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                                                                     Exhibit 4.5


      THIS WARRANT MAY NOT BE SOLD,  TRANSFERRED OR OTHERWISE DISPOSED OF EXCEPT
      AS SPECIFIED IN SECTION 15 HEREOF.  NEITHER THE RIGHTS REPRESENTED BY THIS
      WARRANT  NOR THE  SHARES  ISSUABLE  UPON THE  EXERCISE  THEREOF  HAVE BEEN
      REGISTERED FOR OFFER OR SALE UNDER THE SECURITIES ACT OF 1933. SUCH RIGHTS
      AND SHARES MAY NOT BE SOLD OR OFFERED  FOR SALE IN WHOLE OR IN PART EXCEPT
      IN ACCORDANCE WITH THE PROVISIONS OF SECTION 15 HEREOF.

                          BANGOR HYDRO-ELECTRIC COMPANY

                        Warrant to Purchase Common Stock

      BANGOR HYDRO-ELECTRIC COMPANY, a Maine corporation (the "Company"), hereby
certifies that, for value received, PERC Management Company Limited Partnership,
a Maine limited partnership,  is entitled, subject to the terms set forth below,
to purchase  from the Company  upon  surrender of this  Warrant,  at any time or
times on or after  June 26,  1998 but not after 4:00  P.M.,  Eastern  Prevailing
Time, on the Expiration Date, June 26, 2008, seven hundred twelve thousand eight
hundred and fifty-seven  (712,857) fully paid nonassessable shares (the "Warrant
Shares") of Common Stock, $5.00 par value, of the Company (as adjusted from time
to time as provided in this Warrant) at an initial  purchase  price of $7.00 per
share in lawful money of the United States.

                                   DEFINITIONS

      SECTION 1. (a) Definitions. The following words and terms as used in this
Warrant shall have the following meanings:

      "Affiliate"  shall mean, with respect to a Person,  any other Person that,
directly  or  indirectly  through  one  or  more  intermediaries,  controls,  is
controlled by, or is under common control with, such first Person.

      "Business Day" shall mean, except as otherwise  provided in the definition
of  "Market  Price",  a day other  than a  Saturday,  a Sunday or a day on which
banking  institutions in Maine are authorized or obligated by law or required by
executive order to be closed.

      "Change of Control" shall mean (i) any merger, consolidation,  arrangement
or  reorganization   of  the  Company  with  any  Person  whereby,   after  such
transaction,  holders of Shares of Common Stock prior to the transaction, do not
continue to own,  directly or indirectly,  at least a majority,  determined on a
fully-diluted  basis,  of the shares of the Voting  Stock of the  Company or the
surviving or resulting  corporation,  or (ii) any sale, lease or exchange of 50%
or more of the assets of the Company and its Subsidiaries,  taken as a whole, to
any Person. 

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      "Commission"   shall  mean  the  United  States  Securities  and  Exchange
Commission or the principal United States agency administering the United States
securities laws.

      "Common  Stock"  shall mean with  reference  to the Common Stock for which
Warrants are  exercisable,  only Common Stock of the class  existing on the date
hereof  and any stock  into which such  Common  Stock may  thereafter  have been
changed,  and,  when  otherwise  used  herein,  shall  include also stock of the
Company of any other class, whether now or hereafter authorized, which ranks, or
is entitled to a  participation,  as to assets or dividends,  substantially on a
parity with such  existing  Common Stock or other class of stock into which such
Common Stock have been changed.

      "Convertible  Securities"  shall mean any securities issued by the Company
that are convertible into or exchangeable for, directly or indirectly, shares of
Common Stock.

      "Expiration Date" shall mean June 26, 2008.

      "Holder"  shall mean the Person in whose name the Warrant set forth herein
is registered on the books of the Company maintained for such purpose.

      "Majority Holders" shall mean the holders of Warrants  exercisable for 50%
or more of the aggregate  number of shares of Common Stock then purchasable upon
exercise of all Warrants.

      "Market  Price" shall mean (a) the higher of (i) the highest  closing sale
price of the Common Stock on any domestic exchange on which the Common Stock may
be listed for the Business Day immediately  preceding,  or the last Business Day
that the Common  Stock  traded on such  exchange  prior to, the date as to which
"Market Price" is being determined and (ii) the average of the closing prices of
the Common Stock sales on all  domestic  exchanges on which the Common Stock may
at the time be listed or, if there shall have been no sales on any such exchange
on any day, the average of the reported bid prices on all such  exchanges at the
end of such day or, if on any day the Common  Stock shall not be so listed,  the
average of the  representative  bid prices quoted in the NASDAQ as of 3:30 P.M.,
New York prevailing  time, or if on any day the Common Stock shall not be quoted
in the  NASDAQ,  the  average  of the high and low bid prices on such day in the
domestic  over-the-counter  market as reported by the National Quotation Bureau,
Incorporated,  or any similar successor organization, in each such case averaged
over a period of 10 consecutive  Business Days (or other such period as shall be
specified  herein)  prior  to the  date as of  which  "Market  Price"  is  being
determined;  provided,  however,  that if the  Common  Stock  is  listed  on any
domestic  exchange  or the  NASDAQ  the  term  "Business  Day"  as  used in this
definition  shall mean any day on which such  exchange or the NASDAQ is open for
trading or (b) in the event the Common  Stock is not Publicly  Traded,  the fair
market  value of the Common  Stock as  determined  in good faith by the Board of
Directors of the Company;  provided,  however,  that such  determination  may be
challenged by any Holders and any dispute arising therefrom shall be resolved by
an investment bank of recognized standing selected by the Company and reasonably
satisfactory to such Holders whose


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determination  of the fair market  value of the Common  Stock shall be final and
binding on the parties;  and the fees and expenses  incurred by such  investment
bank in connection with its determination  shall, in the case it determines that
the  fair  market  value  of the  Common  Stock  is  (i)  90% or  more  of  such
determination of the Board of Directors, be borne by such Holders, and (ii) less
than  90% of such  determination  of the  Board  of  Directors,  be borne by the
Company.

      "Person"  shall mean an individual  or  corporation,  partnership,  trust,
incorporated or unincorporated association,  joint venture, joint stock company,
government  (or an agency or political  subdivision  thereof) or other entity of
any kind.

      "Public Offering" shall mean a firm underwritten  offering of Common Stock
registered  under the  Securities  Act of 1933 on Form  S-1,  S-2 or S-3 (or any
successor form) and offered generally to the public.

      "Publicly Traded" shall mean, with respect to any securities, listed on a
nationally recognized U.S. securities exchange or admitted for trading on the
NASDAQ.

      "Rule  144"  shall  mean  the  rule  of  such  number  promulgated  by the
Commission under the Securities Act and any successor rule thereto.

      "Voting  Stock"  shall  mean,  as applied to the stock (or the  equivalent
thereof)  of any  Person,  stock (or such  equivalent)  of any class or classes,
however designated,  having ordinary voting power for the election of at least a
majority of the board of  directors  (or other  governing  body) of such Person,
other than stock (or such  equivalent)  having  such power only by reason of the
happening of a contingency.

      "Warrant Exercise Price" shall mean initially $7.00 per share and shall be
adjusted and readjusted from time to time as provided in this Warrant.

      "Warrants" shall mean collectively the rights granted by this Warrant and
the rights granted by Warrants issued on June 26, 1998 to Municipal Review
Committee, Inc. and Energy National Inc.

      (b) Other  Definitional  Provisions.  (i)  Except as  otherwise  specified
herein,  all references herein (A) to any Person other than the Company shall be
deemed to include such Person's successors and assigns, (B) to the Company shall
be deemed to include the  Company's  successors  and (C) to any  applicable  law
defined or referred to herein shall be deemed  references to such applicable law
as the same may have been or may be amended or supplemented from time to time.

      (ii)  When  used  in  this  Warrant,  the  words  "herein",  "hereof"  and
"hereunder", and words of similar import, shall refer to this Warrant as a whole
and not to any provision of this Warrant,  and the words  "Section",  "Schedule"
and  "Exhibit"  shall refer to Sections of, and  Schedules and Exhibits to, this
Warrant unless otherwise specified.


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      (iii)  Whenever the context so requires,  the neuter  gender  includes the
masculine or feminine,  and the singular  number  includes the plural,  and vice
versa.

      SECTION  2.  Exercise  of  Warrant.  Subject  to the terms and  conditions
hereof,  this Warrant may be exercised,  in whole or in part, at any time during
normal  business  hours on or after the opening of business on June 26, 1998 and
prior to 4:00 P.M.,  Eastern Prevailing Time, on the Expiration Date. The rights
represented by this Warrant may be exercised by the Holder,  in whole or in part
(except that this Warrant shall not be exercisable as to a fractional share), by
(i)  delivery  of a  written  notice,  in the  form of the  Subscription  Notice
attached as Exhibit A, of the Holder's election to exercise this Warrant,  which
notice shall specify the number of Warrant Shares to be purchased,  (ii) payment
to the Company of an amount equal to the Warrant  Exercise  Price  multiplied by
the number of Warrant Shares as to which the Warrant is being  exercised in cash
or by certified or official bank check,  for the number of Warrant  Shares as to
which  this  Warrant  shall have been  exercised,  (iii) the  surrender  of this
Warrant,  properly endorsed,  at the principal office of the Company at 33 State
Street,  Bangor,  Maine (or at such other agency or office of the Company as the
Company may  designate  by notice to the Holder) and (iv) if the Warrant  Shares
issuable  upon the exercise of the rights  represented  by this Warrant have not
been registered under the Securities Act,  delivery to the Company by the Holder
of a letter in the form of Exhibit B hereto [unless in the opinion of counsel to
the Holder  reasonably  acceptable  to the Company  (delivered  to the  Company)
delivery  of such  letter is not  required].  If such  Warrant  Shares are to be
issued in any name other than that of the Holder or its nominee,  such  issuance
shall be deemed a transfer and the provisions of Section 15 shall be applicable.
In the event of any  exercise  of the  rights  represented  by this  Warrant,  a
certificate or certificates  for the Warrant Shares so purchased,  registered in
the name of,  or as  directed  by,  the  Holder,  shall be  delivered  to, or as
directed by, Holder within a reasonable  time,  not exceeding  five days,  after
such rights shall have been so exercised.  Unless the rights represented by this
Warrant shall have expired or have been fully exercised, the Company shall issue
a new Warrant  identical in all respects to the Warrant  exercised except (A) it
shall  represent  rights to purchase  the number of Warrant  Shares  purchasable
immediately prior to such exercise under the Warrant exercised,  less the number
of Warrant  Shares with respect to which such Warrant was  exercised and (B) the
Warrant  Exercise  Price  thereof  shall be the  Warrant  Exercise  Price of the
Warrant  exercised.  The Person in whose name any certificate for Warrant Shares
is issued upon exercise of this Warrant shall for all purposes be deemed to have
become  the holder of record of such  Warrant  Shares  immediately  prior to the
close of business on the date on which the Warrant was  surrendered  and payment
of the amount due in respect of such exercise was made, irrespective of the date
of  delivery  of  such  share  certificate,  except  that,  if the  date of such
surrender and payment is a date when the stock transfer books of the Company are
properly  closed,  such Person shall be deemed to have become the holder of such
Warrant Shares at the opening of business on the next  succeeding  date on which
the stock transfer books are open.

      SECTION 3. Covenants as to Common Stock. The Company covenants and agrees
that all Warrant Shares that may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance, be validly issued, fully paid
and nonassessable. The Company further


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covenants and agrees that during the period within which the rights  represented
by this Warrant may be exercised,  the Company will at all times have authorized
and  reserved a  sufficient  number of shares of Common Stock to provide for the
exercise of the rights then  represented  by this Warrant and that the par value
of said shares will at all times be less than the  applicable  Warrant  Exercise
Price.

      SECTION 4.  Adjustment of Warrant  Exercise Price and Adjustment of Number
of Shares.  The  number of shares and  Warrant  Exercise  Price of Common  Stock
issuable  upon  exercise of this  Warrant  shall be subject to  adjustment  on a
weighted  average basis to prevent  dilution,  (a) in the event that the Company
issues  additional  Common Stock at less than the Market Price as of the date of
issue (other than pursuant to this Warrant), or rights,  warrants, or options to
acquire  Common  Stock  at less  than the  Market  Price as of the date of issue
(other than shares reserved for issuance to employees or directors);  (b) in the
event that the Company issues  securities  convertible  into or exchangeable for
Common Stock at less than the equivalent  Market Price of the Common Stock as of
the  date of  issue;  (c) in the  event  that  the  Company  declares  any  cash
distributions other than from current earnings;  or (d) upon stock splits, stock
dividends, divisions, combinations,  reorganizations,  reclassifications, or any
other  event  which is  similar  in effect  to any of the  events  described  in
subsections (a) through (d) hereof.

      SECTION 5.  Reorganizations.  (a) Reorganization or  Reclassification.  In
case of any capital  reorganization  or of any  reclassification  of the Capital
Stock of the  Company  (other than a change in par value or from par value to no
par value or from no par value to par  value),  this  Warrant  shall,  upon such
capital  reorganization or reclassification,  entitle the Holder to purchase the
kind and number of shares of stock or other securities or cash,  assets or other
property  of the  Company to which the Holder  would have been  entitled  if the
holder had held the Common Stock issuable upon the exercise  hereof  immediately
prior to such capital reorganization or reclassification.

      (b) Change of  Control.  In case of any Change of  Control,  this  Warrant
shall  entitle the holder,  immediately  and at all times  thereafter  until the
Expiration  Date, to exercise this Warrant and to receive the kind and number of
shares of stock or other  securities  or cash,  assets or other  property of the
Person  resulting  from or surviving  such Change of Control to which the holder
would have been  entitled if the holder had held the Common Stock  issuable upon
the exercise  hereof  immediately  prior to such Change of Control.  The Company
shall not effect any such Change of Control unless,  prior to or  simultaneously
with the consummation  thereof, the successor Person (if other than the Company)
resulting from such Change of Control or the corporation  purchasing such assets
shall  assume by written  instrument  executed  and mailed or  delivered  to the
holder the obligation to deliver to the holder such shares of stock, securities,
cash, assets or other property as, in accordance with the foregoing  provisions,
such Holder may be entitled to receive upon the exercise of this Warrant.

      (c) Applicable Provisions. In case of either paragraph (a) or (b) of this
Section 5, appropriate provision shall be made with respect to the rights and
interests of the holder to the end that the provisions hereof (including without
limitation provisions for adjustment of the


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Warrant Exercise Price and of the number of shares purchasable upon the exercise
of this Warrant) shall thereafter be applicable, as nearly as may be in relation
to any shares of stock,  securities or assets  thereafter  deliverable  upon the
exercise of the rights represented hereby.

      SECTION 6. Notice of Warrant  Exercise  Price.  The Company shall annually
give a notice to the Holder, which notice shall state the Warrant Exercise Price
in  effect  and the  increase  or  decrease,  if any,  in the  number  of shares
purchasable  at the Warrant  Exercise  Price upon the exercise of this  Warrant,
setting forth in reasonable  detail the method of calculation and the facts upon
which such calculation is based.

      SECTION  7.  Computation  of  Adjustments.  Upon  each  computation  of an
adjustment  to the Warrant  Exercise  Price and the number of shares that may be
subscribed for and purchased upon exercise of this Warrant, the Warrant Exercise
Price shall be computed to the nearest cent (i.e., fractions of 0.5 of a cent or
greater,  shall be  rounded to the next  highest  cent) and the number of shares
that may be subscribed  for and purchased upon exercise of this Warrant shall be
calculated to the nearest whole share (i.e.,  fractions of less than one half of
a share shall be  disregarded  and  fractions  of one half of a share or greater
shall be  treated as being a whole  share).  No such  adjustment  shall be made,
however,  if the change in the Warrant  Exercise  Price would be less than $0.01
per  share,  but any such  lesser  adjustment  shall be made (i) at the time and
together  with  the  next  subsequent   adjustment  which,   together  with  any
adjustments carried forward, shall amount to $0.01 per share or more, or (ii) if
earlier,  upon the third  anniversary of the event for which such  adjustment is
required.

      SECTION 8. Notice of Certain Events. In case at any time:

      (a) the Company shall make any distribution in respect of its Common Stock
(other than the payment of a cash dividend from current earnings);

      (b) the Company  shall  propose to register  any of its Common Stock under
the  Securities  Act in connection  with a public  offering of such Common Stock
(other than with respect to a registration  statement filed on Form S-8 or other
such similar form then in effect under the Securities Act);

      (c) the Company  shall offer for  subscription  pro rata to the holders of
its Common Stock any additional shares of stock of any class or other rights;

      (d) there shall be any capital reorganization, or reclassification of the
capital stock, of the Company, or Change of Control; or

      (e) there shall be a voluntary or involuntary dissolution, liquidation or
winding up of the Company;

then,  in any one or more of said cases,  the  Company  shall give notice to the
Holder of the date on which (i) the books of the Company shall close or a record
shall be taken for such distribution or


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subscription  rights or (ii) such  reorganization,  reclassification,  Change of
Control,  dissolution,  liquidation or winding up shall take place,  as the case
may be. Such notice shall be given not less than  twenty-one  (21) days prior to
the record date or the date on which the transfer books of the Company are to be
closed in respect  thereto in the case of an action  specified in clause (i) and
at least  forty-five (45) days prior to the action in question in the case of an
action specified in clause (ii).

      SECTION 9. No Change in Warrant Terms on Adjustment.  Irrespective  of any
adjustment in the Warrant Exercise Price or the number of shares of Common Stock
issuable upon exercise hereof,  this Warrant,  whether theretofore or thereafter
issued or reissued,  may continue to express the same price and number of shares
as are stated  herein and the Warrant  Exercise  Price and such number of shares
specified herein shall be deemed to have been so adjusted.

      SECTION 10. Limitation on Right to Exercise Warrants.  Notwithstanding the
rights to exercise the Warrant granted herein, other than as provided in Section
5, the Holder may exercise this Warrant only to the following extent: (a) 25% of
the Warrants  initially granted hereunder may be exercised on or after March 26,
1999; (b) 50% of the Warrants initially granted hereunder may be exercised on or
after March 26, 2000; (c) 75% of the Warrants initially granted hereunder may be
exercised on or after March 26, 2001; (d) 100% of the Warrants initially granted
hereunder may be exercised on or after March 26, 2002.

      SECTION 11. Registration Rights. (a) Required  Registration.  Upon written
request by Majority Holders,  the Company shall use its best efforts to register
and to maintain in effect for a period of one year,  pursuant to the  Securities
Act of 1933,  the Common Stock for which  Warrants are  exercisable or have been
exercised.  The Company's Board of Directors may, upon determining that there is
a valid business reason for doing so, delay filing a Registration  Statement for
up to 120 days  after  receipt  of the  written  request.  Upon  receipt of such
written  request,  the Company  shall notify all holders of Warrants that such a
request has been made and shall provide all holders  reasonable  opportunity  to
include Common Stock in the registration. If on the date of such written request
the  Company  has filed or notifies  the  Majority  Holders it intends to file a
Registration  Statement  pursuant to the Securities Act of 1933 within 120 days,
the requirements of this subsection will be met by the inclusion of Common Stock
within  the  Registration  Statement  filed  or  to  be  filed.  Upon  filing  a
Registration  Statement  pursuant to this subsection,  the Company shall have no
obligation to file additional Registration Statements at the request of Majority
Holders for a period of one year.

      (b) Incidental  Registration.  If the Company  proposes to register any of
its common stock  pursuant to the  Securities  Act of 1933 in connection  with a
public  distribution  of  that  stock,  other  than  pursuant  to  a  merger  or
acquisition  for  stock  or  pursuant  to  an  employee   benefits,   option  or
compensation  plan (unless such plans in the aggregate  provide for the issuance
of more than 10% of the Company's then outstanding  common stock), it shall give
notice to all  holders  of  Warrants  and give them  reasonable  opportunity  to
participate in the registration.


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      (c)  Tag-Along  Rights.  If the Company  shall propose to issue and if any
single entity shall propose to acquire  securities of the Company  having voting
power equal to or more than the voting power of the then  outstanding  shares of
the  Company,  the Company  may not accept the offer of such entity  unless such
entity shall  simultaneously  make an offer to purchase this warrant,  or all of
the shares  underlying  this  warrant  and all other  warrants  of this class of
warrant, or all of the shares underlying such warrants,  which is accepted by at
least one of the  holders  of this  class of  warrants.  Such  purchase  must be
simultaneous  with the purchase of the securities to be issued by the Company to
such entity.

      (d) Costs of Registration. All costs of registration shall be paid by the
Company.

      SECTION 12. Options at the Time of Exercise.  (a) Company's  Option to Pay
Cash in Lieu of Issuing  Common Stock.  Upon the exercise of this  Warrant,  the
Company may elect, at its option, to give the Holder immediate notice and to pay
the Holder within ten (10) business days a sum of cash in lieu of Issuing Common
Stock as  provided  in Section 2. The amount of cash  payable  pursuant  to this
subsection  shall be calculated by subtracting  the Warrant  Exercise Price from
the  Market  Price on the date of  exercise  and  multiplying  the result by the
number of shares of Common Stock as to which exercise is being made. At the time
of making any payment  pursuant to this Section,  the Company shall repay to the
Holder any amounts paid in connection with the exercise of the Warrant  pursuant
to Section 2. The Company may  exercise  this option only if in doing so it does
not violate any material covenants contained in any of its financing  agreements
that have not been waived.

      (b) Cashless Exercise. At the time of exercise of this Warrant, the Holder
may elect to exercise the option  provided in this  subsection in lieu of making
the cash  payment  required by Section 2. Upon  written  notice of its desire to
exercise this option given at the same time and in the same manner as the notice
specified  in Section 2, the Holder shall be entitled to the issuance of Warrant
Shares (in lieu of the Warrant Shares otherwise issuable pursuant to Section 2),
the number of which  shall be  calculated  as  follows:  the  product of (x) the
number of shares as to which the Warrant is being  exercised and (y) a fraction,
the numerator of which is the Market Price of the Common Stock minus the Warrant
Exercise  Price and the  denominator  of which is the Market Price of the Common
Stock.

      SECTION 13. Warrant Holder Not Deemed a Shareholder. Except as provided in
Section 8, no Holder, as such, shall be entitled to vote or receive dividends or
be  deemed  the  holder  of shares of the  Company  for any  purpose,  nor shall
anything  contained in this  Warrant be construed to confer upon the Holder,  as
such,  any of the rights of a  shareholder  of the Company or any right to vote,
give or withhold  consent to any corporate  action (whether any  reorganization,
issue  or  reclassification  of  stock,  consolidation,  merger,  conveyance  or
otherwise),  receive  notice of  meetings,  receive  dividends  or  subscription
rights,  or  otherwise,  prior to the  issuance  of record to the  Holder of the
Warrant  Shares  which it is then  entitled to receive  upon the due exercise of
this Warrant.

      SECTION 14. No Limitation on Corporate Action; No Avoidance of Terms.


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      (a) No  provisions  of this  Warrant  and no right or  option  granted  or
conferred  hereunder  shall in any way limit,  affect or abridge the exercise by
the Company of any of its corporate rights or powers to recapitalize,  amend its
charter,  reorganize,  consolidate or merge with or into another corporation, or
to transfer  all or any part of its  property or assets,  or the exercise of any
other of its corporate rights and powers.

      (b) The Company shall not by any action,  including,  without  limitation,
amending its articles of incorporation or through any  reorganization,  transfer
of assets, consolidation,  merger or arrangement,  dissolution, issue or sale of
securities or any other voluntary action,  avoid or seek to avoid the observance
or  performance  of any of the terms of this  Warrant,  but will at all times in
good faith assist in the carrying out of all such terms and in the taking of all
such  actions as may be necessary  or  appropriate  to protect the rights of the
Holder against impairment. Without limiting the generality of the foregoing, the
Company will take all such action as may be necessary  or  appropriate  in order
that the Company may  validly  and  legally  issue fully paid and  nonassessable
shares of Common Stock upon the exercise of this Warrant.

      SECTION 15. Transfer; Opinions of Counsel; Restrictive Legends.

      (a) Prior to any sale,  transfer or other  disposition  of this Warrant or
the Warrant  Shares,  the Holder thereof will give seven (7) days' notice to the
Company  of its  intention  to effect  such  transfer.  Each such  notice  shall
describe  the manner and  circumstances  of the  proposed  transfer and shall be
accompanied by an opinion of counsel for the Holder  reasonably  satisfactory to
the Company,  addressed to the Company and reasonably  satisfactory  in form and
substance to it stating that, in the opinion of such counsel, such transfer is a
transaction exempt from registration under the Securities Act.

      (b) If such sale,  transfer  or other  disposition  may, in the opinion of
such counsel,  be effected  without  registration  under the Securities Act, the
holder  shall  thereupon  be entitled to transfer  this  Warrant and the Warrant
Shares in accordance with the terms of the notice delivered by the Holder to the
Company.  If, in the opinion of such counsel,  such transfer may not be effected
without  registration under the Securities Act, the Holder shall not be entitled
to so transfer this Warrant or the Warrant  Shares unless (i) the Company elects
to file a  registration  statement  relating to such proposed  transfer and such
registration statement has become effective under the Securities Act or (ii) the
provisions of Section 11 apply.

      (c)  Notwithstanding  the provisions of this Section 15, the Holder may at
any time  transfer  this  Warrant or the Warrant  Shares to an  Affiliate  or an
Associate (as such term is defined in Section 12b-2 of the  Securities  Exchange
Act of 1934, as amended) of the Holder.

      (d)(i) Except as otherwise  provided in this Section 15, each  certificate
for Warrant Shares initially issued upon the exercise of this Warrant,  and each
certificate  for Warrant Shares issued to any subsequent  transferee of any such
certificate,  shall be stamped or otherwise imprinted with a legend stating that
the shares represented by such certificate have not been


                                      -9-
   10

registered under the Securities Act of 1933 and may not be transferred except in
accordance  with the  provisions of the Securities Act of 1933 and Section 15 of
this Warrant.

      (ii) Except as otherwise  provided in this Section 15, each Warrant  shall
be stamped or otherwise  imprinted with a legend stating that neither the rights
represented  by the Warrant nor the shares  issuable  upon the exercise  thereof
have been  registered  under the Securities Act of 1933 and that such rights and
shares may not be  transferred  except in accordance  with the provisions of the
Securities Act of 1933 and Section 15 of this Warrant.

      (e) Termination of Restrictions. The restrictions imposed by Section 15(a)
and  the  legend  requirements  of  Section  15(d)  shall  terminate  as to  any
particular  Warrant or Warrant Share (i) when and so long as such security shall
have been  effectively  registered under the Securities Act of 1933 and disposed
of in a public sale or distribution  pursuant  thereto,  (ii) when such security
shall  have been  disposed  of in  accordance  with  Rule 144 or (iii)  when the
Company shall have received opinions of counsel  reasonably  satisfactory to it,
which opinions shall be  satisfactory  in substance and form to the Company,  to
the effect that such  restrictions on transfer pursuant to the Securities Act of
1933 no longer apply.  Whenever said restrictions and legend  requirements shall
terminate  as to this  Warrant,  as  hereinabove  provided,  the Holder shall be
entitled  to receive  from the  Company,  at the expense of the  Company,  a new
Warrant bearing a legend in place of the restrictive legend described in Section
15(d) stating that the restrictions on  transferability of the Warrant have been
terminated. Whenever the restrictions imposed by this Section 15 shall terminate
as to any Warrant Share,  as hereinabove  provided,  the holder thereof shall be
entitled  to  receive  from  the  Company,  at  the  Company's  expense,  a  new
certificate  representing  such Common Stock not bearing the restrictive  legend
described in Section 15(d).

      SECTION 16.  Exchange of Warrant.  This Warrant is  exchangeable  upon the
surrender  hereof by the Holder at the office or agency of the Company,  for new
Warrants of like tenor  representing in the aggregate the right to subscribe for
and  purchase  the number of shares which may be  subscribed  for and  purchased
hereunder  from time to time after giving effect to all the  provisions  hereof,
each of such new Warrants to represent  the right to subscribe  for and purchase
such number of shares as shall be designated by the Holder hereof at the time of
such surrender.

      SECTION 17. Lost, Stolen,  Mutilated or Destroyed Warrant. If this Warrant
is lost, stolen,  mutilated or destroyed,  the Company shall, upon receipt by it
of indemnity  satisfactory to it, issue a new Warrant of like  denomination  and
tenor as the  Warrant so lost,  stolen,  mutilated  or  destroyed.  Any such new
Warrant  shall  constitute  an original  contractual  obligation of the Company,
whether or not the allegedly lost, stolen,  mutilated or destroyed Warrant shall
be at any time enforceable by anyone.

      SECTION 18. Division and Combination.  Subject to Section 15, this Warrant
may be divided or combined with other Warrants upon  presentation  hereof at the
office or agency of the Company,  together with a written notice  specifying the
names and  denominations  in which new Warrants are to be issued,  signed by the
Holder or its agent or attorney. Subject to compliance


                                      -10-
   11

with  Section 15, as to any transfer  which may be involved in such  division or
combination,  the Company shall execute and deliver a new Warrant or Warrants in
exchange  for the Warrant or  Warrants  to be divided or combined in  accordance
with such  notice.  The  Company  shall  prepare,  issue and  deliver at its own
expense the new Warrant or  Warrants  under each of Section 15 and this  Section
18.

      SECTION 19. Maintenance of Books. The Company agrees to maintain, at its
office or agency, books for the registration and the registration of transfer of
the Warrants.

      SECTION 20. [Intentionally Omitted.]

      SECTION  21.  Notice.  All  notices  and other  communications  under this
Warrant  shall (a) be in writing,  (b) be (i) sent by  registered  or  certified
mail,  postage prepaid,  return receipt requested or (ii) delivered by hand, (c)
be given at the  following  respective  addresses  and to the  attention  of the
following Persons:

            (i)   if to the Company, to it at:

                  Bangor Hydro-Electric Company
                  33 State Street
                  P.O. Box 932
                  Bangor, Maine  04402-0932

                  Attention: President

            (ii)  if to the initial Holder, to it at:

                  PERC Management Company Limited Partnership
                  c/o KTI, Inc.
                  7000 Boulevard East
                  Guttenberg, NJ  07093

                  Attention: President

or to such other  address or to the  attention of such other person as the party
to whom such  information  pertains may  hereafter  specify for the purpose in a
notice to the other specifically captioned "Notice of Change of Address" and (d)
be effective or deeded delivered or furnished (i) if given by mail, on the fifth
Business Day after such  communication  is  deposited in the mail,  addressed as
above provided and (ii) if given by hand delivery, when left with an employee of
the  addressee  at the address of the  addressee  addressed  as above  provided,
except that notices of a change of address shall not be deemed  furnished  until
received.

      SECTION 22. Miscellaneous. This Warrant and any term hereof may not be
changed, waived, discharged, or terminated except by an instrument in writing
signed by the party or


                                      -11-
   12

holder hereof  against which  enforcement of such change,  waiver,  discharge or
termination  is  sought.  The  headings  in this  Warrant  are for  purposes  of
reference only and shall not limit or otherwise affect the meaning hereof.

      SECTION 23. Date. The date of this Warrant is June 26, 1998. This Warrant,
in all events, shall be wholly void and of no effect after the close of business
on the Expiration Date, except that notwithstanding any other provisions hereof,
the  provisions  of Sections  11 and 15 shall  continue in full force and effect
after such date as to any  Warrant  Shares or other  securities  issued upon the
exercise of this Warrant.

      SECTION 24. Governing Law. This Warrant shall be construed in accordance
with and governed by the laws of the State of Maine, excluding those applicable
to choice of law.

      IN WITNESS WHEREOF,  the Company has caused this Warrant to be executed by
its duly authorized officers as of this June 26, 1998.

                                    BANGOR HYDRO-ELECTRIC COMPANY



                                    By: /s/ Frederick S. Samp
                                        ----------------------------------------
                                    Its: Vice President - Finance & Law


                                      -12-
   13

                                                                       Exhibit A
                                                                      to Warrant

                               SUBSCRIPTION NOTICE

                 TO BE EXECUTED BY THE REGISTERED HOLDER IF SUCH
                     HOLDER DESIRES TO EXERCISE THIS WARRANT

                          BANGOR HYDRO-ELECTRIC COMPANY

      The  undersigned  hereby  exercises the right to purchase  Warrant  Shares
covered by this Warrant  according to the conditions  thereof and herewith makes
payment of  $____________,  the aggregate Warrant Exercise Price of such Warrant
Shares, in full.

                                    [NAME OF HOLDER]



                                       By:
                                     Title:



                                    Number of
                              Warrant Shares Being
                                    Purchased

Dated:__________________________, 19[20]
   14

                                                                       Exhibit B
                                                                      to Warrant

Attention:

      Re:   Exercise of Warrant, dated

Dear Sirs:

      In connection  with the  undersigned's  purchase of Common Stock of Bangor
Hydro-Electric  Company upon  exercise of a warrant  therefor,  the  undersigned
confirms and agrees as follows:

            1. As the  purchaser  of the  shares  of  Common  Stock in a private
      placement not registered under the Securities Act of 1933, as amended (the
      "Act"),  the undersigned is purchasing such shares for its own account for
      investment  and (subject to the  disposition  of its property being at all
      times within its control) not with a view to any resale,  distribution  or
      other  disposition  thereof,  and the  undersigned  is  proceeding  on the
      assumption  that it must bear the economic risk of the  investment  for an
      indefinite period, since the shares of Common Stock may not be sold except
      as provided in paragraph 2 below.

            2. The  undersigned  agrees that,  if in the future the  undersigned
      should  decide to dispose of the shares of Common Stock (such  disposition
      not being presently  foreseen or  contemplated),  the undersigned will not
      offer,  sell,  transfer or exchange  such shares of Common  Stock,  except
      under  conditions  that  would  not  violated  the  Act or any  applicable
      securities laws.

            3. The undersigned is purchasing the shares of Common Stock pursuant
      to an exemption  from the  registration  requirements  of the Act and from
      registration  or   qualification   requirements   under  applicable  state
      securities laws.

      If  administrative  or legal  proceedings  are  commenced or threatened in
connection  with  which this  notice is or would be  relevant,  the  undersigned
irrevocably authorizes Bangor Hydro-Electric Company to produce this notice or a
copy thereof to any interested party in such proceedings.

Date:

                                    [NAME OF HOLDER]



                                       By:
                                     Title: