any event within
one (1) Business Day  following the Asset Sale  Purchase  Date,  mail or deliver
payment to each  tendering  Holder in the amount of the purchase  price.  In the
event that the aggregate purchase price of the Securities  delivered,  or caused
to be delivered, by the Company to the Trustee is less than the Asset Sale Offer
Amount,  the Paying  Agent shall  deliver the excess to the Company  immediately
after the  expiration of the Offer Period and the delivery to the Trustee of the
Securities,  or portions thereof that have been properly  tendered to and are to
be accepted for payment by the Company.
                  (3)  Holders  electing  to have a Security  purchased  will be
required to surrender the Security,  with the form entitled "Option of Holder to
Elect Purchase" on the reverse of the Security duly completed, to the Company or
the Paying Agent,  as specified in, and at the address  specified in, the notice
at least ten Business Days prior to the Asset Sale Purchase  Date.  Holders will
be  entitled  to withdraw  their  election  if the  Trustee or the Paying  Agent
receives,  not later than three  Business  Days prior to the Asset Sale Purchase
Date, a telegram, telex, facsimile transmission or letter setting forth the name
of the Holder,  the  principal  amount of the Security  which was  delivered for
purchase  by the Holder and a  statement  that such  Holder is  withdrawing  his
election to have such  Security  purchased.  If at the  expiration  of the Offer
Period the  aggregate  principal  amount of  Securities  surrendered  by Holders
exceeds the Asset Sale Offer Amount,  the Company shall select the Securities to
be  purchased  on a pro rata  basis  (with  such  adjustments  as may be  deemed
appropriate by the Company so that only Securi ties in  denominations of $1,000,
or integral multiples thereof,  shall be purchased) and shall notify the Trustee
of its selection in a writing signed by two Officers.  Holders whose  Securities
are  purchased  only in part will be issued new  Securities  equal in  principal
amount to the unpurchased portion of the Securities surren dered.

                  (4) At the time the Company delivers Securities to the Trustee
which  are to be  accepted  for  purchase,  the  Company  will also  deliver  an
Officers'  Certificate  stating that such  Securities  are to be accepted by the
Company  pursu  ant to and in  accordance  with  the  terms of this  Section.  A
Security  shall be deemed to have been  accepted  for  purchase  at the time the
Paying Agent,  directly or through an agent,  mails or delivers payment therefor
to the surrendering Holder.

                  (e) The Company shall comply, to the extent  applicable,  with
the  requirements of Section 14(e) of the Exchange Act and any other  securities
laws or regulations in connection with the repurchase of Securities  pursuant to
this  Section.  To the extent  that the  provisions  of any  securities  laws or
regulations  conflict with provisions of this Section,  the Company shall comply
with the appli cable  securities laws and regulations and shall not be deemed to
have breached its obligations under this Section by virtue thereof.

SECTION 3.13 Corporate Existence.

                  Except as permitted under Article IV, the Company shall do or
cause to be done all things  necessary  to  preserve  and keep in full force and
effect its corporate  existence and the corporate  existence of each  Restricted
Subsidiary in accordance  with the  respective  organizational  documents of the
Company  and  of  each  Restricted   Subsidiary  and  the  rights  (charter  and
statutory),   licenses  and   franchises  of  the  Company  and  the  Restricted
Subsidiaries necessary or appropri ate to carry out their businesses;  provided,
however,  that the Company  shall not be  required  to preserve  any such right,
license or franchise,  or the corporate existence of any Restricted  Subsidiary,
if the  preservation  thereof  is no  longer  desirable  in the  conduct  of the
business of the Company and the Restricted  Subsidiaries  taken as a whole;  and
provided,  further,  that any Restricted Subsid iary may consolidate with, merge
into, or sell, convey,  transfer,  lease or other wise dispose of all or part of
its  property and assets to the Company or any Wholly  Owned  Subsidiary  to the
extent otherwise permitted under this Indenture.

SECTION 3.14 Payment of Taxes and Other Claims.

                  The  Company  shall pay or  discharge,  or cause to be paid or
discharged,  before any material  penalty  accrues  thereon all material  taxes,
assessments and  governmental  charges levied or imposed upon the Company or any
Restricted Subsidiary or upon the income, profits or property of the Compa ny or
any  Restricted  Subsidiary;  provided,  however,  that the Company shall not be
required to pay or discharge,  or cause to be paid or discharged,  any such tax,
assessment,  charge or claim the amount,  applicability  or validity of which is
being contested in good faith by appropriate  proceedings and for which adequate
reserves, if the same shall be required in accordance with GAAP, have been made.

SECTION 3.15 Notice of Defaults and Other Events.

                  In the  event  that any  Indebtedness  of the  Company  or any
Signifi cant Subsidiary having an outstanding  principal amount of $1,000,000 or
more individually or $2,500,000 or more in the aggregate has been or could be de
clared due and payable  before its  maturity  because of the  occurrence  of any
event of default  under such  Indebtedness  (including  any  Default  under this
Indenture),  the Company,  promptly  after it becomes aware  thereof,  will give
written notice thereof to the Trustee.

SECTION 3.16 Maintenance of Properties and Insurance.

                  The Company shall cause all  properties  used or useful in the
conduct of its  business  or the  business  of each  Restricted  Subsidiary  and
material to the Company and the Restricted  Subsidiaries  taken as a whole to be
maintained and kept in normal  condition,  repair and working order and supplied
with all necessary equipment;  provided,  however,  that nothing in this Section
3.16 shall prevent the Company or any Restricted  Subsidiary from  discontinuing
the use,  operation or maintenance of any of such properties or disposing of any
of them,  if such  discontinuance  or disposal is, in the judgment of an Officer
(or other employee of the Company or any  Restricted  Subsidiary) of the Company
or such Restricted  Subsidiary  having  managerial  responsibility  for any such
property, appropriate.

                  The Company shall provide or cause to be provided,  for itself
and   the   Restricted    Subsidiaries,    insurance   (including    appropriate
self-insurance)  against loss or damage of the kinds customarily insured against
by corporations  similarly situated and owning like properties,  including,  but
not limited to, product liability  insurance and public liability insurance with
reputable insurers or with the government of the United States of America, or an
agency or instrumen  tality thereof,  of such kinds,  and in such amounts,  with
such  deductibles  and by  such  methods  as the  Company  in good  faith  shall
determine to be reasonable and appropriate in the circumstances.

SECTION 3.17              Limitation on Issuance of Capital Stock and Incurrence
                           of Indebtedness of Restricted Subsidiaries.

                  The  Company  shall  not  permit  any  Restricted  Subsidiary,
directly or indirectly,  to issue or sell, and shall not permit any Person other
than the Company or a Wholly Owned  Subsidiary to own (except to the extent that
any such  Person  may own on the Issue  Date),  any  shares  of such  Restricted
Subsidiary's  Capital  Stock  (including  options,  warrants or other  rights to
purchase shares of Capital Stock) except,  to the extent otherwise  permitted by
the Inden ture, (i) to the Company or another  Restricted  Subsidiary  that is a
Wholly Owned  Subsidiary of the Company,  or (ii) if,  immediately  after giving
effect to such issuance and sale,  such  Restricted  Subsidiary  would no longer
constitute a Restricted  Subsidiary  for  purposes of the  Indenture;  provided,
however,  that a  Restricted  Subsidiary  that has an interest in a Facility may
sell shares of NonConvertible Stock that is not Preferred Stock if, after giving
effect to such sale,
the Company or a Wholly Owned  Subsidiary  continues to hold at least a majority
of each class of Capital Stock of such Restricted Subsidiary.  The Company shall
not  permit  any  Restricted  Subsidiary,   directly  or  indirectly,  to  Incur
Indebtedness other than pursuant to Section 3.4(b).

SECTION 3.18 Limitation on Changes in the Nature of the Business.

                  The  Company  and its  Subsidiaries  shall  engage only in the
business of acquiring, constructing, managing, developing, improving, owning and
operating Facilities,  as well as any other activities reasonably related to the
foregoing activities  (including acquiring and holding reserves),  including but
not limited to investing in Facilities; provided that up to 10% of the Company's

Consolidated total assets may be used in Unrelated  Businesses without constitut
ing a violation of this Section.  In addition,  the Company will, and will cause
its  Subsidiaries,  to conduct their respective  businesses in a manner so as to
maintain the exemption of the Company and its  Subsidiaries  from treatment as a
public  utility  holding  company  under PUHCA or an electric  utility or public
utility under any federal, state or local law; provided,  however, to the extent
that any such law is  amended  following  the Issue  Date in such a manner  that
would (absent  application  of this proviso) make  compliance  with this Section
3.18 result in a material adverse effect on the Company's  results of operations
or financial  condition,  then the Company  shall not be required to comply with
this  Section  3.18,  but only to the extent of actions or  failures to act that
would  (absent  application  of  this  proviso)  constitute  violations  of this
Covenant solely as a result of such amendment.

SECTION 3.19 Limitation on Subsidiary Investments.

                  The Company will not permit any Subsidiary with an interest in
a Facility  to make any  investment  in or merge with any other  person  with an
interest  in a power  generation  facility  or,  except in  connection  with the
acquisi tion of Related Assets by such Subsidiary, in an Unrelated Business.


                                   ARTICLE IV

                         CONSOLIDATION, MERGER AND SALE

SECTION 4.1  Merger and Consolidation of Company.

                  The  Company  shall not in a single  transaction  or through a
series of related transactions  consolidate with or merge with or into any other
corpora tion or sell, assign, convey,  transfer or lease or otherwise dispose of
all or  substantially  all of its  properties  and assets as an  entirety to any
Person or group of affiliated Persons, unless:

                           (i) either (A) the  Company  shall be the  continuing
         Person,  or (B) the Person (if other than the  Company)  formed by such
         consolida  tion or into  which  the  Company  is merged or to which the
         properties  and assets of the  Company as an entirety  are  transferred
         (the  "Successor  Corporation")  shall be a  corporation  organized and
         existing  under the laws of the United  States or any State  thereof or
         the District of Columbia and shall  expressly  assume,  by an indenture
         supplemental hereto, executed and delivered to the Trustee, in form and
         substance  reasonably  satisfactory to the Trustee, all the obligations
         of the Company under this Indenture and the Securities;

                           (ii) immediately  before and immediately after giving
         effect to such  transaction  on a pro forma  basis  (and  treating  any
         Indebtedness  which  becomes  an  obligation  of the  Company  (or  the
         Successor  Corpora  tion if the Company is not the  continuing  obligor
         under this Indenture) or any Restricted  Subsidiary as a result of such
         transaction  as having been Incurred by such Person at the time of such
         transaction), no Default shall have occurred and be continuing;

                           (iii) the Company shall have delivered,  or caused to
         be delivered,  to the Trustee an Officers' Certificate and, as to legal
         matters, an Opinion of Counsel,  each in form and substance  reasonably
         satisfactory  to the Trustee,  each  stating  that such  consolidation,
         merger or transfer  and such  supplemental  indenture  comply with this
         Indenture  and  that  all  conditions  precedent  herein  provided  for
         relating to such transaction have been complied with;

                           (iv)   immediately   after  giving   effect  to  such
         transaction on a pro forma basis (and treating any  Indebtedness  which
         becomes an obliga tion of the Company (or the Successor  Corporation if
         the Company is not the  continuing  obligor under this  Indenture) or a
         Restricted  Subsidiary  in  connection  with  or as a  result  of  such
         transaction  as having been Incurred by such Person at the time of such
         transaction),  the Company (or the Successor Corporation if the Company
         is  not  the  continuing  obligor  under  this  Indenture)  shall  have
         Consolidated  Net  Worth  in an  amount  which  is not  less  than  the
         Consolidated  Net  Worth  of the  Company  immediately  prior  to  such
         transaction; and

                           (v)   immediately   after   giving   effect  to  such
         transaction on a pro forma basis (and treating any  Indebtedness  which
         becomes an obliga tion of the Company (or the Successor  Corporation if
         the Company is not the  continuing  obligor  under the  Indenture) or a
         Restricted  Subsidiary  in  connection  with  or as a  result  of  such
         transaction  as having been Incurred by such Person at the time of such
         transaction),  the Consolidated  Cover age Ratio of the Company (or the
         Successor  Corporation  if the  Company is not the  continuing  obligor
         under the  Indenture)  is at least  1.10:1,  or, if less,  equal to the
         Consolidated  Coverage  Ratio of the Company immedi ately prior to such
         transaction;  provided that, if the Consolidated  Coverage Ratio of the
         Company  before giving effect to such  transaction  is within the range
         set forth in column (A) below, then the pro forma Consolidated Coverage
         Ratio of the Company (or the  Successor  Corporation  if the Company is
         not the continuing obligor under the Indenture) shall be at least equal
         to the lesser of (1) the ratio determined by multiplying the percentage
         set forth in column (B) below by the Consolidated Coverage Ratio of the
         Company prior to such transaction and (2) the ratio set forth in column
         (C) below:

         (A)                                                        (B)     (C)

     1.11:1 to 1.99:1.........................................      100%   1.6:1
     2.00:1 to 2.99:1.........................................       90%   2.1:1
     3.00:1 to 3.99:1.........................................       80%   2.4:1
     4.00:1 or more...........................................       70%   2.5:1


                Notwithstanding the foregoing paragraphs (ii), (iv) and (v), any
Restricted Subsidiary (other than a Subsidiary having an interest in a Facility)
may consolidate  with,  merge into or transfer all or part of its properties and
assets  to  the  Company  or  any  Wholly  Owned   Subsidiary  or  Wholly  Owned
Subsidiaries  (other than a Subsidiary or Subsidiaries which have an interest in
a Facility) and no violation of this Section shall be deemed to have occurred as
a consequence  thereof,  as long as the requirements of paragraphs (i) and (iii)
are satisfied in connection therewith.

SECTION 4.2 Successor Substituted.

                  (a) Upon any such  consolidation or merger, or any conveyance,
transfer, or disposition of all or substantially all of the properties or assets
of the Company in  accordance  with Section 4.1, but not in the case of a lease,
the Successor  Corporation  shall succeed to and be substituted  for the Company
under this  Indenture and the  Securities,  and the Company  shall  thereupon be
released  from all  obligations  hereunder  and  under  the  Securities  and the
Company, as the predecessor corporation, may thereupon or at any time thereafter
be dissolved,  wound up or liquidated.  The Successor  Corporation thereupon may
cause to be signed,  and may issue  either in its own name or in the name of the
Company, all or any of the Securities issuable hereunder which theretofore shall
not have been signed by the Company and delivered to the Trustee;  and, upon the
order of the Successor Corporation instead of the Company and subject to all the
terms,  conditions and  limitations  prescribed in this  Indenture,  the Trustee
shall  authenti  cate and shall  deliver  any  Securities  which  the  Successor
Corporation thereafter shall cause to be signed and delivered to the Trustee for
that purpose.  All the  Securities so issued shall in all respects have the same
legal rank and benefit under this  Indenture as the  Securities  theretofore  or
thereafter  issued in accor dance with the terms of this Indenture as though all
such Securities had been issued at the date of the execution hereof.

                  (b) In the  case  of any  consolidation,  merger  or  transfer
described in Section  4.2(a) above,  such changes in form (but not in substance)
may be made in the Securities thereafter to be issued as may be appropriate.

                                    ARTICLE V

                              DEFAULTS AND REMEDIES

SECTION 5.1 Events of Default.

                  An "Event of Default" means any of the following events:

                           (a)  default  in  the  payment  of  interest  on  any
         Security  when the  same  becomes  due and  payable,  and such  default
         continues for a period of 30 days;

                           (b)  default in the payment of the  principal  of any
         Security when the same becomes due and payable at maturity or otherwise
         or a failure to redeem or purchase Securities when required pursuant to
         this Indenture or the Securities;

                           (c) default in performance of any other  covenants or
         agree  ments  in the  Securities  or this  Indenture  and  the  default
         continues  for 30 days after the date on which  written  notice of such
         default is given to the  Company by the  Trustee or to the  Company and
         the  Trustee  by  Holders  of at least 25% in  principal  amount of the
         Securities then outstanding hereun der;

                           (d) there shall have occurred either (i) a default by
         the Company or any Subsidiary under any instrument or instruments under
         which there is or may be secured or evidenced any  Indebtedness  of the
         Company or any  Subsidiary of the Company  (other than the  Securities)
         having an  outstanding  principal  amount of $2,000,000 (or its foreign
         currency equivalent) or more individually or $5,000,000 (or its foreign
         currency  equivalent)  or more in the  aggregate  that has  caused  the
         holders  thereof to declare  such  Indebtedness  to be due and  payable
         prior to its Stated  Maturity  or (ii) a default by the  Company or any
         Subsidiary  in the  payment  when due of any  portion of the  principal
         under any such instru ment, and such unpaid portion exceeds  $2,000,000
         (or its foreign currency equivalent) individually or $5,000,000 (or its
         foreign currency  equivalent) in the aggregate and is not paid, or such
         default is not cured or  waived,  within  any grace  period  applicable
         thereto,  unless such Indebtedness is dis charged within 20 days of the
         Company or a Restricted Subsidiary becom

                                        7




         ing aware of such default; provided, however, that the foregoing shall 
         not apply to any default on Non-Recourse Indebtedness;

                           (e) any  final  judgment  or order  (not  covered  by
         insurance)  for the  payment of money  shall be  rendered  against  the
         Company  or any  Significant  Subsidiary  in an  amount  in  excess  of
         $2,000,000  (or  its  foreign  currency  equivalent)   individually  or
         $5,000,000  (or its foreign  currency  equivalent) in the aggregate for
         all such final  judgments or orders against all such Persons  (treating
         any  deductibles,  self-insurance  or  retention as not so covered) and
         shall  not  be  discharged,  and  there  shall  be  any  period  of  30
         consecutive  days  following  entry of the final  judgment  or order in
         excess of $2,000,000 (or its foreign currency equivalent)  individually
         or that causes the  aggregate  amount for all such final  judgments  or
         orders  outstanding  against all such Persons to exceed  $5,000,000 (or
         its foreign currency  equivalent) during which a stay of enforcement of
         such  final  judgment  or  order,  by  reason  of a  pending  appeal or
         otherwise, shall not be in effect;

                      (f)  the Company or any Significant Subsidiary pursuant to
         or within the meaning of any Bankruptcy Law:

                           (i)  commences a voluntary case,

                (ii)  consents to the entry of an order for relief against it in
                           an involuntary case,

                (iii)  consents to the appointment of a Custodian of it or for
                           all or substantially all of its property,

                (iv)  makes a general assignment for the benefit of its credi
                           tors, or

                 (v)  admits in writing its inability to generally pay its debts
                           as such debts become due;

         or takes any comparable action under any foreign laws relating to insol
vency;

                           (g) a court of competent jurisdiction enters an order
         or decree under any Bankruptcy Law that:
                    (i)  is for relief against the Company or any Significant
                         Subsidiary in an involuntary case,

                    (ii)  appoints a Custodian of the Company or any Significant
                  Subsidiary or for all or substantially all of its property, or

                    (iii)  orders the winding up or liquidation of the Company
                          or any Significant Subsidiary;

or any similar relief is granted under any foreign laws; and the order or decree
remains unstayed and in effect for 60 days.

                  The term  "Bankruptcy Law" means Title 11 of the United States
Code or any  similar  Federal or State law for the relief of  debtors.  The term
"Custodian"  means  any  receiver,  trustee,  assignee,  liquidator  or  similar
official under any Bankruptcy Law.

                  Any notice of Default given by the Trustee or  Securityholders
under this  Section  must  specify the  Default,  demand that it be remedied and
state that the notice is a "Notice of Default."

                  The Company shall deliver to the Trustee, within 30 days after
the  occurrence  thereof,  written  notice of any event which with the giving of
notice  or the lapse of time or both  would  become  an Event of  Default  under
clause (c), (d), (e) or (g) hereof.

                  Subject to the  provisions of Section 6.1 and 6.2, the Trustee
shall not be  charged  with  knowledge  of any Event of Default  unless  written
notice  thereof shall have been given to the Trustee by the Company,  the Paying
Agent, any Holder or an agent of any Holder.

SECTION 5.2  Acceleration.

                  If an  Event  of  Default  (other  than an  Event  of  Default
specified  in clause (f) and (g) of  Section  5.1 with  respect to the  Company)
occurs and is continuing,  the Trustee by notice to the Company,  or the Holders
of at least 25% in principal  amount of the  Securities by notice to the Company
and the Trustee, may declare the principal of and accrued and unpaid interest on
all the Securities to be due and payable.  Upon such  declaration  the principal
and interest shall be
due and payable  immediately.  If an Event of Default specified in clause (f) or
(g) of Section 5.1 with  respect to the Company  occurs,  the  principal  of and
interest on all the Securities  shall ipso facto become and be  immediately  due
and payable  without any  declaration or other act on the part of the Trustee or
any  Securityholders.  The  Holders of a  majority  in  principal  amount of the
Securities  by  notice  to the  Trustee  may  rescind  an  acceleration  and its
consequences  if the  rescission  would not conflict with any judgment or decree
and if all  existing  Events  of  Default  have  been  cured  or  waived  except
nonpayment  of principal or interest  that has become due solely  because of the
acceleration.  No such rescis sion shall affect any  subsequent or other Default
or Event of Default or impair any consequent right.

SECTION 5.3 Other Remedies.

                  If an Event of Default occurs and is  continuing,  the Trustee
may pursue any available  remedy to collect the payment of principal or interest
on  the  Securities  or to  enforce  the  performance  of any  provision  of the
Securities or this Indenture.

                  The  Trustee  may  maintain a  proceeding  even if it does not
possess any of the Securities or does not produce any of them in the proceeding.
A delay or omission by the Trustee or any Securityholder in exercising any right
or remedy accruing upon an Event of Default shall not impair the right or remedy
or constitute a waiver of or acquiescence in the Event of Default.  All remedies
are cumulative to the extent permitted by law.

SECTION 5.4 Waiver of Past Defaults.

                  The  Holders  of  a  majority  in  principal   amount  of  the
Securities  by  notice to the  Trustee  may waive an  existing  Default  and its
consequences except (a) a Default in the payment of the principal of or interest
on any  Security or (b) a Default in respect of a provision  that under  Section
8.2 cannot be amended without the consent of each Securityholder  affected. When
a Default is waived,  it is deemed cured, but no such waiver shall extend to any
subsequent or other Default or Event of Default or impair any consequent right.

SECTION 5.5 Control by Majority.

                  The  Holders  of  a  majority  in  principal   amount  of  the
Securities  may direct the time,  method and place of conducting  any proceeding
for any
remedy  available to the Trustee or exercising  any trust or power  conferred on
it. However,  the Trustee may refuse to follow any direction that conflicts with
law or this Indenture,  or, subject to Section 6.1, that the Trustee  determines
is unduly prejudicial to the rights of other  Securityholders,  or would involve
the Trustee in personal liability;  provided, however, that the Trustee may take
any other action deemed proper by the Trustee that is not inconsistent with such
direction.  Prior to taking any action hereunder,  the Trustee shall be entitled
to  indemnification  reasonably  satisfactory to it against all risk, losses and
expenses caused by taking or not taking such action. Subject to Section 6.1, the
Trustee  shall be under no  obligation  to exercise  any of the rights or powers
vested  in  it  by  this   Indenture   at  the  request  or   direction  of  the
Securityholders  pursuant to this Indenture,  unless such Securityholders  shall
have provided to the Trustee security or indemnity reasonably satisfactory to it
against  the  costs,  expenses  and  liabilities  which  might  be  incurred  in
compliance with such request or direction.

SECTION 5.6 Limitation on Suits.

                  A  Securityholder  may  pursue a remedy  with  respect to this
Inden ture or the Securities only if:

                        (a)  the Holder gives to the Trustee written notice of a
         continuing Event of Default;

                     (b)  the Holders of at least 25% in principal amount of the
         Securities make a written request to the Trustee to pursue the remedy;

                      (c)  such Holder or Holders offer to the Trustee security
       reasonably satisfactory to it or indemnity against any loss, liability or
         expense;

                           (d) the  Trustee  does not  comply  with the  request
         within 60 days after  receipt of the  request and the offer of security
         or indemnity; and

                           (e) the Holders of a majority in principal  amount of
         the  Securities do not give the Trustee a direction  inconsistent  with
         the request during such 60-day period.

                  A  Securityholder  may not use this Indenture to prejudice the
rights of another  Securityholder  or to obtain a  preference  or priority  over
another Securityholder. SECTION 5.7 Rights of Holders To Receive Payment.

                  Notwithstanding  any other  provision of this  Indenture,  the
right of any Holder of a Security to receive  payment of principal  and interest
on the Security, on or after the respective due dates expressed in the Security,
or to  bring  suit for the  enforcement  of any such  payment  on or after  such
respective  dates,  shall not be impaired or affected without the consent of the
Holder.

SECTION 5.8 Collection Suit by Trustee.

                  If an Event of  Default  specified  in  Section  5.1(a) or (b)
occurs and is continuing,  the Trustee may recover  judgment in its own name and
as trustee of an express  trust  against  the  Company  for the whole  amount of
principal and interest  remaining  unpaid (together with interest on such unpaid
interest to the extent lawful) and the amounts provided for in Section 6.7.

SECTION 5.9  Trustee May File Proofs of Claim.

                  The Trustee may file such proofs of claim and other  papers or
documents and take such other  actions  including  participating  as a member or
otherwise  in any  committees  of  creditors  appointed  in the matter as may be
necessary or advisable in order to have the claims of the Trustee (including any
claim for the amounts provided in Section 6.7) and the  Securityholders  allowed
in any  judicial  proceedings  relative to the  Company,  its  creditors  or its
property and, unless  prohibited by law or applicable  regulations,  may vote on
behalf of the Holders in any election of a trustee in bankruptcy or other Person
performing similar functions,  and any Custodian in any such judicial proceeding
is hereby  authorized by each Holder to make payments to the Trustee and, in the
event that the Trustee shall consent to the making of such payments  directly to
the  Holders,  to  pay to the  Trustee  any  amount  due it for  the  reasonable
compensation,  ex penses,  disbursements and advances of the Trustee, its agents
and its counsel, and any other amounts due the Trustee under Section 6.7. To the
extent that the pay ment of any such amount due to the Trustee under Section 6.7
out of the estate in any such proceeding shall be denied for any reason, payment
of the same shall be secured by a Lien on, and shall be paid out of, any and all
distributions,  divi dends,  money,  securities and other  properties  which the
Holders of the Securities may be entitled to receive in such proceeding  whether
in liquidation or under any plan of reorganization or arrangement or otherwise.

SECTION 5.10  Priorities.

                  If the Trustee collects any money pursuant to this Article, it
shall pay out the money in the following order:

                  First: to the Trustee for amounts due under Section 6.7;

                  Second: to Securityholders for amounts due and unpaid on the
       Securities for principal, premium, if any, and interest, ratably, without
         preference or priority of any kind, according to the amounts due and
         payable on the Securities for principal and interest, respectively; and

                  Third: to the Company.

                  The Trustee  may fix a record  date and  payment  date for any
payment to  Securityholders  pursuant to this  Section.  At least 15 days before
such record date, the Company shall give written  notice to each  Securityholder
and the Trustee of the record date, the payment date and amount to be paid.

SECTION 5.11 Undertaking for Costs.

                  In any suit for the  enforcement  of any right or remedy under
this  Indenture  or in any suit  against  the  Trustee  for any action  taken or
omitted by it as Trustee,  a court in its  discretion  may require the filing by
any party  litigant in the suit of an  undertaking to pay the costs of the suit,
and the  court  in its  discre  tion  may  assess  reasonable  costs,  including
reasonable  attorneys' fees,  against any party litigant in the suit, having due
regard to the merits and good faith of the claims or defenses  made by the party
litigant.  This  Section  does not apply to a suit by the  Trustee,  a suit by a
Holder  pursuant  to  Section  5.7,  or a suit by  Holders  of more  than 10% in
principal amount of the Securities.

SECTION 5.12 Waiver of Stay or Extension Laws.

                  The Company shall not at any time insist upon, or plead, or in
any manner  whatsoever  claim or take the benefit or  advantage  of, any stay or
exten sion law wherever  enacted,  now or at any time hereafter in force,  which
may affect the covenants or the performance of this  Indenture;  and the Company
hereby expressly waives all benefit or advantage of any such law, and shall not
hinder,  delay or impede  the  execution  of any  power  herein  granted  to the
Trustee, but shall suffer and permit the execution of every such power as though
no such law had been enacted.


                                   ARTICLE VI

                                     TRUSTEE

SECTION 6.1 Duties of Trustee.

                  (a) If an Event of Default has occurred and is continuing, the
Trustee  shall  exercise  such of the  rights  and  powers  vested in it by this
Indenture,  and use the same  degree of care and skill in their  exercise,  as a
prudent Person would exercise or use under the  circumstances  in the conduct of
his own affairs.

                  (b)  Except during the continuance of an Event of Default:

                           (i) The Trustee  need  perform only those duties that
         are  specifically  set forth in this  Indenture  and no  others  and no
         implied  covenants  or  obligations  shall be read into this  Indenture
         against the Trustee.

                           (ii) In the  absence  of bad faith on its  part,  the
         Trustee may  conclusively  rely, as to the truth of the  statements and
         the correctness of the opinions expressed therein, upon certificates or
         opinions furnished to the Trustee and conforming to the requirements of
         this  Indenture.  Howev er, the Trustee shall examine the  certificates
         and  opinions  to  determine   whether  or  not  they  conform  to  the
         requirements of this Indenture.

                  (c) The Trustee may not be relieved from liability for its own
negligent  action,  its  own  negligent  failure  to  act,  or its  own  willful
misconduct, except that:

                  (i)  This paragraph does not limit the effect of paragraph (b)
         of this Section.

                           (ii) The Trustee shall not be liable for any error of
         judg ment made in good  faith by a Trust  Officer,  unless it is proved
         that the Trustee was negligent in ascertaining the pertinent facts.

                           (iii) The Trustee shall not be liable with respect to
         any action it takes or omits to take in good faith in accordance with a
         direction received by it pursuant to Section 5.2, 5.4 or 5.5.

                           (iv) No provision of this Indenture shall require the
         Trustee  to  expend  or risk  its own  funds  or  otherwise  incur  any
         financial  liability in the performance of any of its duties hereunder,
         or in the  exercise of any of its rights or powers,  unless it receives
         indemnity  satisfactory  to it against  any risk,  loss,  liability  or
         expense.

                  (d) Every  provision of this Indenture that in any way relates
to the Trustee is subject to paragraphs (a), (b) and (c) of this Section.

                  (e) The Trustee,  in its capacity as Trustee and Registrar and
Paying Agent,  shall not be liable to the Company,  the  Securityholders  or any
other  Person for  interest  on any money  received  by it,  including,  but not
limited to, money with  respect to  principal of or interest on the  Securities,
except as the Trustee may agree with the Company.

                  (f) Money held in trust by the Trustee need not be  segregated
from other funds except to the extent required by law.

SECTION 6.2 Rights of Trustee.

                  (a) The Trustee may rely on any document  reasonably  believed
by it to be genuine and to have been signed or presented  by the proper  Person.
The Trustee need not investigate any fact or matter stated in the document.

                  (b) Before the Trustee acts or refrains  from  acting,  it may
require an  Officers'  Certificate,  an Opinion of Counsel or both.  The Trustee
shall not be liable  for any  action it takes or omits to take in good  faith in
reliance on any such Officers' Certificate or Opinion of Counsel.

                  (c) The  Trustee  may act  through  agents  and  shall  not be
responsi ble for the  misconduct or negligence of any agent  appointed  with due
care.

                  (d) The Trustee shall not be liable for any action it takes or
omits to take in good faith  which it believes  to be  authorized  or within its
rights  or  powers  provided,  however,  that  the  Trustee's  conduct  does not
constitute wilful misconduct, negligence or bad faith.
                  (e) The Trustee may consult with counsel of its selection, and
the  advice or  opinion  of such  counsel as to matters of law shall be full and
complete  authorization  and protection  from liability in respect of any action
taken,  omitted or suffered by it hereunder in good faith and in accordance with
the advice of such counsel.

                  (f)  The  Trustee   shall  not  be   obligated   to  make  any
investigation  into the facts or matters stated in any resolution,  certificate,
statement,  instru ment, opinion, report, notice, request,  direction,  consent,
order, bond, debenture or any other paper or document.

SECTION 6.3 Individual Rights of Trustee.

                  The Trustee in its individual or any other capacity may become
the owner or pledgee of Securities and may otherwise deal with the Company or an
Affiliate  with the same rights it would have if it were not Trustee.  Any Agent
may do the same with like  rights.  However,  the Trustee is subject to Sections
6.10 and 6.11.

SECTION 6.4 Trustee's Disclaimer.

                  The  Trustee  shall  not  be  responsible  for  and  makes  no
representa  tion  as to the  validity  or  adequacy  of  this  Indenture  or the
Securities,  it shall not be  accountable  for the Company's use of the proceeds
from the  Securities,  and it shall not be responsible  for any statement in the
Securities  other than its authenti  cation.  The Trustee  shall have no duty to
ascertain  or inquire  as to the  perfor  mance of the  Company's  covenants  in
Article III hereof.

SECTION 6.5 Notice of Defaults.

                  If a Default or an Event of Default  occurs and is  continuing
and if it is actually known to a Trust Officer of the Trustee, the Trustee shall
mail to  Securityholders  a notice of the Default or Event of Default  within 90
days after a Trust Officer of the Trustee has actual knowledge of the occurrence
thereof.  Except in the case of a Default in any  payment on any  Security,  the
Trustee  may  withhold  the  notice if and so long as a  committee  of its Trust
Officers  in  good  faith  determines  that  withholding  the  notice  is in the
interests of Securityholders.

SECTION 6.6 Reports by Trustee to Holders.

                  Within 60 days  after the  reporting  date  stated in  Section
10.10, the Trustee shall mail to Securityholders a brief report dated as of such
date that complies with TIA Sec 313(a) if required by that Section.  The Trustee
also shall comply with TIA Sec 313(b)(2).

                  A  copy  of  each  report  at  the  time  of  its  mailing  to
Securityholders shall be filed with the SEC and each stock exchange on which the
Securities are listed.  The Company shall  promptly  notify the Trustee when the
Securities are listed on any stock exchange and of any delisting thereof.

SECTION 6.7 Compensation and Indemnity.

                  The Company  shall pay to the  Trustee  from time to time such
compensation for its services as the parties shall agree. The Trustee's compensa
tion shall not be limited by any law on  compensation of a trustee of an express
trust.  The Company shall  reimburse the Trustee upon request for all reasonable
out-of-pocket disbursements, expenses and advances incurred by it. Such expenses
shall include the reasonable  compensation and out-of-pocket  disburse ments and
expenses of the Trustee's agents and counsel.

                  The  Company  shall  indemnify  the Trustee  for,  and hold it
harmless  against,  any  loss,   liability  or  expense,   including  reasonable
attorneys' fees, disbursements and expenses, incurred by it arising out of or in
connection  with the  administration  of this trust and the  performance  of its
duties  hereunder  including the costs and expenses of defending  itself against
any claim or liability in connection  with the exercise or performance of any of
its powers or duties hereunder. The Trustee shall notify the Company promptly of
any claim for which it may seek  indemnity.  Failure by the Trustee to so notify
the Company  shall not relieve the  Company of its  obligations  hereunder.  The
Company shall defend the claim and the Trustee  shall  cooperate in the defense.
The Trustee may have separate  counsel and the Company shall pay the  reasonable
fees and expens es of such counsel.  The Company need not pay for any settlement
made without its consent, which consent shall not be unreasonably withheld.

                  The  Company  need not  reimburse  any  expense  or  indemnify
against any loss or liability  incurred by the Trustee through negligence or bad
faith.

                  To secure the Company's  payment  obligations in this Section,
the Trustee  shall have a Lien prior to the  Securities on all money or property
held or collected by the Trustee, except that held in trust to pay principal and
interest on particular Securities.

                  When the Trustee incurs expenses or renders  services after an
Event of Default specified in Section 5.1(f) or (g) occurs, the expenses and the
compensation  for the services are  intended to  constitute  expenses of adminis
tration under any Bankruptcy Law.

                  The Company's  obligations under this Section 6.7 and any Lien
arising  hereunder shall survive the resignation or removal of the Trustee,  the
discharge of the Company's obligations pursuant to Article VII of this Indenture
and the termination of this Indenture.

SECTION 6.8 Replacement of Trustee.

                  A resignation  or removal of the Trustee and  appointment of a
successor  Trustee  shall become  effective  only upon the  successor  Trustee's
acceptance of appointment as provided in this Section.

                  The  Trustee  may  resign  at any  time  by so  notifying  the
Company. The Holders of a majority in principal amount of the Securities may, by
written  notice to the Trustee,  remove the Trustee by so notifying  the Trustee
and the Company. The Company, by notice to the Trustee, shall remove the Trustee
if:

                  (a)  the Trustee fails to comply with Section 6.10;

                  (b)  the Trustee is adjudged a bankrupt or an insolvent;

                  (c)  a receiver or public officer takes charge of the Trustee 
or its property; or

                  (d)  the Trustee becomes incapable of acting.

                  If the Trustee resigns or is removed or if a vacancy exists in
the office of Trustee  for any  reason,  the Company  shall  promptly  appoint a
successor Trustee. Within one year after the successor Trustee takes office, the
Holders  of a majority  in  principal  amount of the  Securities  may  appoint a
successor Trustee to replace the successor Trustee appointed by the Company.
                  If a successor  Trustee  does not take  office  within 60 days
after the retiring  Trustee  resigns or is removed,  the retiring  Trustee,  the
Company or the Holders of at least 10% in principal amount of the Securities may
petition any court of competent  jurisdiction for the appointment of a successor
Trustee.

                  If  the  Trustee  fails  to  comply  with  Section  6.10,  any
Securityholder may petition any court of competent  jurisdiction for the removal
of the Trustee and the appointment of a successor Trustee.

                  A successor Trustee shall deliver a written  acceptance of its
appointment  to the retiring  Trustee and to the Company.  Thereupon the resigna
tion  or  removal  of the  retiring  Trustee  shall  become  effective,  and the
successor  Trustee  shall have all the rights,  powers and duties of the Trustee
under  this  Indenture.  The  successor  Trustee  shall  mail  a  notice  of its
succession to Securityholders.  The retiring Trustee shall promptly transfer all
property  held by it as Trustee to the  successor  Trustee,  subject to the Lien
provided for in Section 6.7.

SECTION 6.9  Successor Trustee by Merger, etc.

                  If the  Trustee  consolidates,  merges or  converts  into,  or
transfers all or  substantially  all of its corporate trust business to, another
corporation,  the  successor  corporation  without  any further act shall be the
successor Trustee.

SECTION 6.10 Eligibility; Disqualification.

                  This  Indenture  shall always have a Trustee who satisfies the
requirements  of TIA Sec  310(a)(1).  The Trustee  shall  always have a combined
capital and surplus of at least  $50,000,000 as set forth in its most recent pub
lished annual report of condition. The Trustee shall comply with TIA Sec 310(b).
Nothing  herein  shall  prevent  the  Trustee  from  filing  with  the  SEC  the
application referred to in the second-to-last paragraph of TIA Sec 310(b).

SECTION 6.11  Preferential Collection of Claims Against Company.

                  The Trustee  shall  comply  with TIA Sec  311(a),  except with
respect to any creditor relationship listed in TIA Sec 311(b). A Trustee who has
resigned or been removed is subject to TIA Sec 311(a) to the extent indicated.

                                                ARTICLE VII

                                  SATISFACTION AND DISCHARGE OF INDENTURE

SECTION 7.1 Discharge of Liability on Securities; Defeasance.

                  If (i) the Company  delivers  to the  Trustee all  outstanding
Securities  (other  than  Securities  replaced  pursuant  to  Section  2.9)  for
cancellation or (ii) all outstanding  Securities have become due and payable and
the Company irrevoca bly deposits with the Trustee as trust funds solely for the
benefit of the Holders for that purpose funds  sufficient to pay at maturity the
principal of and all accrued interest on all outstanding  Securities (other than
Securities  replaced pursuant to Section 2.9), and if in either case the Company
pays all other sums payable hereunder by the Company,  then, subject to Sections
7.2 and 7.7, this  Indenture  shall cease to be of further  effect.  The Trustee
shall acknowledge  satisfaction and discharge of this Indenture on demand of the
Company  accompa nied by an Officers'  Certificate and an Opinion of Counsel and
at the cost and expense of the Company.

SECTION 7.2 Termination of Company's Obligations.

                  Except as otherwise  provided in this Section 7.2, the Company
may terminate its obligations under the Securities and this Indenture if:

                  (i) the  Securities  mature within one year or all of them are
to be called for redemption within one year under  arrangements  satisfactory to
the Trustee for giving the notice of  redemption,  (ii) the Company  irrevocably
depos its in trust with the Trustee or Paying Agent (other than the Company or a
Subsidiary or Affiliate of the Company) under the terms of an irrevocable  trust
agreement in form and  substance  satisfactory  to the  Trustee,  as trust funds
solely for the benefit of the Holders for that purpose, money or U.S. Government
Obli  gations  that,  through the payment of interest  and  principal in respect
thereof in  accordance  with its  terms,  will  provide,  not later than one (1)
Business Day prior to the  applicable  payment date,  money  sufficient  (in the
opinion  of a  nationally  recognized  firm of  independent  public  accountants
expressed in a written certif ication thereof delivered to the Trustee), without
consideration of any reinvest ment of interest, to pay principal and interest on
the  Securities  to maturity or  redemption,  as the case may be, and to pay all
other sums payable by it hereun der, (iii) no Default shall have occurred and be
continuing on the date of such
deposit,  (iv) such deposit will not result in or constitute a Default or result
in a breach or violation of, or constitute a default under,  any other agreement
or in  strument  to which the Company is a party or by which it is bound and (v)
the Company has delivered to the Trustee an Officers' Certificate and an Opinion
of Counsel,  in each case stating  that all  conditions  precedent  provided for
herein  relating to the  satisfaction  and discharge of this Indenture have been
complied  with;  provided  that the  Trustee  or Paying  Agent  shall  have been
irrevocably  instructed  to  apply  such  money  or the  proceeds  of such  U.S.
Government  Obligations  to the  payment of such  principal  and  interest  with
respect to the Secu rities.

                  With respect to the  foregoing,  the Company's  obligations in
Sections 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9,  2.14,  3.1, 3.2, 6.7, 6.8, 7.5
and  7.6  shall  survive  until  the  Securities  are  no  longer   outstanding.
Thereafter,  only the Company's  obligations  in Sections 6.7, 6.8 and 7.6 shall
survive.  After  any such  irrevocable  deposit  and  fulfillment  of the  other
requirements of this Section 7.2, the Trustee upon request shall  acknowledge in
writing the discharge of the Company's obligations under the Securities and this
Indenture except for those surviving obligations specified above.

SECTION 7.3 Defeasance and Discharge of Indenture.

                  The Company will be deemed to have paid and will be discharged
from any and all obligations in respect of the Securities on the 123rd day after
the date of the deposit referred to in clause (i) hereof,  and the provisions of
this  Indenture will no longer be in effect with respect to the  Securities,  in
each case  subject to the  penultimate  paragraph  of this  Section 7.3, and the
Trustee,  at the reasonable request of and at the expense of the Company,  shall
execute proper in struments  acknowledging  the same, except as to (a) rights of
registration of transfer and exchange, (b) substitution of apparently mutilated,
defaced, de stroyed, lost or stolen Securities, (c) rights of Holders to receive
payments  of  principal  thereof  and  interest   thereon,   (d)  the  Company's
obligations under Section 3.2, (e) the rights, obligations and immunities of the
Trustee hereunder including, without limitation, those arising under Section 6.7
hereof,  (f) the rights of the Holders as  beneficiaries  of this Indenture with
respect to the property so deposited  with the Trustee  payable to all or any of
them and (g) the rights, obligations and immunities which survive as provided in
the  penultimate  para graph of this Section 7.3;  provided  that the  following
conditions shall have been satisfied:

                           (i) with  reference  to this Section 7.3, the Company
         has  irrevocably  deposited or caused to be irrevocably  deposited with
         the Trustee (or another  trustee  satisfying the requirement of Section
         6.10) or Paying  Agent  (other  than the  Company  or a  Subsidiary  or
         Affiliate of the  Company)  and conveyed all right,  title and interest
         for the benefit of the Holders, under the terms of an irrevocable trust
         agreement in form and  substance  satisfactory  to the Trustee as trust
         funds in trust,  specifically  pledged as security  for, and  dedicated
         solely  to,  the  benefit  of the  Holders,  in and to, (A) money in an
         amount,  (B) U.S.  Government  Obligations that, through the payment of
         interest and  principal  in respect  thereof in  accordance  with their
         terms,  will  provide,  not later than one  Business Day before the due
         date of any payment  referred to in this clause (i), money in an amount
         or (C) a combination thereof in an amount sufficient, in the opinion of
         a  nationally   recognized  firm  of  independent   public  accountants
         expressed in a written  certification thereof delivered to the Trustee,
         to pay and discharge,  without  consideration  of any  reinvestment  of
         interest  and after  payment of all  federal,  state and local taxes or
         other fees,  charges and  assessments in respect thereof payable by the
         Trustee  or  Paying  Agent,  the  principal  of  and  interest  on  the
         outstanding  Securities  when due;  provided that the Trustee or Paying
         Agent shall have been irrevo  cably  instructed  to apply such money or
         the  proceeds of such U.S.  Gov ernment  Obligations  to the payment of
         such principal and interest with respect to the Securities;

                           (ii) such deposit will not result in or  constitute a
         Default or result in a breach or violation  of, or constitute a default
         under,  any other  agreement  or  instrument  to which the Company is a
         party or by which it is bound;

                           (iii)  no  Default   shall  have   occurred   and  be
         continuing  on the date of such deposit or during the period  ending on
         the 123rd day after such date of deposit;

                           (iv) the Company shall have  delivered to the Trustee
         (A) either  (1) a ruling  directed  to the  Trustee  received  from the
         Internal  Revenue  Service  to the  effect  that the  Holders  will not
         recognize  income,  gain or loss for federal  income tax  purposes as a
         result of the  Company's  exercise of its option under this Section 7.3
         and will be subject to federal income tax on the same amount and in the
         same manner and at the same
         times as would have been the case if such option had not been exercised
         or (2) an  Opinion of Counsel  (who may not be an  employee  of the Com
         pany)  to the  same  effect  as the  ruling  described  in  clause  (1)
         accompanied  by a  ruling  to that  effect  published  by the  Internal
         Revenue  Service,  unless  there  has been a change  in the  applicable
         federal  income  tax law since the date of this  Indenture  such that a
         ruling from the Internal  Revenue Service is no longer required and (B)
         an  Opinion  of Counsel  to the  effect  that (1) the  creation  of the
         defeasance  trust does not violate the Investment Com pany Act of 1940,
         (2) after the passage of 123 days following the deposit  (except,  with
         respect  to any trust  funds for the  account  of any Holder who may be
         deemed to be an "insider" for purposes of Title 11 of the United States
         Code,  after one year following the deposit),  the trust funds will not
         be subject to the effect of Section 547 of the United States Bankruptcy
         Code or Section 15 of the New York  Debtor and  Creditor  Law in a case
         commenced  by or against the Company  under  either such  statute,  and
         either (x) the trust  funds will no longer  remain the  property of the
         Compa ny (and  therefore,  will not be  subject  to the  effect  of any
         applicable  bankruptcy,  insolvency,  reorganization  or  similar  laws
         affecting  creditors'  rights generally) or (y) if a court were to rule
         under  any such  law in any case or  proceeding  that the  trust  funds
         remained  property  of the  Company,  (I)  assuming  such  trust  funds
         remained in the possession of the Trustee prior to such court ruling to
         the extent not paid to Holders,  the Trustee will hold, for the benefit
         of the Holders,  a valid and perfected  security interest in such trust
         funds that is not avoidable in  bankruptcy or otherwise  except for the
         effect  of  Section  552(b) of the  United  States  Bankruptcy  Code on
         interest on the trust funds accruing after the  commencement  of a case
         under such  statute  and (II) the  Holders  will be entitled to receive
         adequate  protection  of their  interests  in such trust  funds if such
         trust funds are used in such case or proceeding; and

                           (v) the  Company  has  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel,  in each case stating
         that all condi  tions  precedent  provided  for herein  relating to the
         defeasance contemplated by this Section 7.3 have been complied with.

                  Notwithstanding  the foregoing clause (i), prior to the end of
the 123-day period referred to in clause (iv)(B)(2) above, none of the Company's
obligations  under this Indenture shall be discharged.  Subsequent to the end of
such 123-day period with respect to this Section 7.3, the Company's  obligations
in Sections 2.2, 2.3,  2.4, 2.5, 2.6, 2.7, 2.8, 2.9,  2.14,  3.1, 3.2, 6.7, 6.8,
7.6
and 7.7 shall survive until the Securities are no longer outstanding.  
Thereafter, only the Company's obligations in Sections 6.7, 7.6 and 7.7 
shall survive.  If and
when a ruling from the Internal Revenue Service or Opinion of Counsel referred
to in clause (iv(A) above is able to be provided specifically without regard to,
and not in reliance upon, the continuance of the Company's obligations under
Section 3.1, then the Company's obligations under such Section 3.1 shall cease
upon delivery to the Trustee of such ruling or Opinion of Counsel and compliance
with the other conditions precedent provided for herein relating to the 
defeasance contemplated by this Section 7.3.

                  After any such irrevocable  deposit and the fulfillment of the
other  requirements  of  this  Section  7.3,  the  Trustee  upon  request  shall
acknowledge  in writing the  discharge of the  Company's  obligations  under the
Securities  and this  Indenture  except for those  surviving  obligations in the
immediately preceding paragraph.

SECTION 7.4 Defeasance of Certain Obligations.

                  The  Company may omit to comply  with any term,  provision  or
condition  set forth in clauses  (iv) and (v) of Section  4.1 and  Sections  3.3
through 3.19, and clause (c) of Section 5.1 with respect to clauses (iv) and (v)
of Section 4.1 and Section 3.3 through 3.19,  and clauses (d) and (e) of Section
5.1 shall be deemed not to be Events of  Default,  in each case with  respect to
the outstanding Securities if:

                           (i) with  reference  to this Section 7.4, the Company
         has  irrevocably  deposited or caused to be irrevocably  deposited with
         the Trustee (or another trustee  satisfying the requirements of Section
         6.10) or Paying  Agent  (other  than the  Company  or a  Subsidiary  or
         Affiliate of the  Company)  and conveyed all right,  title and interest
         for the benefit of the Holders, under the terms of an irrevocable trust
         agreement in form and  substance  satisfactory  to the Trustee as trust
         funds in trust,  specifically  pledged as security  for, and  dedicated
         solely  to,  the  benefit  of the  Holders,  in and to, (A) money in an
         amount,  (B) U.S.  Government  Obligations that, through the payment of
         interest and  principal  in respect  thereof in  accordance  with their
         terms,  will  provide,  not later than one  Business Day before the due
         date of any payment  referred to in this clause (i), money in an amount
         or (C) a combination thereof in an amount,  sufficient,  in the opinion
         of a  nationally  recognized  firm of  independent  public  accountants
         expressed in a written  certification thereof delivered to the Trustee,
         to pay
         and  discharge,  without  consideration  of the  reinvestment  of  such
         interest  and after  payment of all  federal,  state and local taxes or
         other fees,  charges and  assessments in respect thereof payable by the
         Trustee  or  Paying  Agent,  the  principal  of  and  interest  on  the
         outstanding  Securities  when due;  provided that the Trustee or Paying
         Agent shall have been irrevocably instructed to apply such money or the
         proceeds  of such U.S.  Government  Obligations  to the payment of such
         principal and interest with respect to the Securities;

                           (ii) such deposit will not result in or  constitute a
         Default or result in a breach or violation  of, or constitute a default
         under,  any other  agreement  or  instrument  to which the Company is a
         party or by which it is bound;

                      (iii)  no Default shall have occurred and be continuing on
         the date of such deposit;

                           (iv) the  Company  has  delivered  to the  Trustee an
         Opinion of Counsel  who is not  employed  by the  Company to the effect
         that (A) the  creation  of the  defeasance  trust does not  violate the
         Investment   Company  Act  of  1940,  (B)  the  Holders  have  a  valid
         first-priority  security  interest in the trust funds,  (C) the Holders
         will not recognize income, gain or loss for federal income tax purposes
         as a result of such deposit and defeasance of certain  obligations  and
         will be  subject to  federal  income tax on the same  amount and in the
         same  manner  and at the same times as would have been the case if such
         deposit and  defeasance  had not  occurred and (D) after the passage of
         123 days following the deposit (except, with respect to any trust funds
         for the account of any Holder who may be deemed to be an "insider"  for
         purposes of the United States Bankruptcy Code, after one year following
         the  deposit),  the trust  funds  will not be  subject to the effect of
         Section 547 of the United States  Bankruptcy  Code or Section 15 of the
         New York Debtor and Creditor Law in a case  commenced by or against the
         Company under either such statute,  and either (1) the trust funds will
         no longer remain the property of the Company (and  therefore,  will not
         be  subject  to the effect of any  applicable  bankruptcy,  insolvency,
         reorganiza tion or similar laws affecting  creditors' rights generally)
         or (2) if a court  were to  rule  under  any  such  law in any  case or
         proceeding that the trust funds remained  property of the Company,  (x)
         assuming  such trust funds  remained in the  possession  of the Trustee
         prior to such  court  ruling to the  extent  not paid to  Holders,  the
         Trustee will hold, for the benefit of the
         Holders,  a valid and perfected  security  interest in such trust funds
         that is not avoidable in bankruptcy or otherwise  except for the effect
         of Section 552(b) of the United States  Bankruptcy  Code on interest on
         the trust funds  accruing after the  commencement  of a case under such
         statute  and (y) the  Holders  will be  entitled  to  receive  adequate
         protection  of their  interests in such trust funds if such trust funds
         are used in such case or proceeding; and

                           (v) the  Company  has  delivered  to the  Trustee  an
         Officers'  Certificate and an Opinion of Counsel,  in each case stating
         that all condi  tions  precedent  provided  for herein  relating to the
         defeasance contemplated by this Section 7.4 have been complied with.

SECTION 7.5 Application of Trust Money.

                  Subject  to  Section  7.7 of this  Indenture,  the  Trustee or
Paying Agent shall hold in trust money or U.S. Government  Obligations deposited
with it pursuant to Section 7.2, 7.3 or 7.4 of this  Indenture,  as the case may
be,  and shall  apply the  deposited  money and the money  from U.S.  Government
Obliga tions in  accordance  with this  Indenture to the payment of principal of
and interest on the  Securities.  The Trustee  shall be under no  obligation  to
invest such money or U.S. Government Obligations except as it may agree with the
Company and in no event shall the Trustee have any liability  for, or in respect
of, any such investment made as agreed with the Company.

SECTION 7.6 Repayment to Company.

                  Subject to Sections 6.7,  7.2, 7.3 and 7.4 of this  Indenture,
the Trustee and the Paying Agent shall  promptly pay to the Company upon written
request  any  excess  money  held by them at any  time  and  thereupon  shall be
relieved  from all  liability  with  respect to such money.  The Trustee and the
Paying  Agent shall pay to the Company  upon  written  request any money held by
them for the payment of principal or interest  that  remains  unclaimed  for two
years; provided,  however, that the Company shall if requested by the Trustee or
the Paying Agent, give the Trustee or such Paying Agent  indemnification  reason
ably  satisfactory  to it against any and all liability which may be incurred by
it by reason of such payment;  and provided,  further,  that the Trustee or such
Paying Agent before being required to make any payment may cause to be published
at the request and expense of the Company once in a newspaper of general circula
tion in the City of New York or mail to each Holder entitled to such money at
such  Holder's  address as set forth in the Security  Register  notice that such
money remains  unclaimed and that after a date specified therein (which shall be
at least 30 days from the date of such  publication  or mailing)  any  unclaimed
balance  of such  money  then  remaining  will be repaid to the  Company.  After
payment to the Company,  Holders entitled to such money must look to the Company
for payment as general  creditors  unless an applicable law  designates  another
person,  and all  liability of the Trustee and such Paying Agent with respect to
such money shall cease.

SECTION 7.7  Reinstatement.

                  If the Trustee or Paying Agent is unable to apply any money or
U.S.  Government  Obligations in accordance with Section 7.2, 7.3 or 7.4 of this
Indenture, as the case may be, by reason of any legal proceeding or by reason of
any order or judgment of any court or governmental authority enjoining, restrain
ing or otherwise  prohibiting such application,  the Company's obligations under
this Indenture and the  Securities  shall be revived and reinstated as though no
deposit had occurred  pursuant to Section 7.2, 7.3 or 7.4 of this Indenture,  as
the case may be,  until such time as the Trustee or Paying Agent is permitted to
apply all such money or U.S.  Government  Obligations in accordance with Section
7.2, 7.3 or 7.4 of this  Indenture,  as the case may be;  provided  that, if the
Company has made any  payment of  principal  of or  interest  on any  Securities
because of the reinstatement of its obligations, the Company shall be subrogated
to the rights of the Holders of such Securities to receive such payment from the
money or U.S. Government Obligations held by the Trustee or Paying Agent.


                                  ARTICLE VIII

                           AMENDMENTS AND SUPPLEMENTS

SECTION 8.1 Without Consent of Holders.

                  The Company and the  Trustee may amend this  Indenture  or the
Securities or enter into an indenture or indentures  supplemental  hereto (which
shall conform to the  provisions  of the Trust  Indenture Act as then in effect)
without  notice to or the consent of any  Securityholder  for one or more of the
following purposes:

                           (a)  to cure any ambiguity, omission, defect or
         inconsistency;
                           (b)  to comply with Article IV;

                           (c)  to  provide  for  uncertificated  Securities  in
         addition  to  certificated  Securities;  provided,  however,  that  the
         uncertificated Securities are issued in registered form for purposes of
         Section 163(f) of the Internal Revenue Code of 1986, as amended,  or in
         a manner  such that the  uncertificated  Securities  are  described  in
         Section 163(f)(2)(B) of the Code;

                    (d)  to add additional guarantees with respect to the Securi
         ties or to secure the Securities;

                     (e)  to add to the covenants of the Company for the benefit
         of the Holders or to surrender any right or power herein conferred upon
         the Company;

                         (f)  to comply with the requirements of the SEC in con
         nection with qualification of the Indenture under the TIA;

                      (g)  to make any change that does not adversely affect the
         rights of any Securityholder; or

                           (h)  to  provide  for  the  issuance  of   additional
         Securities in an aggregate  principal amount not to exceed $75,000,000;
         provided,  howev er,  the  aggregate  principal  amount  of  Securities
         outstanding at any time may not exceed $275,000,000.

                  After an amendment or  supplement  under this Section  becomes
effective, the Company shall mail to Securityholders a notice briefly describing
such  amendment  or  supplement.   The  failure  to  give  such  notice  to  all
Securityholders,  or any defect therein, shall not impair or affect the validity
of an amendment or supplement under this Section.

SECTION 8.2 With Consent of Holders.

                  The  Company  and the  Trustee  may amend or  supplement  this
Indenture  or the  Securities  with the  written  consent  of the  Holders  of a
majority in principal amount of the Securities.  However, without the consent of
each Securityholder  affected, an amendment or supplement under this Section may
not:

                   (a)  reduce the amount of Securities the Holders of which
         must consent to an amendment or supplement;

                   (b)  reduce the rate of or change the time for payment of
         interest on any Security;

                   (c)  reduce the principal of or change the Stated Maturity of
         any Security;

                   (d) reduce the premium payable upon the redemption of
         any  Security or change the time at which any  Security may or shall be
         redeemed in accordance with Article IX;

                  (e)  make any Security payable in currency or consideration
         other than that stated in the Security;

                           (f) make any change in Section  5.4,  Section  5.7 or
         this second sentence of this Section 8.2.

                  It shall not be necessary for the consent of the Holders under
this  Section  8.2 to approve the  particular  form of any  proposed  amendment,
supple ment or waiver,  but it shall be sufficient if such consent  approves the
substance thereof.

                  After an amendment or  supplement  under this Section  becomes
effective, the Company shall mail to Securityholders a notice briefly describing
such  amendment  or  supplement.   The  failure  to  give  such  notice  to  all
Securityholders,  or any defect therein, shall not impair or affect the validity
of an amendment or supplement under this Section.

SECTION 8.3  Compliance with Trust Indenture Act.

                  Every  amendment  or  supplement  to  this  Indenture  or  the
Securities shall be set forth in a supplemental indenture that complies with the
TIA as then in effect.

SECTION 8.4 Revocation and Effect of Consents.

                 Until an amendment or supplement under this Article or a waiver
under Article VI becomes effective, a consent to it by a Holder of a Security is
a continuing  consent by the Holder and every subsequent Holder of a Security or
portion of a Security that  evidences the same debt as the  consenting  Holder's
Security, even if notation of the consent is not made on any Security.  However,
any such Holder or  subsequent  Holder may revoke the consent as to his Security
or portion of a Security if the Trustee receives the notice of revocation before
the date the amendment, supplement or waiver becomes effective.

                  After an amendment or supplement becomes  effective,  it shall
bind every Securityholder.

SECTION 8.5 Notation on or Exchange of Securities.

                  If an amendment  changes the terms of a Security,  the Trustee
may require the Holder of the Security to deliver it to the Trustee. The Trustee
may place an  appropriate  notation on the Security  regarding the changed terms
and return it to the  Holder.  Alternatively,  if the  Company or the Trustee so
deter  mines,  the  Company in  exchange  for the  Security  shall issue and the
Trustee  shall  authenticate  a new Security  that  reflects the changed  terms.
Failure to make the  appropriate  notation or to issue a new Security  shall not
affect the validity of such amendment.

SECTION 8.6  Trustee To Sign Amendments.

                  The Trustee shall sign any  supplemental  indenture which sets
forth an  amendment  or  supplement  authorized  pursuant to this Article if the
amendment  or  supplement  does  not  adversely   affect  the  rights,   duties,
liabilities  or immunities of the Trustee.  If it does, the Trustee may but need
not sign it.  In  signing  such  supplemental  indenture  the  Trustee  shall be
entitled to receive,  and (subject to Section  6.1) shall be fully  protected in
relying upon, an Officers'  Certificate  and an Opinion of Counsel  stating that
such  supplemental  indenture is authorized or permitted by this  Indenture and,
with respect to an amendment or supplement  pursuant to Section 8.2, evidence of
the consents of Holders required in connec tion therewith.

SECTION 8.7 Fixing of Record Dates.

                  The Company may,  but shall not be obligated  to, fix a record
date for the  purpose of  determining  the  Holders  entitled to take any action
under this Indenture by vote or consent.  Except as provided herein, such record
date shall
be the later of 30 days prior to the first  solicitation of such consent or vote
or the date of the most recent list of Securityholders  furnished to the Trustee
pursuant to Section 2.5 prior to such  solicitation.  If a record date is fixed,
those  Persons  who were  Securityholders  at such  record  date (or their  duly
designated  proxies),  and only those  Persons,  shall be  entitled to take such
action by vote or consent or to revoke  any vote or  consent  previously  given,
whether or not such  Persons  continue  to be Holders  after such  record  date;
provided, however, that unless such vote or consent is obtained from the Holders
(or  their  duly  designated  proxies)  of the  requisite  principal  amount  of
outstanding  Securities  prior to the date  which is the 120th  day  after  such
record date, any such vote or consent  previously given shall  automatically and
without further action by any Holder be canceled and of no further effect.


                                   ARTICLE IX

                                   REDEMPTION

SECTION 9.1 Notices to Trustee.

                  If  the  Company  elects  to  redeem  Securities  pursuant  to
paragraph 5 of the Securities it shall notify the Trustee of the redemption date
and the princi pal amount  (not  including  any  premium in respect  thereof) of
Securities to be redeemed and the paragraph of the Securities  pursuant to which
the redemption will occur.

                  The  Company  shall  give  the  notices  provided  for in this
Section at least 40 days before the  redemption  date  (unless a shorter  period
shall be satisfac tory to the Trustee).  Such notice shall be  accompanied by an
Officers'  Certificate to the effect that such  redemption  will comply with the
conditions  herein.  If fewer than all the  Securities  are to be redeemed,  the
record  date  relating to such  redemption  shall be selected by the Company and
given to the Trustee, which record date shall be not less than 15 days after the
date of notice to the Trustee.

SECTION 9.2  Selection of Securities To Be Redeemed.

                  If  fewer  than all the  Securities  are to be  redeemed,  the
Trustee shall select the  Securities to be redeemed pro rata or by lot or by any
other  method  that  complies  with  applicable  legal and  securities  exchange
requirements,  if any, and that the Trustee  considers,  in its sole discretion,
fair and appropriate
and in accordance with methods generally used at the time of selection by 
fiduciaries in similar circumstances.  The Trustee shall make the selection not
more than 75 days before the redemption date from outstanding Securities not
previously called for redemption.  The Trustee may select for redemption por
tions of the principal of Securities that have denominations larger than $1,000.
Securities and portions of them selected by the Trustee shall be in amounts of
$1,000 or whole multiples of $1,000.  Provisions of this Indenture that apply to
Securities called for redemption also apply to portions of Securities called for
redemption.

SECTION 9.3 Notice of Redemption.

                  At least 30 days but not more than 60 days before a redemption
date,  the  Company  shall  mail a notice of  redemption  to each  Holder  whose
Securities  are to be  redeemed  at the address set forth for such Holder on the
register referred to in Section 2.3.

                  The notice shall  identify the  Securities  to be redeemed and
shall state:

                           (a)  the redemption date;

                           (b)  the redemption price;

                           (c)  the name and address of the Paying Agent;

                           (d)  that Securities called for redemption must be 
         surrendered to the Paying Agent to collect the redemption price;

                           (e)  if fewer than all the outstanding Securities are
         to be redeemed, the identification and principal amounts of the 
         particular Securities to be redeemed;

                           (f) that,  unless the Company  defaults in making the
         re demption  payment,  interest  on  Securities  called for  redemption
         ceases to accrue on and after the redemption date; and

                           (g)  that  no   representation  is  made  as  to  the
         correctness  or accuracy of the CUSIP  number,  if any,  listed in such
         notice or printed on the Securities.

                  At the Company's written request, made at least 45 days before
a redemption date, unless a shorter period shall be satisfactory to the Trustee,
the Trustee shall give the notice of redemption  provided for in this Section in
the Company's name and at its expense.

SECTION 9.4 Effect of Notice of Redemption.

                  Once notice of  redemption  is mailed,  Securities  called for
redemp  tion  become due and payable on the  redemption  date at the  redemption
price.  Upon surrender to the Paying Agent, such Securities shall be paid at the
re demption price stated in the notice,  plus accrued and unpaid interest to the
redemption date.

SECTION 9.5 Deposit of Redemption Price.


                  Prior to 11:00 a.m.,  eastern  standard  time,  the redemption
date,  the Company  shall deposit with the Paying Agent (or, if the Company or a
Subsidiary  is the  Paying  Agent,  shall  segregate  and hold in  trust)  money
sufficient to pay the redemption price of and accrued and unpaid interest on all
Securities  to be  redeemed  on that date other than  Securities  or portions of
Securities called for redemption which have been delivered by the Company to the
Trustee for cancel lation.

SECTION 9.6 Securities Redeemed in Part.

                  Upon  surrender  of a Security  that is redeemed in part,  the
Compa ny shall execute and the Trustee shall authenticate for the Holder (at the
Company's  expense) a new Security  equal in principal  amount to the unredeemed
portion of the Security surrendered.


                                    ARTICLE X

                                  MISCELLANEOUS

SECTION 10.1  Trust Indenture Act Controls.

                  If any  provision  of  this  Indenture  limits,  qualifies  or
conflicts  with the  duties  imposed  by any of TIA Secs 310 to 317,  inclusive,
through operation of TIA Sec 318(c), such imposed duties shall control.  SECTION
10.2 Notices.

                  Any notice or communication  shall be in writing and delivered
in person, or mailed by first-class mail (certified,  return receipt requested),
ad dressed as follows:

                  if to the Company:

                  Calpine Corporation
                  50 West San Fernando Street
                  San Jose, California  95113
                  Attention:  Corporate Secretary


                  if to the Trustee:

                  The Bank of New York
                  101 Barclay Street, Floor 21 West
                  New York, New York 10271
                  Attention:  Corporate Trust Administration

                  The  Company  or the  Trustee  by  notice  to the  others  may
designate   additional  or  different   addresses  for  subsequent   notices  or
communications.  Any notice to the Trustee under this Indenture  shall be deemed
given only when received by the Trustee at the address specified in this Section
10.2.

                  Any  notice  or  communication  to a  Securityholder  shall be
mailed by first-class mail to the Securityholder's address shown on the register
kept  by  the  Registrar.  Failure  to  mail  a  notice  or  communication  to a
Securityholder or any defect in it shall not affect its sufficiency with respect
to other Securityholders.

                  If a notice or  communication is mailed in the manner provided
above within the time prescribed, it is duly given, whether or not the addressee
receives it.

                  If  the   Company   mails  a  notice   or   communication   to
Securityholders,  it shall mail a copy to the Trustee and each Agent at the same
time.

SECTION 10.3               Communication by Holders with Other
                           Holders.

                  Securityholders  may  communicate  pursuant  to TIA Sec 312(b)
with other  Securityholders with respect to their rights under this Indenture or
the Securities.  The Company,  the Trustee,  the Registrar and anyone else shall
have the protection of TIA Sec 312(c).

SECTION 10.4               Certificate and Opinion as to Conditions Precedent.
                           --------------------------------------------------

                  Upon any request or  application by the Company to the Trustee
to take any action under this Indenture,  the Company shall, if requested by the
Trustee, furnish to the Trustee:

                           (a) an Officers'  Certificate  in form and  substance
         reason ably satisfactory to the Trustee stating that, in the opinion of
         the  signers,   all  conditions   precedent  (including  any  covenants
         compliance  with which  constitutes  a  condition  precedent),  if any,
         provided for in this  Indenture  relating to the  proposed  action have
         been complied with; and

                           (b) an  Opinion  of  Counsel  in form  and  substance
         reason ably satisfactory to the Trustee stating that, in the opinion of
         such  counsel  (which  may rely  upon an  Officers'  Certificate  as to
         factual  matters),  all such  conditions  precedent  have been complied
         with.

SECTION 10.5  Statements Required in Certificate or
                      Opinion.

                  Each Officers'  Certificate or Opinion of Counsel with respect
to compliance with a condition or covenant  provided for in this Indenture other
than certificates provided pursuant to Section 3.9 shall include:

                     (a)  a statement that the Person making such certificate or
         opinion has read such covenant or condition;

                           (b) a brief  statement  as to the nature and scope of
         the examination or investigation  upon which the statements or opinions
         contained in such certificate or opinion are based;

                           (c) a statement  that, in the opinion of such Person,
         he or she has made such examination or investigation as is necessary to
         enable him or her to express an  informed  opinion as to whether or not
         such covenant or condition has been complied with; and

                           (d) a statement  as to whether or not, in the opinion
         of such Person, such condition or covenant has been complied with.

SECTION 10.6 Rules by Trustee and Agents.

                  The  Trustee  may make  reasonable  rules  for  action by or a
meeting of  Securityholders.  The Registrar or Paying Agent may make  reasonable
rules and set reasonable requirements for its functions.

SECTION 10.7 Legal Holidays.

                  A "Legal  Holiday" is a  Saturday,  a Sunday or a day on which
banking institutions are not required to be open in the State of New York or the
State(s) in which the offices of the Trustee and the Paying  Agent are  located.
If a payment date is a Legal  Holiday,  payment may be made at that place on the
next  succeeding day that is not a Legal  Holiday,  and no interest shall accrue
for the  intervening  period.  If a regular record date is a Legal Holiday,  the
regular record date shall not be affected.

SECTION 10.8  Successors; No Recourse Against Others.

                  (a) All  agreements  of the Company in this  Indenture and the
Securities shall bind its successor. All agreements of the Trustee in this Inden
ture shall bind its successor.

                  (b) All liability of the Company  described in the  Securities
insofar as it relates to any  director,  officer,  employee or  stockholder,  as
such, of the Company is waived and released by each Securityholder.

SECTION 10.9 Duplicate Originals.

                  The parties  may sign any number of copies of this  Indenture.
One signed copy is enough to prove this Indenture.

SECTION 10.10 Other Provisions.

                  The first  certificate  pursuant to Section  3.09 shall be for
the fiscal year ending on December 31, 1997.

          The reporting date for Section 6.6 is July 15 of each year.  The first
reporting date is July 15, 1998.

SECTION 10.11 Governing Law.

                  The laws of the State of New York  govern this  Indenture  and
the Securities, without regard to the conflicts of laws rules thereof.



0173469.05-01S6a
                                                    8






                                   SIGNATURES



                                                CALPINE CORPORATION


                                                By
                                                              Name:
                                                              Title:




                                                THE BANK OF NEW YORK,
                                                            as Trustee


                                                By
                                                              Name:
                                                              Title:

Dated:  July 8, 1997



                                        9





                                    EXHIBIT A

                                    (Form of Face of Initial Security)

                  [UNLESS  THIS   SECURITY  IS   PRESENTED   BY  AN   AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION  ("DTC"),
TO THE COMPANY (AS DEFINED  BELOW) OR ITS AGENT FOR  REGISTRATION  OF  TRANSFER,
EXCHANGE OR PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE &
CO., OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED  REPRESENTA TIVE OF DTC
(AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER  ENTITY AS IS REQUESTED
BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC),  ANY  TRANSFER,  PLEDGE OR OTHER USE
HEREOF FOR VALUE OR  OTHERWISE  BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  TRANSFERS OF THIS  SECURITY  SHALL BE LIMITED TO TRANS FERS IN
WHOLE,  BUT NOT IN PART,  TO NOMINEES  OF DTC OR TO A SUCCESSOR  THEREOF OR SUCH
SUCCESSOR'S  NOMINEE AND TRANSFERS OF PORTIONS OF THIS SECURITY SHALL BE LIMITED
TO TRANSFERS MADE IN ACCORDANCE WITH THE  RESTRICTIONS  SET FORTH IN SECTION 2.8
OF THE INDENTURE (AS DEFINED BELOW).]

                  THIS  SECURITY  HAS  NOT  BEEN   REGISTERED   UNDER  THE  U.S.
SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND, ACCORDINGLY, MAY
NOT BE OFFERED OR SOLD  WITHIN  THE UNITED  STATES OR TO, OR FOR THE  ACCOUNT OR
BENEFIT OF, U.S. PERSONS EXCEPT AS SET FORTH IN THE FOLLOWING  SENTENCE.  BY ITS
ACQUISI  TION  HEREOF,  THE HOLDER (1)  REPRESENTS  THAT (A) IT IS A  "QUALIFIED
INSTITUTIONAL  BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURI TIES ACT) OR (B)
IT IS  NOT  A  U.S.  PERSON  AND  IS  ACQUIRING  THIS  SECURITY  IN AN  OFFSHORE
TRANSACTION  IN  COMPLIANCE  WITH REGULA TION S UNDER THE  SECURITIES  ACT,  (2)
AGREES  THAT IT WILL  NOT,  WITHIN  TWO YEARS  AFTER  THE LATER OF THE  ORIGINAL
ISSUANCE OF THIS SECURITY OR THE LAST DATE ON WHICH THIS SECURITY WAS HELD BY AN
AFFILIATE OF THE COMPANY,  RESELL OR OTHERWISE TRANSFER THIS SECURITY EXCEPT (A)
TO THE  COMPANY OR ANY  SUBSIDIARY  THEREOF,  (B) INSIDE THE UNITED  STATES TO A
QUALIFIED  INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES
ACT,  (C) OUTSIDE THE UNITED  STATES IN AN OFFSHORE  TRANSACTION  IN COMPLI ANCE
WITH RULE 904 UNDER THE  SECURITIES  ACT,  (D)  PURSUANT TO THE  EXEMPTION  FROM
REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (E)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3)
AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THIS SECURITY IS  TRANSFERRED
A NOTICE SUBSTANTIALLY TO THE EFFECT OF THIS LEG
END.  IN CONNECTION WITH ANY TRANSFER OF THIS SECURITY WITHIN TWO YEARS AFTER 
THE LATER OF THE ORIGINAL ISSUANCE OF THIS
SECURITY OR THE LAST DATE ON WHICH THIS SECURITY WAS HELD BY
AN AFFILIATE OF THE COMPANY, THE HOLDER MUST CHECK THE APPROPRIATE BOX SET FORTH
HEREIN  RELATING TO THE MANNER OF SUCH  TRANSFER AND SUBMIT THIS SECURITY TO THE
TRUSTEE. AS USED HEREIN, THE TERMS "OFFSHORE  TRANSACTION,"  "UNITED STATES" AND
"U.S.  PERSON"  HAVE  THE  MEANINGS  GIVEN  TO THEM BY  REGULATION  S UNDER  THE
SECURITIES  ACT. THE  INDENTURE  CONTAINS A PROVISION  REQUIRING  THE TRUSTEE TO
REFUSE TO REGISTER ANY TRANSFER OF THIS  SECURITY IN VIOLATION OF THE  FOREGOING
RESTRICTIONS.


- --------
         This legend  should only be added if the Security is issued as a Global
Note.

                                       A-1




                               CALPINE CORPORATION
                           8 3/4% Senior Note Due 2007

No. S-1                                                             $200,000,000

                                                            CUSIP:     131347AE6
                                                         ISIN:      US131347AE66

         Calpine Corporation, a Delaware corporation,  promises to pay to Cede &
Co., or registered assigns,  the principal sum of Two Hundred Million Dollars on
July 15, 2007.

                 Interest Payment Dates: January 15 and July 15
                       Record Dates: January 1 and July 1

         Additional  provisions  of this  Security  are set forth on the reverse
hereof.



                  IN WITNESS WHEREOF, the Company has caused this Security to be
signed manually or by facsimile by its duly authorized officers.

Date:

                                                          CALPINE CORPORATION


                                                          By
                                                              Name:
                                                              Title:


                                                          By
                                                              Name:
                                                              Title:

TRUSTEE'S CERTIFICATE
  OF AUTHENTICATION:

The Bank of New York, as Trustee,  certifies  that this is one of the Securities
referred to in the Indenture.

By: _________________________                      Dated: ______________________
        Authorized Signature

                      (Form of Reverse of Initial Security)

                               Calpine Corporation
                           8 3/4% Senior Note Due 2007


                  (1)  Interest.  Calpine  Corporation,  a Delaware  corporation
(such corpora tion, and its successors and assigns under the Indenture  referred
to below,  being herein called the  "Company"),  promises to pay interest on the
principal  amount of this Security at 8 3/4% per annum (subject to adjustment as
provided  below).  The Company will pay interest  semiannually on January 15 and
July 15 of each year.  Interest  on the  Securities  will  accrue  from the most
recent date to which  interest  has been paid or, if no interest  has been paid,
from July 8, 1997.  Interest  will be  computed  on the basis of a 360-day  year
consisting of twelve 30-day months.

                  If an exchange offer  registered  under the Securities Act (as
defined in the Indenture) is not consummated,  or a registration statement under
the  Securities  Act with respect to resales of the  Securities  is not declared
effective by the SEC (as defined in the  Indenture),  by the 180th  calendar day
following the initial sale of the Securities,  in accordance with the terms of a
Registration  Rights  Agreement  dated  July 1, 1997 by and  among the  Company,
Credit  Suisse  First Boston  Corporation,  Morgan  Stanley & Co.  Incorporated,
Salomon  Brothers  Inc  and  Scotia  Capital  Markets  (USA)  Inc.,  BancAmerica
Securities,  Inc. and CIBC Wood Gundy Securities Corp. interest due per annum on
the Securities  shall be permanently  increased by one-half of one percent,  com
mencing as of January 5, 1998 (the 181st calendar day following the initial sale
of the  Securities).  The holder of this Security is entitled to the benefits of
such Registration Rights Agreement.

                  (2) Method of Payment.  The Company  will pay  interest on the
Securities (except defaulted interest) to the persons who are registered Holders
of  Securities  at the close of business on the record date next  preceding  the
interest payment date even though  Securities are canceled after the record date
and on or before the interest payment date. Holders must surrender Securities to
a Paying Agent to collect principal payments. The Company will pay principal and
interest  in money of the  United  States  that at the time of  payment is legal
tender for payment of public and  private  debts.  However,  the Company may pay
principal and interest by check  payable in such money.  It may mail an interest
check to a Holder's registered address.

           (3)  Paying Agent, Registrar.  Initially, The Bank of New York, a New
York banking corporation (the "Trustee"), will act as Paying Agent and 
Registrar.  The Company may change any Paying Agent, Registrar or co-registrar
 without notice. The Company may act as Paying Agent, Registrar or co-registrar.

                  (4)  Indenture.  The Company issued the Securities under an 
Indenture dated as of July 8, 1997 (the "Indenture") between the Company and the
 Trustee.  The Securities  are  unsecured  general   obligations  of  the  
Company  limited  to $275,000,000 in aggregate  principal amount. The terms of 
the Securities include those stated in the  Indenture and those made part of the
Indenture by reference to the Trust Indenture Act of 1939 (15 U.S. Code 
Secs 77aaa-77bbbb) (the "TIA").  Capitalized  terms used herein but not defined 
herein are used as defined in the Indenture. The Securities are subject to all 
such terms, and Securityholders are referred to the Indenture and the TIA for a 
statement of such terms.

                  (5) Optional Redemption.  Except as set forth in the following
paragraph,  the Company may not redeem the Securities prior to July 15, 2002. On
and after such date,  the  Company  may redeem the  Securities  at any time as a
whole,  or from  time  to  time in  part,  at the  following  redemption  prices
(expressed in percentages  of principal  amount),  plus accrued  interest to the
redemption date, if redeemed during the 12-month period beginning July 15,

                  Year                                      %

                  2002   . . . . . . . . . .              104.3750%
                  2003   . . . . . . . . . .              102.1875%
                  2004 and thereafter . .                   100.000%

                  The Company may redeem up to $70,000,000  principal  amount of
Securi ties with the proceeds of one or more Public Equity  Offerings  following
which  there is a Public  Market,  at any time in whole or from  time to time in
part, at a price (expressed as a percentage of principal  amount),  plus accrued
interest  to the  redemption  date,  of 108.75% if redeemed at any time prior to
July 15, 2000.

                  (6) Notice of Redemption.  Notice of redemption will be mailed
at least 30 days but not more than 60 days  before the  redemption  date to each
Holder of Securi ties to be redeemed at the address set forth for such Holder on
the  register  referred to in Section 2.3 of the  Indenture.  Unless the Company
shall default in payment of the re demption price plus accrued interest,  on and
after the  redemption  date  interest  ceases to  accrue on such  Securities  or
portions of them called for redemption.  Securities in denominations larger than
$1,000 may be redeemed in part but only in whole multiples of $1,000.

                  (7) Denominations;  Transfer;  Exchange. The Securities are in
registered  form  without  coupons in  denominations  of $1,000 and any integral
multiple  thereof.  The transfer of Securities  may be registered and Securities
may be  exchanged  as provided in the  Indenture.  The  Registrar  may require a
Holder,  among other things,  to furnish  appropriate  endorsements and transfer
documents  and to pay any taxes and fees  required  by law or  permitted  by the
Indenture.  The  Registrar  need not  exchange or register  the  transfer of any
Security or portion of a Security selected for redemption (except, in the
case of a  Security  to be  redeemed  in part,  the  portion  thereof  not to be
redeemed)  or any  Securities  for a period  of 15 days  before a  selection  of
Securities to be redeemed, or 15 days before an interest payment date.

                  (8) Put Provisions. Upon a Change of Control Triggering Event,
any Holder of Securities  will have the right to cause the Company to repurchase
all or any part of the Securities of such Holder at a repurchase  price equal to
101% of the principal  amount of the Securities to be  repurchased  plus accrued
interest to the date of  repurchase as provided in, and subject to the terms of,
the Indenture.

                  (9) Defeasance.  Subject to certain conditions, the Company at
any time may terminate some or all of its  obligations  under the Securities and
the  Indenture  if the  Company  deposits  with the  Trustee  money  and/or U.S.
Government  Obligations  for  the  payment  of  principal  and  interest  on the
Securities to redemption or maturity, as the case may be.

                  (10)  Persons  Deemed  Owners.  The  registered  Holder  of  a
Security  may be treated as its owner for all  purposes,  except  that  interest
(other  than  defaulted  interest)  will  be  paid to the  person  that  was the
registered Holder on the relevant record date for such payment of interest.

                  (11)  Amendments and Waivers.  Subject to certain  exceptions,
(i) the  Indenture or the  Securities  may be amended or  supplemented  with the
consent of the Holders of a majority in principal amount of the Securities;  and
(ii) any  existing  default  may be waived  with the consent of the Holders of a
majority  in  principal  amount of the  Securities.  Without  the consent of any
Securityholder,  the Indenture or the Securities may be amended or  supplemented
to cure any  ambiguity,  omission,  defect or incon  sistency,  to  provide  for
assumption  of  Company   obligations  to  Securityholders  or  to  provide  for
uncertificated Securities in addition to or in place of certificated Securities,
to provide for guarantees with respect to, or security for, the  Securities,  or
to comply  with the TIA or to add  additional  covenants  or  surrender  Company
rights,  or to make any change that does not adversely  affect the rights of any
Securityholder.

                  (12)   Remedies.   If  an  Event  of  Default  occurs  and  is
continuing,  the Trustee or Holders of at least 25% in  principal  amount of the
Securities  may declare all the  Securities  to be due and payable  immediately.
Securityholders  may not  enforce  the  Indenture  or the  Securities  except as
provided  in the  Indenture.  The Trustee  may  require an  indemnity  before it
enforces  the  Indenture or the  Securities.  Subject to certain  limita  tions,
Holders of a  majority  in  principal  amount of the  Securities  may direct the
Trustee in its  exercise of any trust or power.  The Trustee may  withhold  from
Securityholders notice of any continuing default (except a Default in payment of
principal or  interest) if it  determines  that  withholding  notice is in their
interests.  The Company must  furnish an annual  compliance  certificate  to the
Trustee.

                  (13) Trustee Dealings with Company.  Subject to the provisions
of the TIA, the Trustee  under the  Indenture,  in its  individual  or any other
capacity,  may make loans to, accept deposits from, and perform services for the
Company  or its  Affiliates,  and may  otherwise  deal with the  Company  or its
Affiliates, as if it were not Trustee.
The Trustee will initially be The Bank of New York.

                  (14) No Recourse Against Others. A director, officer, employee
or  stockholder,  as such,  of the Company  shall not have any liability for any
obligations  of the Company  under the  Securities  or the  Indenture or for any
claim  based  on,  in  respect  of or by  reason  of such  obligations  or their
creation.  Each  Securityholder  by accepting a Security waives and releases all
such  liability.  The waiver and release are part of the  consideration  for the
issue of the Securities.

                  (15)  Authentication.  This Security  shall not be valid until
authenticated by the manual signature of an authorized  signatory of the Trustee
or an authenticating agent.

                  (16) Abbreviations. Customary abbreviations may be used in the
name of a Securityholder or an assignee, such as: TEN COM (= tenants in common),
TEN ENT (= tenants by the  entireties),  JT TEN (= joint  tenants  with right of
survivorship and not as tenants in common),  CUST (= Custodian),  and U/G/M/A (=
Uniform Gifts to Minors Act).


                  Pursuant to a  recommendation  promulgated by the Committee on
Uniform Security Identification  Procedures the Company has caused CUSIP numbers
to be  printed  on the  Securities  and has  directed  the  Trustee to use CUSIP
numbers  in  notices of  redemption  as a  convenience  to  Securityholders.  No
representation  is made as to the accuracy of such numbers  either as printed on
the  Securities or as contained in any notice of redemption  and reliance may be
placed only on the other identification numbers placed thereon.

                  The Company  will furnish to any  Securityholder  upon written
request and without charge a copy of the Indenture,  which has in it the text of
this  Security  in larger  type.  Requests  may be made to:  Secretary,  Calpine
Corporation, 50 West San Fernando Street, San Jose, California 95113.

                                       A-2







                                 ASSIGNMENT FORM

To assign this Security, fill in the form below:
   I or we assign and transfer this Security to

                                 (Insert assignee's soc. sec or tax I.D. no.)



              (Print or type assignee's name, address and zip code)

and irrevocably appoint  agent to transfer this Security on the books
of the Company.  The agent may substitute another to act for him.



Dated:                                                        Signed:

                    (Sign exactly as your name appears on the
                          other side of this Security)

Signature Guarantee:

Signatures must be guaranteed by an "eligible guarantor institution" meeting the
requirements  of  the  Registrar,   which  requirements  include  membership  or
participation in the Security Transfer Agent Medallion Program ("STAMP") or such
other  "signature  guarantee  program" as may be  determined by the Registrar in
addition  to,  or in  substitution  for,  STAMP,  all  in  accordance  with  the
Securities Exchange Act of 1934, as amended.

                                        MANNER OF TRANSFER (Check one)

Transfer to Calpine Corporation                                        o
Transfer to Qualified Institutional Buyer                              o
Transfer outside the United States in
  compliance with Rule 904 under
  the Securities Act of 1993                                           o


                                    OPTION OF HOLDER TO ELECT PURCHASE FORM

         If you wish to elect to have this Security purchased by the Company 
pursuant to Section 3.8 or 3.12 of the Indenture, check this box: |_|

         If you wish to elect to have only part of this  Security  purchased  by
the Company pursuant to Section 3.8 or 3.12 of the Indenture,  state the amount:
$

         *As set forth in the Indenture,  any purchase  pursuant to Section 3.12
is subject to proration in the event the offer is oversubscribed.

Dated:                                                        Signed:

                    (Sign exactly as your name appears on the
                          other side of this Security)

Signature Guarantee:

Signatures must be guaranteed by an "eligible guarantor institution" meeting the
requirements  of  the  Registrar,   which  requirements  include  membership  or
participation in the Security Transfer Agent Medallion Program ("STAMP") or such
other  "signature  guarantee  program" as may be  determined by the Registrar in
addition  to,  or in  substitution  for,  STAMP,  all  in  accordance  with  the
Securities Exchange Act of 1934, as amended.


                                       A-3





                                    EXHIBIT B


                                      (Form of Face of Exchange Security)

                  [UNLESS  THIS   SECURITY  IS   PRESENTED   BY  AN   AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION  ("DTC"),
TO THE COMPANY (AS DEFINED  BELOW) OR ITS AGENT FOR  REGISTRATION  OF  TRANSFER,
EXCHANGE OR PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE &
CO., OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED  REPRESENTATIVE  OF DTC
(AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER  ENTITY AS IS REQUESTED
BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC),  ANY  TRANSFER,  PLEDGE OR OTHER USE
HEREOF FOR VALUE OR  OTHERWISE  BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS THE
REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  TRANSFERS  OF THIS  SECURITY  SHALL BE LIMITED TO TRANSFERS IN
WHOLE,  BUT NOT IN PART,  TO NOMINEES  OF DTC OR TO A SUCCESSOR  THEREOF OR SUCH
SUCCESSOR'S  NOMINEE AND TRANSFERS OF PORTIONS OF THIS SECURITY SHALL BE LIMITED
TO TRANSFERS MADE IN ACCORDANCE WITH THE  RESTRICTIONS  SET FORTH IN SECTION 2.8
OF THE INDENTURE (AS DEFINED BELOW).]


- --------
         This legend  should only be added if the Security is issued as a Global
Note.

                                       B-1






                               CALPINE CORPORATION
                           8 3/4% Senior Note Due 2007


                                No. $200,000,000

                                CUSIP: 131347AE6
                               ISIN: US131347AE66

         Calpine Corporation, a Delaware corporation,  promises to pay to Cede &
Co., or registered assigns,  the principal sum of Two Hundred Million Dollars on
July 15, 2007.

                                Interest Payment Dates:  January 15 and July 15
                                      Record Dates:  January 1 and July 1

         Additional  provisions  of this  Security  are set forth on the reverse
hereof.

                  IN WITNESS WHEREOF, the Company has caused this Security to be
signed manually or by facsimile by its duly authorized officers.

Date:

                                                          CALPINE CORPORATION

                                                          By
                                                              Name:
                                                              Title:

                                                          By
                                                              Name:
                                                              Title:

TRUSTEE'S CERTIFICATE
  OF AUTHENTICATION:

The Bank of New York, as Trustee,  certifies  that this is one of the Securities
referred to in the Indenture.

By: _________________________                       Dated: ____________________
        Authorized Signature


                                       B-2





                       (Form of Back of Exchange Security)

                               Calpine Corporation
                           8 3/4 Senior Note Due 2007


                  (1) Interest.  Calpine Corporation,  a California  corporation
(such corpora tion, and its successors and assigns under the Indenture  referred
to below,  being herein called the  "Company"),  promises to pay interest on the
principal  amount of this  Security  at 8 3/4 per annum.  The  Company  will pay
interest  semiannually  on January 15 and July 15 of each year.  Interest on the
Securities will accrue from the most recent date to which interest has been paid
or, if no interest has been paid,  from July 8, 1997.  Interest will be computed
on the basis of a 360-day year consisting of twelve 30-day months.

                  (2) Method of Payment.  The Company  will pay  interest on the
Securities (except defaulted interest) to the persons who are registered Holders
of  Securities  at the close of business on the record date next  preceding  the
interest payment date even though  Securities are canceled after the record date
and on or before the interest payment date. Holders must surrender Securities to
a Paying Agent to collect principal payments. The Company will pay principal and
interest  in money of the  United  States  that at the time of  payment is legal
tender for payment of public and  private  debts.  However,  the Company may pay
principal and interest by check  payable in such money.  It may mail an interest
check to a Holder's registered address.

                    (3)  Paying  Agent,  Registrar.  Initially,  The Bank of New
York, a New York banking  corporation (the "Trustee"),  will act as Paying Agent
and  Registrar.   The  Company  may  change  any  Paying  Agent,   Registrar  or
co-registrar  without notice. The Company may act as Paying Agent,  Registrar or
co-registrar.

                  (4)  Indenture.  The Company  issued the  Securities  under an
Indenture dated as of July 8, 1997 (the "Indenture") between the Company and the
Trustee. The Securities are unsecured general obligations of the Company limited
to  $275,000,000  in aggregate  principal  amount.  The terms of the  Securities
include  those stated in the  Indenture  and those made part of the Indenture by
reference to the Trust  Indenture Act of 1939 (15 U.S.  Code Secs  77aaa-77bbbb)
(the "TIA").  Capitalized  terms used herein but not defined  herein are used as
defined in the  Indenture.  The  Securities  are subject to all such terms,  and
Securityholders  are  referred to the  Indenture  and the TIA for a statement of
such terms.
                  (5) Optional Redemption.  Except as set forth in the following
paragraph,  the Company may not redeem the Securities prior to July 15, 2002. On
and after such date,  the  Company  may redeem the  Securities  at any time as a
whole,  or from  time  to  time in  part,  at the  following  redemption  prices
(expressed in percentages  of principal  amount),  plus accrued  interest to the
redemption date, if redeemed during the 12-month period beginning July 15,

                  Year                                      %

                  2002   . . . . . . . . . .              104.3750%
                  2003   . . . . . . . . . .              102.1875%
                  2004, and thereafter . .                  100.00%

                  The Company may redeem up to $70,000,000  principal  amount of
Securities with the proceeds of one or more Public Equity  Offerings at any time
in whole or from time to time in part, at a price  (expressed as a percentage of
principal  amount),  plus accrued interest to the redemption date, of 108.75% if
redeemed at any time prior to July 15, 2000.

                  (6) Notice of Redemption.  Notice of redemption will be mailed
at least 30 days but not more than 60 days  before the  redemption  date to each
Holder of  Securities to be redeemed at the address set forth for such Holder on
the  register  referred to in Section 2.3 of the  Indenture.  Unless the Company
shall default in payment of the redemption price plus accrued  interest,  on and
after the  redemption  date  interest  ceases to  accrue on such  Securities  or
portions of them called for redemption.  Securities in denominations larger than
$1,000 may be redeemed in part but only in whole multiples of $1,000.

                  (7) Denominations;  Transfer;  Exchange. The Securities are in
registered  form  without  coupons in  denominations  of $1,000 and any integral
multiple  thereof.  The transfer of Securities  may be registered and Securities
may be  exchanged  as provided in the  Indenture.  The  Registrar  may require a
Holder,  among other things,  to furnish  appropriate  endorsements and transfer
documents  and to pay any taxes and fees  required  by law or  permitted  by the
Indenture.  The  Registrar  need not  exchange or register  the  transfer of any
Security or portion of a Security selected for redemption  (except,  in the case
of a Security to be redeemed in part, the portion thereof not to be redeemed) or
any  Securities  for a period of 15 days before a selection of  Securities to be
redeemed, or 15 days before an interest payment date.

                  (8) Put Provisions. Upon a Change of Control Triggering Event,
any Holder of Securities  will have the right to cause the Company to repurchase
all or any part of the Securities of such Holder at a repurchase  price equal to
101% of the principal  amount of the Securities to be  repurchased  plus accrued
interest to the date of  repurchase as provided in, and subject to the terms of,
the Indenture.

                  (9) Defeasance.  Subject to certain conditions, the Company at
any time may terminate some or all of its  obligations  under the Securities and
the  Indenture  if the  Company  deposits  with the  Trustee  money  and/or U.S.
Government  Obligations  for  the  payment  of  principal  and  interest  on the
Securities to redemption or maturity, as the case may be.

                  (10)  Persons  Deemed  Owners.  The  registered  Holder  of  a
Security  may be treated as its owner for all  purposes,  except  that  interest
(other  than  defaulted  interest)  will  be  paid to the  person  that  was the
registered Holder on the relevant record date for such payment of interest.

                  (11)  Amendments and Waivers.  Subject to certain  exceptions,
(i) the  Indenture or the  Securities  may be amended or  supplemented  with the
consent of the Holders of a majority in principal amount of the Securities;  and
(ii) any  existing  default  may be waived  with the consent of the Holders of a
majority  in  principal  amount of the  Securities.  Without  the consent of any
Securityholder,  the Indenture or the Securities may be amended or  supplemented
to cure any  ambiguity,  omission,  defect  or  inconsistency,  to  provide  for
assumption  of  Company   obligations  to  Securityholders  or  to  provide  for
uncertificated Securities in addition to or in place of certificated Securities,
to provide for guarantees with respect to, or security for, the  Securities,  or
to comply  with the TIA or to add  additional  covenants  or  surrender  Company
rights,  or to make any change that does not adversely  affect the rights of any
Securityholder.

                  (12)   Remedies.   If  an  Event  of  Default  occurs  and  is
continuing,  the Trustee or Holders of at least 25% in  principal  amount of the
Securities  may declare  all the Securi ties to be due and payable  immediately.
Securityholders  may not  enforce  the  Indenture  or the  Securities  except as
provided  in the  Indenture.  The Trustee  may  require an  indemnity  before it
enforces  the  Indenture  or the  Securities.  Subject to  certain  limitations,
Holders of a  majority  in  principal  amount of the  Securities  may direct the
Trustee in its  exercise of any trust or power.  The Trustee may  withhold  from
Securityholders notice of any continuing default (except a Default in payment of
principal or  interest) if it  determines  that  withholding  notice is in their
interests.  The Company must  furnish an annual  compliance  certificate  to the
Trustee.

                    (13)  Trustee   Dealings  with   Company.   Subject  to  the
provisions of the TIA, the Trustee under the Indenture, in its individual or any
other capacity,  may make loans to, accept  deposits from, and perform  services
for the Company or its  Affiliates,  and may otherwise  deal with the Company or
its  Affiliates,  as if it were not Trustee.  The Trustee will  initially be The
Bank of New York.

                    (14)  No  Recourse  Against  Others.  A  director,  officer,
employee or  stockholder,  as such,  of the Company shall not have any liability
for any  obligations of the Company under the Securities or the Indenture or for
any claim  based on, in  respect  of or by reason of such  obligations  or their
creation.  Each  Securityholder  by accepting a Security waives and releases all
such  liability.  The waiver and release are part of the  consideration  for the
issue of the Securities.

                  (15)  Authentication.  This Security  shall not be valid until
authenticated by the manual signature of an authorized  signatory of the Trustee
or an authenticating agent.

                  (16) Abbreviations. Customary abbreviations may be used in the
name of a Securityholder or an assignee, such as: TEN COM (= tenants in common),
TEN ENT (= tenants by the  entireties),  JT TEN (= joint  tenants  with right of
survivorship and not as tenants in common),  CUST (= Custodian),  and U/G/M/A (=
Uniform Gifts to Minors Act).

                  Pursuant to a  recommendation  promulgated by the Committee on
Uniform Security Identification  Procedures the Company has caused CUSIP numbers
to be  printed  on the  Securities  and has  directed  the  Trustee to use CUSIP
numbers  in  notices of  redemption  as a  convenience  to  Securityholders.  No
representation  is made as to the accuracy of such numbers  either as printed on
the  Securities or as contained in any notice of redemption  and reliance may be
placed only on the other identification numbers placed thereon.

                    The Company will furnish to any Securityholder  upon written
request and without charge a copy of the Indenture,  which has in it the text of
this  Security  in larger  type.  Requests  may be made to:  Secretary,  Calpine
Corporation, 50 West San Fernando Street, San Jose, California 95113.

- --------
         9 1/4% if the exchange offer is not consummated before January 5, 1998.

                                       B-3







                                 ASSIGNMENT FORM

To assign this Security, fill in the form below:
   I or we assign and transfer this Security to


                  (Insert assignee's soc. sec or tax I.D. no.)




              (Print or type assignee's name, address and zip code)

and irrevocably appoint agent to transfer this Security on the books
of the Company.  The agent may substitute another to act for him.



Dated:                                                        Signed:

                    (Sign exactly as your name appears on the
                          other side of this Security)

Signature Guarantee:

Signatures must be guaranteed by an "eligible guarantor institution" meeting the
requirements  of  the  Registrar,   which  requirements  include  membership  or
participation in the Security Transfer Agent Medallion Program ("STAMP") or such
other  "signature  guarantee  program" as may be  determined by the Registrar in
addition  to,  or in  substitution  for,  STAMP,  all  in  accordance  with  the
Securities Exchange Act of 1934, as amended.


                     OPTION OF HOLDER TO ELECT PURCHASE FORM

         If you wish to elect to have this Security purchased by the Company 
pursuant to Section 3.8 or 3.12 of the Indenture, check this box: |_|

         If you wish to elect to have only part of this  Security  purchased  by
the Company pursuant to Section 3.8 or 3.12 of the Indenture,  state the amount:
$

         *As set forth in the Indenture,  any purchase  pursuant to Section 3.12
is subject to proration in the event the offer is oversubscribed.

Dated:                                                        Signed:

                    (Sign exactly as your name appears on the
                          other side of this Security)

Signature Guarantee:

Signatures must be guaranteed by an "eligible guarantor institution" meeting the
requirements  of  the  Registrar,   which  requirements  include  membership  or
participation in the Security Transfer Agent Medallion Program ("STAMP") or such
other  "signature  guarantee  program" as may be  determined by the Registrar in
addition  to,  or in  substitution  for,  STAMP,  all  in  accordance  with  the
Securities Exchange Act of 1934, as amended.

                                       B-4





                                    EXHIBIT C

                       Form of Certificate to be Delivered
                           In Connection with Transfer
                              Pursuant to Rule 144A

The Bank of New York, as Depositary
101 Barclay Street, Floor 21 West
New York, NY  10286
Attention:  Corporate Trust Trustee Administration

         Re:      Calpine Corporation (the "Company")
                  8 3/4% Senior Notes due 2007 (the "Securities")

Dear Sirs:

                  In connection  with our proposed  sale of $________  aggregate
principal amount of the Securities,  we confirm that such sale has been effected
pursuant to and in accordance  with a transaction  meeting the  requirements  of
Rule 144A under the  Securities  Act of 1933, as amended (the "Act").  We hereby
certify that we are and the transferee is a "qualified  institutional buyer" (as
defined in Rule 144A  under the Act) and that we are acting for our own  account
or  for  the  account  of one  or  more  qualified  institutional  buyers,  and,
accordingly,  we agree  (or if we were  acting  for the  account  of one or more
qualified  institutional  buyers,  each such qualified  institutional  buyer has
confirmed to us that it agrees) that we or the transferee will not offer,  sell,
pledge or otherwise  transfer the Notes except (A) to a Person who we reasonably
believe (or the transferee and anyone acting on its behalf reasonably  believes)
is a qualified  institutional buyer in a transaction meeting the requirements of
Rule 144A,  or (B) pursuant to the  exemption  from  registration  under the Act
provided  by Rule  144 (if  available),  in each  case in  accordance  with  any
applicable securities laws of the states of the United States.

                  If we are a  broker-dealer,  we  further  certify  that we are
acting for the account of our customer and that our customer has  confirmed  the
accuracy  of the  representations  contained  herein that are  applicable  to it
(including the representations with respect to beneficial ownership).

                  This certificate and the statements  contained herein are made
for the benefit of the Company  and the Initial  Purchasers.  Terms used in this
certificate  and not otherwise  defined in the  Indenture  have the meanings set
forth in Regulation S under the Securities Act.

Dated:                                      [Insert Name of Transferor]

                                                     By:
                                                           Name:
                                                           Title:


                                       C-1





                                    EXHIBIT D

                       Form of Certificate to Be Delivered
                          in Connection with Transfers
                            Pursuant to Regulation S

                                -----------, ----

The Bank of New York
101 Barclay Street
New York, New York 10026
Attention:  Corporate Trust Department

Calpine Corporation
50 West San Fernando Street
San Jose, California  95113
Attention:  Corporate Secretary

         Re:      Calpine Corporation (the "Company")
                  8 3/4% Senior Notes Due 2007 (the "Securities")

Dear Sirs:

                  In connection with our proposed sale of $___________ aggregate
principal amount of the Securities,  we confirm that such sale has been effected
pursuant to and in  accordance  with  Regulation S under the  Securities  Act of
1933, as amended, and, accordingly, we represent that:

                  (1)  the offer of the Securities was not made to a person in 
the United States;

                  (2) at the time the buy order was  originated,  the transferee
         was outside the United States or we and any person acting on our behalf
         reasonably believed that the transferee was outside the United States;

                  (3) no directed  selling  efforts  have been made by us in the
         United States in  contravention  of the  requirements of Rule 903(b) or
         Rule 904(b) of Regulation S, as applicable; and

                  (4)  the transaction is not part of a plan or scheme to evade 
        the registration requirements of the U.S. Securities Act of 1933.

You and the  Company are  entitled to rely upon this letter and are  irrevocably
authorized  to produce this letter or a copy hereof to any  interested  party in
any  administrative or legal proceedings or official inquiry with respect to the
matters covered  hereby.  Terms used in this  certificate  have the meanings set
forth in Regulation S.

                                                            Very truly yours,

                                                            [Name of Transferor]



                                                     By:_______________________
                                                          Authorized Signature

                                       D-1













                               CALPINE CORPORATION


                                       and

                          THE BANK OF NEW YORK, Trustee




                                    Indenture

                            Dated as of July 8, 1997




                                  $275,000,000

                          8 3/4% Senior Notes Due 2007



                                       D-2






                                    ARTICLE I

DEFINITIONS AND INCORPORATION BY REFERENCE...................................  1

         SECTION 1.1  Definitions...........................................   1
         SECTION 1.2  Other Definitions.....................................  23
         SECTION 1.3  Incorporation by Reference of Trust Indenture Act.....  23
         SECTION 1.4  Rules of Construction.................................  24

                                   ARTICLE II

THE SECURITIES............................................................... 25

         SECTION 2.1  Form and Dating........................................ 25
         SECTION 2.2  Execution and Authentication........................... 27
         SECTION 2.3  Registrar and Paying Agent............................. 28
         SECTION 2.4  Paying Agent To Hold Money in Trust.................... 29
         SECTION 2.5  Securityholder Lists................................... 30
         SECTION 2.6  Transfer and Exchange.................................. 30
         SECTION 2.7  Book-Entry Provisions for Global Note.................. 31
         SECTION 2.8  Special Transfer Provisions............................ 32
         SECTION 2.9  Replacement Securities................................. 34
         SECTION 2.10  Outstanding Securities................................ 34
         SECTION 2.11  Determination of Holders' Action...................... 35
         SECTION 2.12  Temporary Securities.................................. 35
         SECTION 2.13  Cancellation.......................................... 35
         SECTION 2.14  Defaulted Interest.................................... 36

                                   ARTICLE III

COVENANTS.................................................................... 36

         SECTION 3.1  Payment of Securities.................................. 36
         SECTION 3.2  Maintenance of Office or Agency........................ 37
         SECTION 3.3  Limitation on Restricted Payments...................... 37
         SECTION 3.4  Limitation on Incurrence of Indebtedness............... 41
         SECTION 3.5  Limitation on Payment Restrictions Affecting 
                      Subsidiaries........................................... 43
         SECTION 3.6  Limitation on Sale/Leaseback Transactions.............. 44
         SECTION 3.7  Limitation on Liens.................................... 45
         SECTION 3.8  Change of Control...................................... 47
         SECTION 3.9  Compliance Certificate................................. 49
         SECTION 3.10  SEC Reports........................................... 50
         SECTION 3.11  Transactions with Affiliates.......................... 50
         SECTION 3.12  Sales of Assets....................................... 51
         SECTION 3.13  Corporate Existence................................... 55
         SECTION 3.14  Payment of Taxes and Other Claims..................... 56
         SECTION 3.15  Notice of Defaults and Other Events................... 56
         SECTION 3.16  Maintenance of Properties and Insurance............... 57
         SECTION 3.17  Limitation on Issuance of Capital Stock and Incurrence
                                of Indebtedness of Restricted Subsidiaries... 57
         SECTION 3.18  Limitation on Changes in the Nature of the Business... 58
         SECTION 3.19  Limitation on Subsidiary Investments.................. 58

                                   ARTICLE IV

CONSOLIDATION, MERGER AND SALE............................................... 59

         SECTION 4.1  Merger and Consolidation of Company. .................. 59
         SECTION 4.2  Successor Substituted.................................. 61

                                    ARTICLE V

DEFAULTS AND REMEDIES........................................................ 62

         SECTION 5.1  Events of Default...................................... 62
         SECTION 5.2  Acceleration........................................... 64
         SECTION 5.3  Other Remedies......................................... 65
         SECTION 5.4  Waiver of Past Defaults................................ 65
         SECTION 5.5  Control by Majority.................................... 65
         SECTION 5.6  Limitation on Suits.................................... 66
         SECTION 5.7  Rights of Holders To Receive Payment................... 67
         SECTION 5.8  Collection Suit by Trustee............................. 67
         SECTION 5.9  Trustee May File Proofs of Claim....................... 67
         SECTION 5.10  Priorities............................................ 68
         SECTION 5.11  Undertaking for Costs................................. 68
         SECTION 5.12  Waiver of Stay or Extension Laws...................... 68

                                   ARTICLE VI

TRUSTEE...................................................................... 69

         SECTION 6.1  Duties of Trustee...................................... 69
         SECTION 6.2  Rights of Trustee...................................... 70
         SECTION 6.3  Individual Rights of Trustee........................... 71
         SECTION 6.4  Trustee's Disclaimer................................... 71
         SECTION 6.5  Notice of Defaults..................................... 71
         SECTION 6.6  Reports by Trustee to Holders.......................... 72
         SECTION 6.7  Compensation and Indemnity............................. 72
         SECTION 6.8  Replacement of Trustee................................. 73
         SECTION 6.9  Successor Trustee by Merger, etc....................... 74
         SECTION 6.10  Eligibility; Disqualification......................... 74
         SECTION 6.11  Preferential Collection of Claims Against Company.  .. 74

                                   ARTICLE VII

SATISFACTION AND DISCHARGE OF INDENTURE...................................... 75

         SECTION 7.1  Discharge of Liability on Securities; Defeasance....... 75
         SECTION 7.2  Termination of Company's Obligations................... 75
         SECTION 7.3  Defeasance and Discharge of Indenture.................. 76
         SECTION 7.4  Defeasance of Certain Obligations...................... 79
         SECTION 7.5  Application of Trust Money............................. 81
         SECTION 7.6  Repayment to Company................................... 81
         SECTION 7.7  Reinstatement.......................................... 82

                                  ARTICLE VIII

AMENDMENTS AND SUPPLEMENTS................................................... 82

         SECTION 8.1  Without Consent of Holders............................. 82
         SECTION 8.2  With Consent of Holders................................ 83
         SECTION 8.3  Compliance with Trust Indenture Act.................... 84
         SECTION 8.4  Revocation and Effect of Consents...................... 84
         SECTION 8.5  Notation on or Exchange of Securities.................. 85
         SECTION 8.6  Trustee To Sign Amendments............................. 85
         SECTION 8.7  Fixing of Record Dates................................. 85

                                   ARTICLE IX

REDEMPTION................................................................... 86

         SECTION 9.1  Notices to Trustee..................................... 86
         SECTION 9.2  Selection of Securities To Be Redeemed................. 86
         SECTION 9.3  Notice of Redemption................................... 87
         SECTION 9.4  Effect of Notice of Redemption......................... 88
         SECTION 9.5  Deposit of Redemption Price............................ 88
         SECTION 9.6  Securities Redeemed in Part............................ 88

                                    ARTICLE X

MISCELLANEOUS................................................................ 88

         SECTION 10.1  Trust Indenture Act Controls.......................... 88
         SECTION 10.2  Notices............................................... 89
         SECTION 10.3  Communication by Holders with Other Holders........... 90
         SECTION 10.4  Certificate and Opinion as to Conditions Precedent.... 90
         SECTION 10.5  Statements Required in Certificate or Opinion......... 90
         SECTION 10.6  Rules by Trustee and Agents........................... 91
         SECTION 10.7  Legal Holidays........................................ 91
         SECTION 10.8  Successors; No Recourse Against Others................ 91
         SECTION 10.9  Duplicate Originals................................... 91
         SECTION 10.10  Other Provisions..................................... 92
         SECTION 10.11  Governing Law........................................ 92

SIGNATURES................................................................... 93

EXHIBIT A....................................................................A-1

EXHIBIT B....................................................................B-1

EXHIBIT C....................................................................C-1

EXHIBIT D....................................................................D-1



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