1
                                                                     Exhibit 4.7


                             SURPLUS CASH AGREEMENT

      This  Agreement  dated  as of June  26,  1998 is  among  Penobscot  Energy
Recovery  Company,  Limited  Partnership,   a  Maine  limited  partnership  (the
"Partnership"),  Bangor  Hydro-Electric  Company,  a Maine corporation  ("Bangor
Hydro") and Municipal Review Committee, Inc., a Maine not-for-profit corporation
(the "MRC").

      WHEREAS,  the Partnership and the Finance Authority of Maine ("FAME") have
entered  into a Loan  Agreement  pursuant  to which FAME has agreed to issue its
Electric Rate  Stabilization  Revenue  Refunding Bonds,  Series 1998A (Penobscot
Energy Recovery  Company,  LP) in the aggregate  principal amount of $29,930,000
(the  "Series A Bonds" and its Electric  Rate  Stabilization  Revenue  Refunding
Bonds,  Series 1998B (Penobscot  Energy Recovery  Company,  LP) in the aggregate
principal  amount of  $15,065,000  (the "Series B Bonds" and,  together with the
Series A Bonds, the "Bonds") pursuant to the Trust Indenture dated as of June 1,
1998 (the  "Indenture")  between FAME and The Chase  Manhattan  Bank, as Trustee
(the "Trustee"); and

      WHEREAS, the Partnership and Bangor Hydro entered into a Power Purchase
Agreement dated June 21, 1984, as amended by Amendment No. 1 dated March 24,
1986 and as further amended by Amendment No. 2 (the "Power Purchase Agreement
Amendment No. 2") dated as of the date hereof (collectively, the "Power Purchase
Agreement"); and

      WHEREAS, the MRC is the designated agent for certain municipalities in the
State of Maine which have entered into with the  Partnership  the First  Amended
and Restated  Waste  Disposal  Agreements  on effective as of April 1, 1991 (the
"Charter  Municipalities")  and Second  Amended,  Restated  and  Extended  Waste
Disposal  Agreements  (the  "Extended  Waste  Disposal  Agreements")  in 1998 in
connection   with  the   issuance   of  the   Bonds   (the   "Amending   Charter
Municipalities); and

      WHEREAS, under Article XIX of the Extended Waste Disposal Agreements,  the
Amending Charter Municipalities,  acting through the MRC pursuant to paragraph E
of  Article  XII,  have the option to  participate  in the  purchase  of limited
partnership interests in the Partnership, with the purchase price payable from a
designation  of  Performance  Credits (as defined in the Extended Waste Disposal
Agreements),  and under  paragraph B of Article XVIII and  paragraph  C.3.III of
Article XIX, funds credited to the MRC Prepayment Account in the Bond Prepayment
and Reserve  Fund from  Revenues (as defined in and pursuant to Article V of the
Indenture) or deposited therein by the MRC from designated  Performance  Credits
and either (i) transferred to the Special Redemption Account of the Debt Service
Fund to redeem  "Series 1998B Special Term Bonds" (as defined in the  Indenture)
prior to their stated maturity date, or (ii) used to purchase and cancel,  or to
defease or otherwise  optionally  redeem,  Bonds prior to their stated  maturity
date; and

      WHEREAS, the distribution to the MRC constitutes the Performance Credits


                                      -1-
   2

contemplated  in Article XVIII of the Extended Waste Disposal  Agreement and the
calculation  of such  Performance  Credits  needs to be  adjusted as a result of
additional  reserve accounts required by FAME in connection with the issuance of
the Bonds, as contemplated in paragraph A of Article XVIII of the Extended Waste
Disposal Agreement and approved by the MRC; and

      WHEREAS, under the Power Purchase Agreement,  Bangor Hydro is obligated to
pay  $250,000  on the  first  day of each  January,  April,  July  and  October,
commencing  October 1, 1998,  until the amount paid equals  $4,000,000,  by wire
transfer  to the Trustee  for credit to the Bangor  Hydro-Funded  Account of the
Bond Prepayment and Reserve Fund (the "Bangor Hydro Payment"); and

      WHEREAS, under Section 5.01 of the Indenture,  the Trustee has established
certain  Trust  Funds,  including  the  Special  Redemption  Account of the Debt
Service  Fund and the Bond  Prepayment  and Reserve Fund  consisting  of (1) the
Bangor Hydro-Funded  Account (consisting of the MRC Retention Subaccount and the
Borrower  Retention  Subaccount),  (2) the MRC Prepayment  Account,  and (3) the
Borrower Reserve Account; and

      WHEREAS,  Section 5.03 of the Indenture  provides for the  application  of
Revenues  on the  fifteenth  day of each  calendar  month  (each  an  "Indenture
Distribution  Date"),  and any balance remaining after  application  pursuant to
clauses (1) through (9) and the funding of certain  Accounts  pursuant to clause
(10) of said Section 5.03 is paid to or at the direction of the  Partnership for
distribution among the Partnership, Bangor Hydro and the MRC; and

      WHEREAS,  the parties hereto desire to set forth herein their agreement of
the  distribution  of (i) the  Allocable  Funds  after  accounting  for  Reserve
Deposits,  (ii) interest on various reserve funds held under the Indenture,  and
(iii)  Indenture  Residual  paid by the  Trustee to or at the  direction  of the
Partnership under the Indenture.

      NOW, THEREFORE,  for good and valuable  consideration,  the parties hereto
hereby agree as follows:

      Section 1. Definitions. Capitalized terms used herein and not otherwise
defined have the meanings given such terms in the Indenture. In addition, the
following terms, as used herein, have the following meanings:

            "Allocable Funds" means, as of any Indenture  Distribution Date, the
      Revenue Fund Balance,  less  reimbursements of the Partnership and the MRC
      under Section 4(a) of this  Agreement for  withdrawals by the Trustee from
      the Borrower Reserve Account,  the Borrower  Retention  Subaccount and the
      MRC Reserve  Accounts,  and less the  Prepayment  Benefit (if any) for the
      Monthly Period ended on such Indenture Disbursement Date.

            "Bangor Hydro  Payment" has the meaning given such term in the sixth
      WHEREAS clause above.


                                      -2-
   3

            "Bond Documents" means the Indenture and the Financing Documents.

            "ENI" means  Energy  National,  Inc.,  a Utah  corporation,  and its
      successors or assigns as a general or limited partner in the Partnership.

            "Funding Date Partners"  means the partners of the  Partnership  (as
      their respective  interests are then reflected on the books and records of
      the Partnership) on each Indenture Distribution Date from July 15, 1998 to
      the date on which  the  aggregate  amount  of all  deposits  made into the
      Borrower Reserve Account under Section 5.03(b)(10)(iv) is $2,500,000.

            "Indenture Residual" has the meaning given such term in Section 6
      hereof.

            "Issue Date Partners" means PMC and ENI.

            "MRC  Reserve  Accounts"  means  collectively,   the  MRC  Retention
      Subaccount  in the Bangor  Hydro-Funded  Account,  and the MRC  Prepayment
      Account, of the Bond Prepayment and Reserve Fund.

            "Monthly   Period"   means  a  period   beginning  on  an  Indenture
      Distribution Date and ending on the next succeeding Indenture Distribution
      Date.

            "PMC" means PERC  Management  Company Limited  Partnership,  a Maine
      limited partnership, and its successors or assigns as a general or limited
      partner in the Partnership.

            "Prepayment  Benefit"  means,  for any period of  determination,  an
      amount equal to (i) the interest and the Capital  Reserve  Premium payable
      to the  Authority  that would have been  payable on the Bonds  during such
      period if no Bonds had been optionally redeemed,  purchased or defeased as
      contemplated  by Section 7 of this  Agreement,  less (ii) the interest and
      the Capital  Reserve  Premium payable to the Authority paid on outstanding
      Bonds during such period.

            "Reserve Deposits" means, as of any Indenture Distribution Date, the
      aggregate  amount of the Revenue Fund Balance  credited by the Trustee (i)
      to the MRC Retention  Subaccount  pursuant to Section  5.03(10)(i)  of the
      Indenture;  (ii) to the Borrower Retention  Subaccount pursuant to Section
      5.03(10)(ii)  of the  Indenture;  (iii)  to  the  MRC  Prepayment  Account
      pursuant  to  Section  5.03(10)(iii)  of the  Indenture;  and  (iv) to the
      Borrower  Reserve  Account   pursuant  to  Section   5.03(10)(iv)  of  the
      Indenture.

            "Revenue  Fund  Balance" has the meaning  given such term in Section
      5.03(10) of the  Indenture;  namely,  it is the balance of the Revenues in
      the Revenue Fund on each Indenture  Distribution Date after application of
      Revenues  by the  Trustee  pursuant  to clauses  (1)  through  (9) of said
      Section 5.03 of the Indenture.


                                      -3-
   4

      Section 2. Bangor Hydro Payments. Bangor Hydro shall pay, by wire transfer
or in other immediately available funds, to the Trustee for credit to the Bangor
Hydro-Funded  Account of the Bond  Prepayment and Reserve Fund, the Bangor Hydro
Payment, one-half of which is to be designated by Bangor Hydro for credit to the
MRC  Retention  Subaccount  and one-half of which is to be  designated by Bangor
Hydro for credit to the Borrower Retention Subaccount.

      Section 3. Investment of MRC Accounts; Interest Earnings.

            (a) Under Section 5.12 of the  Indenture,  the  Partnership  has the
      right to direct the  investment,  from time to time,  of the various Trust
      Funds, including the MRC Reserve Accounts, in Eligible Investments, and as
      of the date hereof the  Partnership  has provided the Trustee with written
      investment  instructions  and  intends to do so from time to time,  in its
      discretion,   except  that  upon  the  Partnership's  receipt  of  written
      instructions of the MRC, the  Partnership  agrees to direct the Trustee to
      invest funds in the MRC Reserve Accounts, or either of them, in accordance
      with such instructions,  provided that such investment instructions comply
      with  the  provisions  of  Section  5.12  of the  Indenture  and  the  Tax
      Regulatory  Agreement.  The MRC hereby agrees and  acknowledges  that such
      investments may be made with or through the Trustee or its affiliates, and
      neither the Trustee nor the Partnership shall be responsible or liable for
      any losses  incurred  or  realized by the  investment  of such  Account or
      Subaccount so long as such investments  qualify as "Eligible  Investments"
      as required under the Indenture.

            (b) Under Section  5.12(b)(iii) of the Indenture,  interest earnings
      on  funds  credited  to  the  Special  Redemption  Account  and  the  Bond
      Prepayment and Reserve Fund are to be distributed from time to time at the
      direction  of  the   Partnership.   The  parties  hereto  agree  that  the
      Partnership  shall direct the Trustee to distribute such interest earnings
      as follows:  (i) on the Special Redemption Account, as and when earned, to
      the Partnership;  (ii) on the Borrower Retention  Subaccount,  as and when
      earned, to the Issue Date Partners; (iii) on the Borrower Reserve Account,
      as and when  earned,  to the Funding  Date  Partners;  and (iv) on the MRC
      Reserve  Accounts,  as and  when  earned,  to the MRC  unless  the MRC has
      provided the Partnership  with written  instructions to direct the Trustee
      to retain such amounts  therein,  or to transfer  such amounts (in minimum
      increments  as  specified in Section 7 of this  Agreement)  to the Special
      Redemption Account.

      Section 4. Distribution of Revenue Fund Balance. After applications of the
Revenue  Fund Balance  pursuant to Section  5.03(10) of the  Indenture  (that is
after any Reserve Deposits), the Trustee pays the balance to or at the direction
of the Partnership on each Indenture Distribution Date. The parties hereto agree
that the Partnership shall direct the Trustee to disburse the balance payable to
the Partnership on an Indenture Disbursement Date, as follows:

            (a) First, pro rata to the Issue Date Partners, an amount equal to
      any amounts


                                      -4-
   5

      theretofore  withdrawn by the Trustee from the  Borrower  Reserve  Account
      under  Section  5.10(a)(2)  of  the  Indenture  and to  the  Funding  Date
      Partners,  an amount  equal to any amounts  theretofore  withdrawn  by the
      Trustee from the Borrower Retention Subaccount under Section 5.10(a)(2) of
      the Indenture to pay  deficiencies  in the Debt Service  Fund,  until such
      partners have been fully reimbursed for all such amounts  withdrawn by the
      Trustee,  and to the  MRC,  an  amount  equal to any  amounts  theretofore
      withdrawn  by the Trustee  from the MRC  Reserve  Accounts  under  Section
      5.10(a)(2) of the Indenture to pay  deficiencies  in the Debt Service Fund
      (but not  including  any  transfers to the Special  Redemption  Account or
      otherwise to optionally  redeem Bonds under Section  2.04(c) or (d) of the
      Indenture or to purchase and cancel or defease  Bonds),  until the MRC has
      been  fully  reimbursed  for all  amounts  so  withdrawn  by the  Trustee;
      provided  that if the  balance  of funds  available  for such  purpose  is
      insufficient to make such payments in full to the Issue Date Partners, the
      Funding Date Partners and the MRC, then it shall be paid to the Issue Date
      Partners and the Funding  Date  Partners (on one hand) and the MRC (on the
      other hand) on a pro rata basis.

            (b) Second, to the Partnership,  the Prepayment Benefit (if any) for
      the Monthly Period ended on such Indenture Disbursement Date.

            (c) Third, the remaining balance distributed as follows:

                  (i) To Bangor  Hydro:  (A)  one-third  (1/3) of the  Allocable
            Funds less (B) any amount deposited in the MRC Retention  Subaccount
            by the Trustee under Section 5.03(10)(i) of the Indenture,  and less
            (C) any amount deposited in the Borrower Retention Subaccount by the
            Trustee under Section 5.03(10)(ii) of the Indenture.

                  (ii) To or at the direction of the MRC: (A) one-third (1/3) of
            the  Allocable  Funds  less  (B)  any  amount  deposited  to the MRC
            Prepayment Account by the Trustee under Section 5.03(10)(iii) of the
            Indenture;  provided,  however,  that  if the  Partnership  receives
            written  direction from the MRC not less than five (5) Business Days
            prior to the Indenture  Distribution Date that all or any designated
            portion of such payment  should be transferred by the Trustee to the
            MRC  Prepayment  Account  or the  Special  Redemption  Account,  the
            Partnership  shall  direct the Trustee to effect such  retention  or
            transfer;

                  (iii) To the Partnership: (A) one-third (1/3) of the Allocable
            Funds less (B) any amounts deposited to the Borrower Reserve Account
            by the Trustee under Section 5.03(10)(iv) of the Indenture.

      Examples of the  Partnership's  directions  to the Trustee  regarding  the
      distribution of the Revenue Fund Balance  remaining after Reserve Deposits
      among the parties hereto is attached as Exhibit A.


                                      -5-
   6

      Section  5.  Closing  Date  Adjustments.  The  parties  hereto  agree that
following  the date hereof,  they will  calculate an amount that would have been
distributed  to the parties  hereto,  assuming that the issuance and delivery of
the Bonds (and the  defeasance of the Prior  Bonds),  had occurred at the end of
business  on April 30,  1998,  and the  Partnership  will  distribute  among the
Partnership,  the MRC and Bangor Hydro such amount within 45 days after June 30,
1998 or as soon thereafter as sufficient funds are available.

      Section 6. Distribution of Indenture  Residual.  Under Section 5.15 of the
Indenture, upon the payment and discharge in full of all of the Bonds, and after
application  and other  payments as  described  in clauses  (i) through  (iv) of
Section 5.15 of the Indenture, the Trustee shall pay the balance remaining under
the  Indenture  (the  "Indenture  Residual")  to  or at  the  direction  of  the
Partnership.  The parties  hereto  agree that the  Partnership  shall direct the
Trustee to disburse the Indenture Residual as follows:

            (i) Revenue Fund, one-third paid to the Partnership,  one-third paid
      to Bangor Hydro and one-third paid to the MRC.

            (ii) Debt Service Fund (excluding the Special  Redemption  Account),
      one-third  paid to the  Partnership,  one-third  paid to Bangor  Hydro and
      one-third paid to the MRC.

            (iii) Special Redemption Account, paid to the Partnership.

            (iv) Operating Account in the Operating Fund (after retention by the
      Partnership  of  an  amount  necessary  for  working  capital   purposes),
      one-third  paid to the  Partnership,  one-third  paid to Bangor  Hydro and
      one-third paid to the MRC.

            (v) Operating Reserve Account in the Operating Fund,  one-third paid
      to Bangor Hydro, one-third paid to the MRC and one-third paid to the Issue
      Date Partners.

            (vi)  Capital  Improvement  Fund,  one-third  paid to Bangor  Hydro,
      one-third paid to the MRC and one-third paid to the Issue Date Partners.

            (vii)  Capital  Reserve  Fund,   one-third  paid  to  Bangor  Hydro,
      one-third paid to the MRC and one-third paid to the Issue Date Partners.

            (viii) MRC Reserve Accounts, to the MRC.

            (ix) Borrower Retention Subaccount, to the Issue Date Partners.

            (x) Borrower Reserve Account, to the Funding Date Partners.

Amounts paid to the Issue Date Partners under clauses (v), (vi),  (vii) and (ix)
above shall be paid  71.28574% to PMC and 28.71426% to ENI.  Amounts paid to the
Funding Date Partners under


                                      -6-
   7

clause (x) above,  shall be paid to each Funding Date Partner in  proportion  to
the fraction  the  numerator  of which is the  cumulative  sum of (a) the amount
credited to the Borrower  Reserve  Account on each Indenture  Distribution  Date
multiplied  by (b) that Funding Date  Partner's  aggregate GP Sharing Ratio with
respect to the  general  partners'  aggregate  interest  (currently  10%) and LP
Sharing  Ratio  with  respect  to  the  limited  partners'   aggregate  interest
(currently  90%) as of such date and the  denominator  of which is the aggregate
principal  amount credited to the Borrower  Reserve Account over the life of the
Bonds.

      Section 7. Optional  Redemption,  Purchase or Defeasance of Bonds.  At any
time and from time to time (but not more  frequently  than once in each Calendar
Quarter):

            (a) upon  notice  from the MRC,  the  Partnership  shall  direct the
      Trustee to transfer all or any  designated  portion of money on deposit in
      the MRC Retention  Subaccount or the MRC Prepayment  Account (in a minimum
      increment  of $5,000 or any  multiple  thereof) to the Special  Redemption
      Account of the Debt Service Fund to be used to  optionally  redeem  Series
      1998B  Special Term Bonds (in  authorized  denominations)  on the earliest
      date practicable under Sections 2.04(d) and 5.07(iv) of the Indenture;

            (b) the MRC may (i) purchase  Bonds in the open  market,  and direct
      the Partnership to tender such Bonds to the Trustee for  cancellation,  or
      (ii) direct the  Partnership to defease a designated  portion of the Bonds
      in  authorized  denominations,  or (iii)  from  and  after  July 1,  2008,
      instruct  the  Partnership  to  optionally  redeem  Bonds  (in  authorized
      denominations)  on the earliest  practicable date under Section 2.04(c) of
      the Indenture.  If Bonds are to be defeased, all costs of defeasance shall
      be paid by funds in the MRC Prepayment  Account from such amount and shall
      include all costs and expenses related to such  defeasance,  including the
      purchase  price of Government  Obligations,  the costs and expenses of the
      Trustee, Bond Counsel,  counsel to the Partnership,  and any accounting or
      Rating Agency expenses. If Bonds are to be optionally redeemed pursuant to
      Section  2.04(c) of the  Indenture,  the redemption  price,  including any
      redemption  premium,  shall  be  paid  from  funds  in the  MRC  Retention
      Subaccount or the MRC Prepayment Account.

            (c)  Under  Section  5.03(c)(10)(v)  of the  Indenture,  at any time
      additional  money  may be  paid  to the  Trustee  for  credit  to the  MRC
      Prepayment Account or for transfer to the Special Redemption Account. Upon
      receipt of any such additional  money,  accompanied by a written direction
      from the MRC to do so, the  Partnership  shall  transfer such funds to the
      Trustee  for  credit to the  Account  so  specified  in the MRC's  written
      direction;  provided that amounts to be deposited in or transferred to the
      Special Redemption Account shall be in integral amounts of $5,000.

            (d) If the Partnership  receives a written direction from the MRC to
      direct  the  Trustee  to  transfer  amounts  in either of the MRC  Reserve
      Accounts to the Special Redemption Account or to pay all or a part of such
      amounts to the MRC in accordance  with Section  5.06(c) of the  Indenture,
      the Partnership will so direct the Trustee; provided


                                      -7-
   8

      that the amounts to be so  transferred to the Special  Redemption  Account
      shall be in integral amounts of $5,000.

      Section  8.  Prepayment  Benefit  for Debt  Service  Savings  Due to Early
Retirement  of Bonds from MRC  Prepayment  Account.  If any Series 1998B Special
Term Bonds are optionally redeemed from funds deposited in or transferred to the
Special  Redemption  Account,  or if any  Bonds  are  purchased  by the  MRC and
tendered to the Trustee for cancellation, or defeased, in connection with an MRC
direction given to the Partnership pursuant to Section 7 of this Agreement,  the
Partnership shall calculate the Prepayment  Benefit for each Monthly Period, and
shall provide such  calculations  to the MRC and Bangor Hydro.  Absent  manifest
error, such calculations shall be deemed conclusive.

      Section 9. Notices.  Except when telephonic notice is expressly authorized
by this Agreement,  any notice or other communication to any party in connection
with this  Agreement  shall be in writing and shall be sent by manual  delivery,
overnight   courier  or  United  States  mail  (postage  prepaid)  or  facsimile
transmission  (followed  by a  written  confirmation  sent by  manual  delivery,
overnight courier or United States mail), addressed to such party at the address
specified on the signature  page hereof,  or at such other address as such party
shall have  specified  to the other  parties  hereto in writing.  All periods of
notice  shall  be  measured  from  the  date of  delivery  thereof  if  manually
delivered,  from the date of sending thereof if sent by facsimile  transmission,
from the  first  Business  Day after the date of  sending  if sent by  overnight
courier,  or from  four days  after the date of  mailing  if  mailed;  provided,
however,  that any notice to the  Partnership  from the MRC under  Section  4(b)
hereof shall be deemed to have been given only when received by the Partnership.

      Section 10. Limitation of Liability.  Notwithstanding  any other provision
of this  Agreement,  and without  waiving or  foregoing  any rights  against the
Partnership,  there shall be no recourse  against any general or limited partner
of  the  Partnership  or  any  of  their  respective  affiliates,  stockholders,
partners,  officers,  directors,  employees  or  agents,  for any  liability  or
obligations of the Partnership arising under this Agreement.  The limitations on
recourse  set  forth  in this  Section  10  shall  survive  termination  of this
Agreement  and  the  full  performance  of the  obligations  of the  Partnership
hereunder.

      Section 11. MRC Approval.  The MRC acknowledges  that the distributions to
it pursuant to Section 4 hereof  constitute the  Performance  Credits,  that the
calculation of such distributions might be interpreted as varying method defined
in  Article  XVIII of the  Extended  Waste  Disposal  Agreements,  and that such
variation is  contemplated in paragraph A of Article XVIII of the Extended Waste
Disposal  Agreements.  The MRC hereby  approves of the variation in  calculating
such Performance Credits.

      Section 12. Miscellaneous Provisions.

            (a) Successors and Assigns. This Agreement shall be binding upon and
      inure to the benefit of the parties hereto and their respective successors
      and assigns.


                                      -8-
   9

            (b)  Governing  Law and  Construction;  Severability.  The validity,
      construction and enforceability of this Agreement shall be governed by the
      internal laws of the State of Maine, without giving effect to the conflict
      of laws  principles  thereof.  Whenever  possible,  each provision of this
      Agreement and any other statement,  instrument or transaction contemplated
      hereby or thereby or relating  hereto or thereto shall be  interpreted  in
      such manner as to be effective and valid under such  applicable  law, but,
      if any provision of this Agreement,  the Indenture or any other statement,
      instrument  or  transaction  contemplated  hereby or thereby  or  relating
      hereto or thereto  shall be held to be  prohibited  or invalid  under such
      applicable law, such provision shall be ineffective  only to the extent of
      such prohibition or invalidity, without invalidating the remainder of such
      provision  or the  remaining  provisions  of this  Agreement  or any other
      statement,  instrument or  transaction  contemplated  hereby or thereby or
      relating hereto or thereto.

            (c) Captions.  The captions or headings  herein are for  convenience
      only and in no way define,  limit or  describe  the scope or intent of any
      provision of this Agreement.

            (d)  Entire  Agreement.   This  Agreement  and  the  Power  Purchase
      Agreement,   the  Waste  Disposal  Agreements,   the  Warrants,  the  Bond
      Documents, the partnership agreement of the Partnership and the monitoring
      agreement between the MRC and Bangor Hydro embody the entire agreement and
      understanding  between  the  parties  hereto  with  respect to the subject
      matter hereof and thereof.  This Agreement supersedes all prior agreements
      and  understandings   relating  to  the  subject  matter  hereof.  Nothing
      contained  in  this  Agreement  or in any  other  document,  expressed  or
      implied,  is intended  to confer  upon any Persons  other than the parties
      hereto any rights,  remedies,  obligations  or  liabilities  hereunder  or
      thereunder.

            (e)  Counterparts.  This  Agreement may be executed in any number of
      counterparts,  all of which taken  together  shall  constitute one and the
      same instrument,  and any of the parties hereto may execute this Agreement
      by signing any such counterpart.


                                      -9-
   10

            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be executed as of the date first above written.

Notice Address for Partnership:

One copy to:                         PENOBSCOT ENERGY RECOVERY
                                     COMPANY, LIMITED PARTNERSHIP

c/o KTI, Inc.
7000 Boulevard East                  By PERC Management Company Limited
Guttenberg, NJ  07093                         Partnership, a General Partner
Attn:  President                     By PERC, Inc., its general partner
Fax No.: (201) 854-1771
Telephone No.: (201) 854-777
                                     By: Martin J. Sergi
                                        ----------------------------
                                       
and

                                     Its: President 
                                         ---------------------------

One copy to:

                                    By ENERGY NATIONAL, INC.,
Energy National, Inc.               a General Partner
c/o NRG Energy, Inc.
1221 Nicollet Mall, Suite 700
Minneapolis, MN                     By: Michael Young
Attn: Stan Marks                       -----------------------------
Fax No.: (612) 373-5312             
                                    Its: Secretary
                                        ----------------------------
Telephone No.: (612) 373-5455

and

One copy to:

Penobscot Energy Recovery Company,
Limited Partnership
Industrial Way
Orrington, Maine
Attn:  Gary A. Stacey
Fax No. (207) 825-4115
Telephone No.: (207) 825-4566


                                      -10-
   11

Notice Address for MRC:             MUNICIPAL REVIEW COMMITTEE, INC.

Municipal Review Committee, Inc.
P.O. Box 2579                       By: Gerald Kempen
Bangor, Maine  04402                    ---------------------------
Attn: Clerk                         Its: President
Fax No.: (207) 942-3548                 ---------------------------
Telephone No.: (207) 942-6389

Notice Address for Bangor Hydro:    BANGOR HYDRO-ELECTRIC COMPANY
Bangor Hydro-Electric Company
33 State Street
P.O. Box 932                        By: Frederick S. Samp
Bangor, Maine  04402-0932               -----------------------------
Attn: President                     Its: Vice President-Finance & Law
Fax No.: (207) 945-5621                 -----------------------------
Telephone No.: (207) 941-6653


(Signature Page to Surplus Cash Agreement)