EXECUTION
                                                                COUNTERPART




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                              AMENDMENT NO. 1

                      Dated as of September 21, 1993

                                  to the

                                  UNIT 2

                        FIRST AMENDED AND RESTATED

                     PROJECT LOAN AND CREDIT AGREEMENT

                        Dated as of January 8, 1992

                                   among

                      TEXAS-NEW MEXICO POWER COMPANY

                                    and

                        TEXAS GENERATING COMPANY II

                                    and

                          THE BANKS NAMED HEREIN
                                 as Banks

                                    and

              THE CHASE MANHATTAN BANK (NATIONAL ASSOCIATION)
                                 as Agent


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     AMENDMENT NO. 1 (this "Amendment") dated as of
September 21, 1993 to the UNIT 2 FIRST AMENDED AND RESTATED
PROJECT LOAN AND CREDIT AGREEMENT dated as of January 8, 1992
(the "Credit Agreement"), among TEXAS-NEW MEXICO POWER COMPANY
("TNP"), TEXAS GENERATING COMPANY II ("TGC II"), each of the
lenders that is a signatory hereto identified under the caption
"BANKS" on the signature pages hereto or which, pursuant to
Section 4.05(g) or 16.01 hereof, shall become a "Bank" hereunder,
the Voting Participants and THE CHASE MANHATTAN BANK (NATIONAL
ASSOCIATION), as agent for the Banks (in such capacity, the
"Agent").


                                 RECITALS


     1.   The parties hereto have previously entered into the
Credit Agreement which became effective on the Effective Date,
January 24, 1992, upon the satisfaction of the conditions
precedent thereto as set out in Section 8.01 of the Credit
Agreement.

     2.   On January 27, 1992, TNP and TGC II satisfied the
conditions in Section 8.02 of the Credit Agreement to cause the
occurrence of the Extension Date.  Among other things, TNP issued
its Series T Bonds and its First Secured Debentures, due January
15, 1999, and applied the net proceeds thereof to, among other
things, purchase pro rata from the Banks $65,000,000 of the
Existing Loans outstanding under the Credit Agreement.  The
Existing Loans acquired by TNP were, automatically upon their
purchase by TNP, converted into the First Replacement Loan,
evidenced by the First Replacement Note that is secured pursuant
to the Security Documents pari passu with the other Obligations
under the Credit Agreement and the other Project Documents.  The
First Secured Debentures are secured by TNP's pledge of the First
Replacement Note to the First Debenture Trustee under the First
Secured Debenture Indenture.  As a result of the pledge of the
First Replacement Note, the First Secured Debentures indirectly
share pari passu in the Banks' Collateral.

     3.   TNP and TGC II have the right to secure additional debt
securities with the Collateral, subject to the terms and
conditions of Section 9.33 of the Credit Agreement.  Other than
with respect to the January 27, 1992 transactions described in
Recital 2 hereof, however, no specific procedures were

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 1> 

established in the Credit Agreement for TNP or TGC II to
secure additional debt securities with the Collateral.

     4.   The parties desire to amend the Credit Agreement as
provided for in this Amendment to facilitate TNP's or TGC II's
securing certain additional debt securities and, upon the
payment, prepayment or purchase in full of the Project Loans
outstanding on the First Amendment Effective Date, all interest
due and payable thereon and all other amounts due and payable by
TNP and TGC II to the Banks under the Credit Agreement
(including, without limitation, all Supplemental Advances) and
the other Project Documents, debt with the Collateral from time
to time in furtherance of and as necessary for the parties to
achieve the purposes and objectives, to perform the obligations
and to exercise the rights, all as set forth in or contemplated
by the Credit Agreement and as modified by this Amendment.

     5.   On July 2, 1993, TNP requested certain amendments to
the Credit Agreement to provide, among other things, for the
extension of certain scheduled repayment dates and the prepayment
by TGC II of $75,750,000 of Existing Project Loans.  On July 2,
1993, TNP requested certain amendments to the Unit 1 First
Amended and Restated Project Loan and Credit Agreement dated as
of January 8, 1992 among TNP, TGC, the banks and the other
parties thereto and Chase, as Agent (as amended, modified and
supplemented and in effect from time to time, the "Unit 1 Credit
Agreement") and simultaneously with the entering into of this
Amendment the parties to the Unit 1 Credit Agreement are entering
into Amendment No. 1 to the Unit 1 Credit Agreement in order to
effect such amendments to the Unit 1 Credit Agreement.

     6.   The funds necessary for the payments and prepayments of
Existing Project Loans are expected to be provided by the
issuance by TNP of new first mortgage bonds (the "New Bonds") in
an aggregate principal amount of up to $100,000,000 under the TNP
Bond Indenture and available cash.

     7.   Certain provisions of this Amendment will become
effective only upon the prepayment of a portion of the Existing
Project Loans and the prepayment and purchase of certain of the
indebtedness under the Unit 1 Credit Agreement and the
satisfaction of certain other conditions.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 2>

     8.   By virtue of the First Debenture Trustee Consent, the
Replacement Note Holder has consented to the extent required to
the provisions of this Amendment.

     NOW, THEREFORE, for and in consideration of the premises and
other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto
agree as follows:

     SECTION 1.     Definitions.

          Unless otherwise defined herein, the capitalized terms
utilized herein (including the Recitals hereinabove set forth)
which are defined in the Credit Agreement shall have the meanings
ascribed to them in the Credit Agreement.  The capitalized terms
defined herein, in the context of amending the Credit Agreement,
shall, when used herein (including the Recitals hereinabove set
forth), have the meanings ascribed to them in such amending
language.


     SECTION 2.     Conditions Precedent.

     (a)  The effectiveness of this Amendment shall be subject to
          the condition precedent that, on or before September
          30, 1993, this Amendment shall have been executed and
          delivered by TNP, TGC II, the Banks, the Voting
          Participants (if any), the Agent and the Collateral
          Agent, and to the satisfaction of the following
          additional conditions precedent, in each case for the
          benefit of the parties hereto and the other Secured
          Parties:

          (i)    TNP and TGC II each shall deliver to the Agent
                 certified copies of the resolutions of their
                 respective boards of directors authorizing the
                 execution, delivery and performance of this
                 Amendment and each of the other First Amendment
                 Documents to which such Person is or is intended
                 to be a party and the transactions contemplated
                 by the issuance by TNP of New Bonds in an
                 aggregate principal amount of up to $100,000,000
                 under the TNP Bond Indenture and all other
                 documents evidencing other necessary action with
                 respect thereto;

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 3>

         (ii)    TNP and TGC II each shall deliver to the Agent a
                 certificate, in form and substance satisfactory
                 to the Agent, signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that,
                 except as disclosed in such certificate, there
                 shall be no injunction, writ, preliminary
                 restraining order or any order of any nature
                 issued by any arbitrator, court or other
                 governmental authority directing that this
                 Amendment not be consummated as herein provided
                 and certifying further that, except as disclosed
                 in such certificate, there shall be no material
                 litigation, investigation or proceeding of or
                 before any arbitrator, court or other
                 governmental authority pending or (to the best
                 of such Authorized Officer's knowledge,
                 threatened) against TNP or TGC II or affecting
                 in any material respect any of its respective
                 properties, revenues or assets;

        (iii)    TNP and TGC II each shall deliver to the Agent a
                 certificate signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that
                 (A) the representations and warranties of each
                 of TNP and TGC II, as applicable, contained in
                 Section 2 of the Credit Agreement, as amended by
                 this Amendment, and in each of the other Project
                 Documents to which such Person is a party shall
                 be true and correct on and as of such date as if
                 made on and as of such date (or, if stated to
                 have been made solely as of an earlier date,
                 were true and correct as of such earlier date),
                 (B) no Default under the Credit Agreement, as
                 amended by this Amendment, and no default by
                 either TNP or TGC II under any of the other
                 Project Documents to which either TNP or TGC II
                 is a party, has occurred and is continuing on
                 such date and (C) to the best of such Authorized
                 Officer's knowledge, no default by any other
                 Person to any other Project Document has
                 occurred and is continuing on such date;

         (iv)    TNP and TGC II each shall deliver to the Agent a
                 certificate signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 4> 

(A) it has obtained all Government Approvals necessary
under applicable laws and regulations in connection with the due
execution, delivery and performance of this Amendment and
transactions contemplated hereby (except Section 3 hereof) and
(B) all such Government Approvals have been duly obtained, were
validly issued and are held by and in the name of TNP or TGC II,
as applicable, and are final, in full force and effect and not
subject to appeal;

          (v)    TNP and TGC II each shall deliver to the Agent
                 legal opinions from counsel to TNP and TGC II in
                 form and substance satisfactory to the Agent;

         (vi)    the Intercreditor Amendment No. 2 shall have
                 been duly executed and delivered by the intended
                 parties thereto;

        (vii)    the First Debenture Trustee Consent shall have
                 been duly executed by the First Indenture
                 Trustee and delivered to the Agent;

       (viii)    the Fourth TGC II Modification and Extension
                 Agreement shall have been duly executed and
                 delivered by the intended parties thereto and,
                 at the sole cost of TNP and TGC II, the Title
                 Company shall have issued to the Agent (A) a
                 T-38 endorsement to Stewart Title Guaranty
                 Mortgage Policy No. M-5802-561740 and a T-38
                 endorsement to Stewart Title Guaranty Mortgage
                 Policy No. M-5832-25812, each with respect to
                 such Fourth TGC II Mortgage Modification and
                 Extension Agreement and (B) a title information
                 report in form and substance satisfactory to and
                 approved by the Agent, showing good and
                 indefeasible title to the TGC II Mortgage Trust
                 Estate is vested in TGC II and that the TGC II
                 Mortgage constitutes a valid first mortgage lien
                 on the TGC II Mortgage Trust Estate and showing
                 that there are no intervening liens which would
                 adversely affect the priority of the liens
                 securing the Loans, subject only to Permitted
                 Liens;

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 5>

         (ix)    the TNP Second Lien Mortgage Modification No. 2
                 shall have been duly executed and delivered by
                 the intended parties thereto;

          (x)    the Facility Purchase Agreement Amendment No. 1,
                 in form and substance satisfactory to the Agent,
                 shall have been duly executed and delivered by
                 the intended parties thereto;

         (xi)    evidence that the First Amendment Documents and
                 all other instruments to be recorded or filed in
                 connection with the effectiveness of this
                 Amendment have been duly recorded and filed in
                 all places wherein such recording and filing are
                 necessary to perfect the interests of the Agent
                 in and to the Collateral covered thereby;

        (xii)    TNP and TGC II shall each deliver to the Agent
                 such other certificates, documents or other
                 information with respect to the matters
                 contemplated by this Amendment as the Agent may
                 reasonably determine are necessary to effect the
                 transactions contemplated by this Amendment; and

       (xiii)    Amendment No. 1 to the Unit 1 Credit Agreement
                 shall have been duly executed and delivered by
                 TNP, TGC, the Banks (under and as defined in the
                 Unit 1 Credit Agreement), the Agent (under and
                 as defined in the Unit 1 Credit Agreement) and
                 the Collateral Agent (under and as defined in
                 the Intercreditor Agreement) and each of the
                 conditions precedent described in Sections
                 2(a)(i) through (xi) of Amendment No. 1 to the
                 Unit 1 Credit Agreement shall have been
                 satisfied.

     (b)     The effectiveness of Section 3 of this Amendment
             shall be subject to the further conditions precedent
             that, on or before June 30, 1994, each of the
             following additional conditions precedent, in each
             case for the benefit of the parties hereto and the
             other Secured Parties, shall have been fulfilled:

          (i)    TNP and TGC each shall have effected a Section
                 4.05 Closing, under and as defined in the Unit 1

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 6> 

               Credit Agreement, as amended by Amendment No. 1 thereto,
               with respect to Second Secured Debentures, as defined in, and
               issued in accordance with the terms and conditions of Section
               4.05 of, the Unit 1 Credit Agreement, as amended by    
               Amendment No. 1 thereto (the "Second Secured Debentures"),
               in an aggregate principal amount of $140,000,000 and TNP
               shall have contemporaneously issued New Bonds in an    
               aggregate principal amount of up to $100,000,000 and (A) TNP
               shall have applied the proceeds from the Second Secured
               Debentures to purchase "Project Notes," under and as defined
               in the Unit 1 Credit Agreement, as amended by Amendment No.
               1 thereto, in the amount of $140,000,000 and (B) TNP and
               TGC II shall have applied a portion of the proceeds of the New
               Bonds and available cash to prepay the Existing Project Loans in
               the amount of $75,750,000 and TNP or TGC shall have prepaid
               the "Project Loans," under and as defined in the Unit 1 Credit
               Agreement, as amended by Amendment No. 1 thereto, in the
               amount of $6,000,000;

         (ii)    TNP and TGC II each shall deliver to the Agent a
                 certificate signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that
                 (A) the representations and warranties of each
                 of TNP and TGC II, as applicable, contained in
                 Section 2 of the Credit Agreement, as amended by
                 this Amendment, and in each of the other Project
                 Documents to which such Person is a party shall
                 be true and correct on and as of such date as if
                 made on and as of such date (or, if stated to
                 have been made solely as of an earlier date,
                 were true and correct as of such earlier date),
                 (B) no Default under the Credit Agreement, as
                 amended by this Amendment, and no default by
                 either TNP or TGC II under any of the other
                 Project Documents to which either TNP or TGC II
                 is a party, has occurred and is continuing on
                 such date and (C) to the best of such Authorized
                 Officer's knowledge, no default by any other
                 Person to any other Project Document has
                 occurred and is continuing on such date;

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 7>

        (iii)    TNP and TGC II each shall deliver to the Agent a
                 certificate signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that
                 (A) it has obtained all Government Approvals
                 necessary under applicable laws and regulations
                 in connection with the provisions of, and the
                 transactions contemplated by, Section 3 hereof
                 (and the transactions contemplated by Section 4
                 hereof that are contemplated to occur as a
                 consequence of the occurrence of the Section 3
                 Effective Date) and (B) all such Government
                 Approvals have been duly obtained, were validly
                 issued and are held by and in the name of the
                 proper party (either directly or by transfer
                 from the original applicant therefor) and are
                 final, in full force and effect and not subject
                 to appeal;

         (iv)    TNP and TGC II each shall deliver to the Agent a
                 certificate, in form and substance satisfactory
                 to the Agent, signed by an Authorized Officer of
                 TNP or TGC II, as applicable, certifying that,
                 except as disclosed in such certificate, there
                 shall be no injunction, writ, preliminary
                 restraining order or any order of any nature
                 issued by any arbitrator, court or other
                 governmental authority directing that this
                 Amendment not be consummated as herein provided
                 and certifying further that, except as disclosed
                 in such certificate, there shall be no material
                 litigation, investigation or proceeding of or
                 before any arbitrator, court or other
                 governmental authority pending or (to the best
                 of such Authorized Officer's knowledge,
                 threatened) against TNP or TGC II or affecting
                 in any material respect any of its respective
                 properties, revenues or assets;

          (v)    TNP and TGC II each shall deliver to the Agent
                 legal opinions of counsel to TNP and TGC II
                 (which may take the form of bring-down letters
                 with respect to legal opinions delivered on the
                 First Amendment Effective Date) in form and
                 substance satisfactory to the Agent;

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 8>

         (vi)    the Fifth TGC II Modification and Extension
                 Agreement shall have been duly executed and
                 delivered by the intended parties thereto and,
                 at the sole cost of TNP and TGC II, the Title
                 Company shall have issued to the Agent (A) a
                 T-38 endorsement to the Stewart Title Guaranty
                 Mortgage Policy issued pursuant to Section 17.22
                 of the Credit Agreement, as amended by this
                 Amendment, and a T-38 endorsement to Stewart
                 Title Guaranty Mortgage Policy No. M-5832-25812,
                 each with respect to such Fifth TGC II Mortgage
                 Modification and Extension Agreement and (B) a
                 title information report in form and substance
                 satisfactory to and approved by the Agent,
                 showing good and indefeasible title to the TGC
                 II Mortgage Trust Estate is vested in TGC II and
                 that the TGC II Mortgage constitutes a valid
                 first mortgage lien on the TGC II Mortgage Trust
                 Estate and showing that there are no intervening
                 liens which would adversely affect the priority
                 of the liens securing the Loans, subject only to
                 Permitted Liens;

        (vii)    evidence that the First Amendment Documents and
                 all other instruments to be recorded or filed in
                 connection with the effectiveness of Section 3
                 of this Amendment have been duly recorded and
                 filed in all places wherein such recording and
                 filing are necessary to perfect the interests of
                 the Agent in and to the Collateral covered
                 thereby; and

       (viii)    TNP and TGC II shall each deliver to the Agent
                 such other certificates, documents or other
                 information with respect to the matters
                 contemplated by Section 3 of this Amendment as
                 the Agent may reasonably determine are necessary
                 to effect the transactions contemplated by
                 Section 3 of this Amendment.

     (c)  Promptly upon the satisfaction of the conditions
          precedent to the effectiveness of this Amendment, as
          described in Section 2(a) of this Amendment, the Agent
          shall confirm in writing delivered to TNP and TGC II
          that the provisions of this Amendment (except Section 3

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 9> 

     hereof) have become effective.  Promptly upon the
     satisfaction of the conditions precedent described in Section
     2(b) of this Amendment (i) TNP or TGC II shall pay to the Agent
     for the ratable benefit of the Banks a non-refundable extension
     fee in the amount of 1/4 of 1% of the aggregate principal amount
     of Existing Project Loans outstanding on the Bond Proceeds
     Payment Date after giving effect to the prepayments on such date
     and (ii) the Agent shall confirm in writing delivered to TNP and
     TGC II that the provisions of Section 3 of this Amendment have
     become effective.


     SECTION 3.     Extension of Maturities and Changes to
                    "Applicable Margins".

     SECTION 3.01.  Extension of Maturities; Changes to
                    "Applicable Margins".         

     (a)  Section 1.01 of the Credit Agreement shall be amended
          as follows:

          (i)  Delete the following terms and their definitions
               in their entirety:  "Final Maturity Date", "First
               Scheduled Reduction Date", "Scheduled Reduction
               Dates" and "Second Scheduled Reduction Date";

         (ii)  Insert the following new terms and their
               definitions in the appropriate alphabetical order:

                    ""Final Maturity Date" shall mean December
               31, 1998.

                    "First Prospect Purchase Carryforward Amount"
               shall mean the excess (if any) of (a) Period 1
               Prospect Purchases over (b) $1,567,992.42. 

                    "First Scheduled Reduction Date" shall mean
               December 31, 1995.

                     "First Supplemental Advance Bank Purchase
               Carryforward Amount" shall mean the excess (if
               any) of (a) Period 1 Supplemental Advance Bank
               Purchases over (b) the excess (if any) of (i)

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 10> 

          $35,369,507.58 over (ii) Period 1 Section 5.02(a)
          Prepayments.

                    "Period 1 Prospect Purchases" shall have the
               meaning ascribed to such term in Section
               5.02(b)(i)(A)(2)(y)(II) hereof.

                    "Period 1 Section 5.02(a) Prepayments" shall
               have the meaning ascribed to such term in Section
               5.02(b)(i)(A)(1)(y)(I) hereof.

                    "Period 1 Supplemental Advance Bank
               Purchases" shall have the meaning ascribed to such
               term in Section 5.02(b)(i)(A)(1)(y)(II) hereof.

                    "Period 2 Prospect Purchases" shall have the
               meaning ascribed to such term in Section
               5.02(b)(i)(B)(2)(y)(I)(bb) hereof.

                    "Period 2 Section 5.02(a) Prepayments" shall
               have the meaning ascribed to such term in Section
               5.02(b)(i)(B)(1)(y)(I)(aa) hereof.
          
                    "Period 2 Supplemental Advance Bank
               Purchases" shall have the meaning ascribed to such
               term in Section 5.02(b)(i)(B)(1)(y)(I)(bb) hereof.

                    "Period 3 Section 5.02(a) Prepayments" shall
               have the meaning ascribed to such term in Section
               5.02(b)(i)(C)(1)(y)(I)(aa) hereof.
          
                    "Period 3 Supplemental Advance Bank
               Purchases" shall have the meaning ascribed to such
               term in Section 5.02(b)(i)(C)(1)(y)(I)(bb) hereof.

                    "Scheduled Reduction Dates" shall mean the
               First Scheduled Reduction Date, the Second
               Scheduled Reduction Date, the Third Scheduled
               Reduction Date, the Final Maturity Date and each
               Replacement Note Maturity Date.

                    "Second Prospect Purchase Carryforward
               Amount" shall mean the excess (if any) of (a) the
               sum of (i) the First Prospect Purchase

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 11> 

          Carryforward Amount plus (ii) Period 2 Prospect
          Purchases over (b) $1,567,992.42. 

                    "Second Scheduled Reduction Date" shall mean
               December 31, 1996.

                    "Second Supplemental Advance Bank Purchase
               Carryforward Amount" shall mean the excess (if
               any) of (a) the sum of (i) the First Supplemental
               Advance Bank Purchase Carryforward Amount plus
               (ii) Period 2 Supplemental Advance Bank Purchases
               over (b) the excess (if any) of (i) $35,369,507.58
               over (ii) Period 2 Section 5.02(a) Prepayments. 

                    "Third Scheduled Reduction Date" shall mean
               December 31, 1997."; and

        (iii)  Delete the term "Applicable Margin" and the
               definition thereof and substitute in its place the
               following:

                    ""Applicable Margins" shall mean:

               (i)  with respect to Prime Rate Loans,

                    (a)  for the period from September 23, 1991
                         through and including December 31, 1992,
                         1-1/8%,

                    (b)  for the period from but excluding
                         December 31, 1992 through and including
                         December 31, 1993, 1-3/8%,

                    (c)  for the period from but excluding
                         December 31, 1993 through and including
                         December 31, 1994, 1-7/8%,

                    (d)  for the period from but excluding
                         December 31, 1994 through and including
                         December 31, 1995, 2-3/8%,

                    (e)  for the period from but excluding
                         December 31, 1995 through and including
                         December 31, 1996, 2-5/8%,

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 12>

                    (f)  for the period from but excluding
                         December 31, 1996 through and including
                         December 31, 1997, 2-7/8%, and

                    (g)  thereafter, 3-1/8%;

              (ii)  with respect to CD Rate Loans,

                    (a)  for the period from September 23, 1991
                         through and including December 31, 1992,
                         1-5/8%,

                    (b)  for the period from but excluding
                         December 31, 1992 through and including
                         December 31, 1993, 1-7/8%,

                    (c)  for the period from but excluding
                         December 31, 1993 through and including
                         December 31, 1994, 2-3/8%,

                    (d)  for the period from but excluding
                         December 31, 1994 through and including
                         December 31, 1995, 2-7/8%,

                    (e)  for the period from but excluding
                         December 31, 1995 through and including
                         December 31, 1996, 3-1/8%,

                    (f)  for the period from but excluding
                         December 31, 1996 through and including
                         December 31, 1997, 3-3/8%, and

                    (g)  thereafter, 3-5/8%; and

             (iii)  with respect to Eurodollar Rate Loans,

                    (a)  for the period from September 23, 1991
                         through and including December 31, 1992,
                         1-1/2%,

                    (b)  for the period from but excluding
                         December 31, 1992 through and including
                         December 31, 1993, 1-3/4%,

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 13>

                    (c)  for the period from but excluding
                         December 31, 1993 through and including
                         December 31, 1994, 2-1/4%,

                    (d)  for the period from but excluding
                         December 31, 1994 through and including
                         December 31, 1995, 2-3/4%,

                    (e)  for the period from but excluding
                         December 31, 1995 through and including
                         December 31, 1996, 3%,

                    (f)  for the period from but excluding
                         December 31, 1996 through and including
                         December 31, 1997, 3-1/4%, and

                    (g)  thereafter, 3-1/2%.".
                    
     (b)  Section 5.02(b)(iii) of the Credit Agreement shall be
          deleted in its entirety and replaced with the
          following:

               "(iii)  [INTENTIONALLY OMITTED].".


     (c)  Section 5.02(b)(i) of the Credit Agreement shall be
          deleted in its entirety and replaced with the
          following:

               "(i) TGC II shall prepay, or TNP shall purchase in
          accordance with the terms and conditions of Section
          4.05 hereof, the Project Loans and in the case of
          clause (E), the applicable Replacement Loans, in the
          following amounts:

          (A)  On the First Scheduled Reduction Date (1) the
               Existing Project Loans held by the Supplemental
               Advance Banks shall be repaid pro rata to the
               Supplemental Advance Banks in an aggregate
               principal amount equal to the excess (if any) of
               (x) $35,369,507.58 over (y) the sum of, in each
               case for the period after the Bond Proceeds
               Payment Date and before the First Scheduled
               Reduction Date (I) the aggregate principal amount
               of Existing Project Loans prepaid pursuant to

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 14> 

          Section 5.02(a) hereof ("Period 1 Section 5.02(a)
          Prepayments") plus (II) the aggregate principal amount of
          Existing Project Loans purchased at Section 4.05 Closings, on TNP
          Purchase Dates or on the Designee Purchase Date ("Period 1
          Supplemental Advance Bank Purchases") and (2) the Existing
          Project Loans held by Prospect shall be repaid in an aggregate
          principal amount equal to the excess (if any) of (x)
          $1,567,992.42 over (y) the sum of, in each case from the period
          after the Bond Proceeds Payment Date and before the First
          Scheduled Reduction Date (I) the aggregate principal amount of
          proceeds received by Prospect in respect of the aggregate
          principal amount of Existing Project Loans prepaid pursuant to
          the provisions of this Agreement (except for prepayments made
          pursuant to Section 5.02(a) hereof) plus (II) the aggregate
          principal amount of proceeds received by Prospect in respect of
          the aggregate principal amount of Existing Project Loans
          purchased at Section 4.05 Closings, on TNP Purchase Dates or on
          the Designee Purchase Date ("Period 1 Prospect Purchases");

          (B)  On the Second Scheduled Reduction Date (1) the
               Existing Project Loans held by the Supplemental
               Advance Banks shall be repaid pro rata to the
               Supplemental Advance Banks in an aggregate
               principal amount equal to the excess (if any) of
               (x) $35,369,507.58 over (y) the sum of (I) in each
               case for the period after the First Scheduled
               Reduction Date and before the Second Scheduled
               Reduction Date (aa) the aggregate principal amount
               of Existing Project Loans prepaid pursuant to
               Section 5.02(a) hereof ("Period 2 Section 5.02(a)
               Prepayments") plus (bb) the aggregate principal
               amount of Existing Project Loans purchased at
               Section 4.05 Closings, on TNP Purchase Dates or on
               the Designee Purchase Date ("Period 2 Supplemental
               Advance Bank Purchases") plus (II) the First
               Supplemental Advance Bank Purchase Carryforward
               Amount and (2) the Existing Project Loans held by
               Prospect shall be repaid in an aggregate principal
               amount equal to the excess (if any) of (x)
               $1,567,992.42 over (y) the sum of (I) in each case

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 15> 

          from the period after the First Scheduled Reduction
          Date and before the Second Scheduled Reduction Date (aa) the
          aggregate principal amount of proceeds received by Prospect in
          respect of the aggregate principal amount of Existing Project
          Loans prepaid pursuant to the provisions of this Agreement
          (except for prepayments made pursuant to Section 5.02(a) hereof)
          plus (bb) the aggregate principal amount of proceeds received by
          Prospect in respect of the aggregate principal amount of Existing
          Project Loans purchased at Section 4.05 Closings, on TNP Purchase
          Dates or on the Designee Purchase Date ("Period 2 Prospect
          Purchases") plus (II) the First Prospect Purchase Carryforward
          Amount;

          (C)  On the Third Scheduled Reduction Date (1) the
               Existing Project Loans held by the Supplemental
               Advance Banks shall be repaid pro rata to the
               Supplemental Advance Banks in an aggregate
               principal amount equal to the excess (if any) of
               (x) $35,369,507.58 over (y) the sum of (I) in each
               case for the period after the Second Scheduled
               Reduction Date and before the Third Scheduled
               Reduction Date (aa) the aggregate principal amount
               of Existing Project Loans prepaid pursuant to
               Section 5.02(a) hereof ("Period 3 Section 5.02(a)
               Prepayments") plus (bb) the aggregate principal
               amount of Existing Project Loans purchased at
               Section 4.05 Closings, on TNP Purchase Dates or on
               the Designee Purchase Date ("Period 3 Supplemental
               Advance Bank Purchases") plus (II) the Second
               Supplemental Advance Bank Purchase Carryforward
               Amount and (2) the Existing Project Loans held by
               Prospect shall be repaid in an aggregate principal
               amount equal to the excess (if any) of (x)
               $1,567,992.42 over (y) the sum of (I) in each case
               from the period after the Second Scheduled
               Reduction Date and before the Third Scheduled
               Reduction Date (aa) the aggregate principal amount
               of proceeds received by Prospect in respect of the
               aggregate principal amount of Existing Project
               Loans prepaid pursuant to the provisions of this
               Agreement (except for prepayments made pursuant to
               Section 5.02(a) hereof) plus (bb) the aggregate

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 16> 

          principal amount of proceeds received by Prospect in
          respect of the aggregate principal amount of Existing Project
          Loans purchased at Section 4.05 Closings, on TNP Purchase Dates
          or on the Designee Purchase Date plus (II) the Second Prospect
          Purchase Carryforward Amount;

          (D)  on the Final Maturity Date, the Existing Project
               Loans shall be repaid in an aggregate principal
               amount equal to 100% of the outstanding Existing
               Project Loans; and

          (E)  on each Replacement Note Maturity Date and subject
               to Section 4.05(i) hereof, the aggregate principal
               amount of Replacement Loans maturing on such
               date;".

     SECTION 3.02.  Joinder of Guarantor.

          TNP, as the Guarantor, hereby confirms and consents to
each and every of the terms and conditions of Section 3 of this
Amendment and the Credit Agreement as amended by Section 3 of
this Amendment (including, without limitation Section 17.13 of
the Credit Agreement), and agrees that the terms and conditions
of the Guaranty are in full force and effect and unaffected by
the effectiveness of Section 3 of this Amendment and acknowledges
that there are no claims or offsets against, or defenses or
counterclaims to, the Guaranty.


     SECTION 4.     Conforming Changes to the Credit Agreement.

     SECTION 4.01.  Future Issuances of Secured Debentures.

     (a)  The introductory paragraph of the Credit Agreement
          shall be amended by adding an "s" to the end of the
          term "Replacement Note Holder" in both occurrences of
          such term.

     (b)  Recital 7 of the Credit Agreement shall be amended by
          inserting the word "First" before each occurrence of
          the following terms:  "Secured Debentures", "Secured
          Debenture Indenture", "Replacement Loans", "Replacement
          Note" and "Debenture Trustee".

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 17>

     (c)  Recital 8 of the Credit Agreement shall be amended by
          inserting the word "First" before the term "Secured
          Debentures".

     (d)  Section 1.01 of the Credit Agreement shall be further
          amended as follows:

          (i)  Delete the following terms and their definitions
               in their entirety:  "Banks", "Debenture Trustee",
               "Project Loans", "Project Notes", "Replacement
               Loan", "Replacement Note", "Replacement Note
               Holder", "Replacement Note Maturity Date",
               "Secured Debenture Indenture", "Secured
               Debentures", "Security Documents" and "TGC II
               Mortgage Modifications";

         (ii)  Insert the following new terms and their
               definitions in the appropriate alphabetical order:

                    ""4.05 Notice" shall have the meaning
               ascribed to such term in Section 4.05(c) hereof.

                    "Aggregate Commitment" shall mean, for each
               Bank, the amount set forth opposite the name of
               such Bank on the signature pages of the First
               Amendment under the caption "Aggregate
               Commitment".

                    "Bond Proceeds Payment Date" shall mean the
               date on which (a) TNP or TGC II prepays the
               Existing Loans in an aggregate principal amount of
               $75,750,000, (b) TNP purchases $140,000,000 of
               "Project Loans," under and as defined in the Unit
               1 Credit Agreement, as amended by Amendment No. 1
               thereto and (c) TNP or TGC prepays $6,000,000 of
               "Project Loans," under and as defined in the Unit
               1 Credit Agreement, as amended by Amendment No. 1
               thereto.

                    "Banks" shall mean the Existing Project Banks
               and the Supplemental Advance Banks.

                    "Class" shall mean, with respect to each
               Loan, whether such Loan is an Existing Project

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 18> 

          Loan, a Supplemental Advance or a Replacement Loan,
          each of which constitutes a Class.

                    "Collateral Coverage Maximum Amount" shall
               mean, as of any date of determination on or after
               the First Amendment Effective Date, (a)
               $288,500,000 minus (b) the amount of payments made
               by TNP resulting in transfers made by TGC II (on
               or after the First Amendment Effective Date)
               which, in accordance with the terms and conditions
               of the Facility Purchase Agreement, have resulted
               in transfers of Interests (as defined in the
               Facility Purchase Agreement) in Unit 2 from TGC II
               to TNP which Interests (as so defined) have been
               released from the lien of the TGC II Mortgage.  On
               the Bond Proceeds Payment Date (after giving
               effect to the transactions contemplated to occur
               on or prior to the Bond Proceeds Payment Date),
               the Collateral Coverage Maximum Amount shall be
               $212,750,000 subject to reduction thereafter by
               virtue of transactions described in clause (b) of
               the preceding sentence occurring after the Bond
               Proceeds Payment Date.

                    "Debenture Trustees" shall mean the First
               Debenture Trustee and any Subsequent Debenture
               Trustee, and "Debenture Trustee" shall mean any of
               them.

                    "Designee"  shall have the meaning ascribed
               to such term in Section 4.05(g) hereof.

                    "Designee Purchase Date" shall have the
               meaning ascribed to such term in Section 4.05(g)
               hereof.

                    "Designee Purchase Notice" shall have the
               meaning ascribed to such term in Section 4.05(g)
               hereof.

                    "Existing Banks" shall have the meaning
               ascribed to such term in Section 4.01(a) hereof.

                    "Existing Loans" shall have the meaning
               ascribed to such term in Section 4.01(a) hereof.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 19>

                    "Existing Notes" shall have the meaning
               ascribed to such term in Section 4.01(a) hereof.

                    "Existing Project Banks" shall mean the
               Existing Banks and the New Advance Banks.

                    "Existing Project Loans" shall mean the
               Existing Loans and the New Advances.

                    "Facility Purchase Agreement Amendment No. 1"
               shall mean Amendment No. 1 dated as of September
               21, 1993 to the Unit 2 First Amended and Restated
               Facility Purchase Agreement among TNP, TGC II, the
               Agent and the Collateral Agent entered into to
               correct an inaccurate numerical reference therein.

                    "Fifth TGC II Modification and Extension
               Agreement" shall mean the Fifth TGC II
               Modification and Extension Agreement among the
               Agent, the Collateral Agent, TNP and TGC II,
               substantially in the form of Exhibit E to the
               First Amendment.

                    "First Amendment" shall mean the Amendment
               No. 1 dated as of September 21, 1993 to this
               Agreement among TNP, TGC II, the Banks, the Voting
               Participants and the Agent.

                    "First Amendment Documents" shall mean the
               First Amendment, the Intercreditor Amendment No.
               2, the First Debenture Trustee Consent and the
               First Amendment Security Documents.

                    "First Amendment Effective Date" shall mean
               the date on which all of the conditions set forth
               in Section 2(a) of the First Amendment shall have
               been satisfied.

                    "First Amendment Security Documents" shall
               mean the First Amendment TGC II Mortgage
               Modifications, the TNP Second Lien Mortgage
               Modification No. 2 and the Facility Purchase
               Agreement Amendment No. 1.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 20>

                    "First Amendment TGC II Mortgage
               Modifications" shall mean the Fourth TGC II
               Mortgage Modification and Extension Agreement and
               the Fifth TGC II Mortgage Modification and
               Extension Agreement.

                    "First Debenture Trustee" shall mean IBJ, as
               trustee under, or any successor trustee under, the
               First Secured Debenture Indenture.

                    "First Debenture Trustee Consent" shall mean
               a First Debenture Trustee Consent duly executed
               and delivered by the First Debenture Trustee,
               substantially in the form of Exhibit J to the
               First Amendment.

                    "First Replacement Loan" shall have the
               meaning ascribed to such term in Section 4.05(a)
               hereof.

                    "First Replacement Note" shall have the
               meaning ascribed to such term in Section 4.05(a)
               hereof.

                    "First Replacement Note Maturity Date" shall
               mean, subject to Section 4.05(i) hereof, the
               stated maturity date of the First Secured
               Debentures.

                    "First Secured Debenture Indenture" shall
               mean the Indenture and Security Agreement dated as
               of January 15, 1992 between TNP and IBJ, as
               trustee, as the same may from time to time be
               amended, modified or supplemented or its
               provisions waived.

                    "First Secured Debentures" shall mean the
               debentures, due January 15, 1999, issued by TNP on
               January 27, 1992 under the First Secured Debenture
               Indenture.

                    "Fourth TGC II Modification and Extension
               Agreement" shall mean the Fourth TGC II
               Modification and Extension Agreement among the
               Agent, the Collateral Agent, TNP and TGC II,

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 21> 

          substantially in the form of Exhibit D to the First
          Amendment.

                    "IBJ" shall mean IBJ Schroder Bank & Trust
               Company, a New York banking corporation.

                    "Intercreditor Amendment No. 2" shall mean
               Amendment No. 2 to the Intercreditor Agreement
               dated as of September 21, 1993 among TNP, TGC,
               TGC II, the banks and the other parties party
               thereto and Chase in its several capacities as the
               Agent, the Collateral Agent and the Agent under
               the Unit 1 Credit Agreement, substantially in the
               form of Exhibit C to the First Amendment.

                    "New Advance Banks" shall mean Chase and
               NationsBank of Texas, N.A ("NationsBank").

                    "New Advance Closing Date" shall mean the
               Bond Proceeds Payment Date.

                    "New Advance Commitment" shall mean (a) for
               Chase, the obligation of Chase to make New
               Advances in an aggregate amount up to but not
               exceeding $10,000,000 and (b) for NationsBank, the
               obligation of NationsBank to make New Advances in
               an aggregate amount up to but not exceeding
               $16,000,000.  The original aggregate principal
               amount of the New Advance Commitments is
               $26,000,000.

                    "New Advance Commitment Termination Date"
               shall mean 4:00 p.m. New York time on the Bond
               Proceeds Payment Date.

                    "New Advances" shall have the meaning
               ascribed to such term in Section 4.01(b) hereof.

                    "New Project Notes" shall mean the promissory
               notes provided for by Section 4.06 hereof and all
               promissory notes delivered to the Banks in
               substitution or exchange therefor, in each case as
               the same may be amended, modified and supplemented
               and in effect from time to time. 

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 22>

                    "Permitted Collateralized Indebtedness" shall
               have the meaning ascribed to such term in Section
               4.05(b)(i) hereof.

                    "Permitted Demand Date" shall mean, at any
               time, with respect to any Replacement Loan or any
               Replacement Note (subject to Section 4.05(i)
               hereof, other than the First Replacement Loan and
               the First Replacement Note), the stated maturity
               date of the Secured Debentures issued on the basis
               of (and at such time collateralized by) such
               Replacement Loan and Replacement Note.

                    "Permitted Section 4.05(b)(ii) Collateralized
               Indebtedness" shall have the meaning ascribed to
               such term in Section 4.05(b)(ii) hereof.

                    "Project Loans" shall mean the Existing
               Project Loans and the Supplemental Advances.

                    "Project Notes" shall mean the Existing Notes
               and the New Project Notes.

                    "Register" shall have the meaning ascribed to
               such term in Section 4.05(h) hereof.

                    "Relevant Instruments" shall have the meaning
               ascribed to such term in Section 4.05(c) hereof.

                    "Replacement Agent" shall have the meaning
               ascribed to such term in Section 15.08 hereof.

                    "Replacement Loans" shall mean the First
               Replacement Loan, any Subsequent Replacement Loans
               and any Temporary Replacement Loans, and
               "Replacement Loan" shall mean any of them.

                    "Replacement Note Holders" shall mean:

                         (a)  (i)  with respect to the First
                    Replacement Note, on the Extension Date and
                    prior to the pledge of the First Replacement
                    Note by TNP to the First Debenture Trustee
                    pursuant to the First Secured Debenture
                    Indenture, TNP; and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 23>

                             (ii)  with respect to any Subsequent
                    Replacement Note or any other Replacement
                    Note (other than a Released Replacement Note)
                    available at such time for pledge in
                    conjunction with a future Section 4.05
                    Closing, prior to the pledge of such
                    Subsequent Replacement Note or such other
                    Replacement Note by TNP to a Subsequent
                    Debenture Trustee pursuant to a Subsequent
                    Secured Debenture Indenture in conjunction
                    with such future Section 4.05 Closing, TNP;

                         (b)  immediately upon any such pledge of
                    any such Replacement Note referred to in
                    subclause (i) or (ii) of the preceding
                    subsection (a), but only with respect to such
                    Replacement Note so pledged (a "Pledged
                    Replacement Note"):

                              (i)  with respect to any benefits
                    (including, without limitation, rights to
                    vote on amendments or defaults and to attend
                    bank meetings) accruing to, and any
                    obligations pursuant to Sections 6.03, 15.05,
                    17.16 and 17.18 hereunder of, the holder of
                    such Pledged Replacement Note, the Debenture
                    Trustee to which such Pledged Replacement
                    Note was pledged (whether or not it shall
                    have become the legal and beneficial owner of
                    such Pledged Replacement Note for all
                    purposes); and

                             (ii)  with respect to any other
                    obligations of the holder of such Pledged
                    Replacement Note, TNP;

                         (c)  following the release of any such
                    pledge of any such Pledged Replacement Note,
                    but only with respect to such Pledged
                    Replacement Note so released (a "Released
                    Replacement Note") and prior to the pledge of
                    such Released Replacement Note in conjunction
                    with a future Section 4.05 Closing, TNP; and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 24>

                         (d)  following the transfer of any
                    Replacement Note upon the exercise of
                    remedies by a Debenture Trustee under the
                    applicable Secured Debenture Indenture, any
                    transferee of such Replacement Note (other
                    than such Debenture Trustee in its capacity
                    as trustee);

                provided that each of TNP, each Debenture Trustee
                    and any transferee shall have signed (as a
                    condition to becoming a Replacement Note Holder)
                    an instrument of adoption, substantially in the
                    form of Exhibit G hereto, agreeing to be bound by
                    and (in the case of each Debenture Trustee,
                    subject to the provisions of clause (b) above)
                    comply with terms and conditions of (x) this
                    Agreement applicable to Replacement Note Holders
                    and (y) the Intercreditor Agreement applicable to
                    the "Unit 2 Banks" (as defined in the
                    Intercreditor Agreement); and "Replacement Note
                    Holder" shall mean any of them.  Anything in the
                    foregoing to the contrary notwithstanding, TNP, as
                    Replacement Note Holder of any Replacement Note,
                    shall have no voting rights under this Agreement
                    and shall not be considered in the determination
                    of "Majority Banks" for purposes of this
                    Agreement.

                    "Replacement Note Maturity Dates" shall mean
               the First Replacement Note Maturity Date and with
               respect to any other Replacement Note, such
               Replacement Note's Permitted Demand Date or if no
               demand is made on or within 90 days after such
               Permitted Demand Date, January 1, 2050.

                    "Replacement Notes" shall mean the First
               Replacement Note, any Subsequent Replacement Notes
               and any Temporary Replacement Notes, and
               "Replacement Note" shall mean any of them.

                    "Section 3 Effective Date" shall mean the
               date on which all of the conditions set forth in
               Section 2(b) of the First Amendment shall have
               been satisfied.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 25>

                    "Section 4.05 Closing" shall have the meaning
               ascribed to such term in Section 4.05(d) hereof.

                    "Section 4.05 Closing Date" shall have the
               meaning ascribed to such term in Section 4.05(d)
               hereof.

                    "Secured Debenture Indentures" shall mean the
               First Secured Debenture Indenture and any
               Subsequent Secured Debenture Indentures, and
               "Secured Debenture Indenture" shall mean any of
               them.

                    "Secured Debentures" shall mean the First
               Secured Debentures and any Subsequent Secured
               Debentures (which may include subsequent series of
               debentures issued under any indenture supplemental
               to any Subsequent Secured Debenture Indenture),
               and may refer to the Secured Debentures of any one
               or more such series, as the context may require.

                    "Security Documents" shall mean,
               collectively, the TNP Security Agreement, the
               Subordination Agreement, the TGC II Mortgage, the
               TNP Second Lien Mortgage, the Amendment Security
               Documents and the First Amendment Security
               Documents.

                    "Subject Date" shall have the meaning
               ascribed to such term in Section 17.21(a) hereof.

                    "Subsequent Debenture Trustee" shall mean,
               with respect to any Subsequent Secured Debenture
               Indenture, the trustee, or any successor trustee,
               under such Subsequent Secured Debenture Indenture
               or, if there shall be no "trustee," per se, any
               person serving in a capacity or performing
               functions, in each case, similar to those of a
               trustee under an indenture, regardless of the name
               or legal characterization of said capacity or
               functions and, in each case, any successor in such
               capacity or performing such functions under such
               Subsequent Secured Debenture Indenture.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 26>

                    "Subsequent Replacement Loan" shall have the
               meaning ascribed to such term in Section 4.05(e)
               hereof.

                    "Subsequent Replacement Note" shall have the
               meaning ascribed to such term in Section 4.05(e)
               hereof.

                    "Subsequent Secured Debenture Indentures"
               shall mean any indenture or agreement, other than
               the First Secured Debenture Indenture, which
               provides for the issuance of and sets out the
               terms and conditions of any TNP debt which is to
               be directly or indirectly secured by the
               Collateral pursuant to and in accordance with
               Section 4.05 hereof, whether or not said agreement
               shall be denominated an "indenture" and whether or
               not said debt shall be denominated "debentures,"
               in each case, as the same may from time to time be
               amended, modified or supplemented or its
               provisions waived.

                    "Subsequent Secured Debentures" shall mean
               any TNP debt, other than the First Secured
               Debentures, which is to be directly or indirectly
               secured by the Collateral pursuant to and in
               accordance with Section 4.05 hereof, whether or
               not said debt shall be denominated "debentures". 
               Said term may refer to Subsequent Secured
               Debentures of any one or more such series, as the
               context may require.

                    "Subsequent TGC II Modification and Extension
               Agreement" shall mean a TGC II Modification and
               Extension Agreement among the Agent, the
               Collateral Agent, TNP and TGC II, substantially in
               the form of Exhibit F to the First Amendment, and
               otherwise duly completed.

                    "Temporary Replacement Loan" shall have the
               meaning ascribed to such term in Section 4.05(f)
               hereof.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 27>

                    "Temporary Replacement Note" shall have the
               meaning ascribed to such term in Section 4.05(f)
               hereof.

                    "Ten Acre Releases" shall have the meaning
               ascribed to such term in Section 17.20(c) hereof.

                    "TGC II Mortgage Modifications" shall mean 
               (a) the First TGC II Modification and Extension
               Agreement among the Agent, the Collateral Agent,
               Donald H. Snell as mortgage trustee, TNP and
               TGC II, (b) the Second TGC II Modification and
               Extension Agreement among the Agent, the
               Collateral Agent, TNP and TGC II, (c) the Third
               TGC II Modification and Extension Agreement among
               the Agent, the Collateral Agent, TNP and TGC II,
               (d) the Fourth TGC II Modification and Extension
               Agreement, among the Agent, the Collateral Agent,
               TNP and TGC II, (e) the Fifth TGC II Modification
               and Extension Agreement among the Agent, the
               Collateral Agent, TNP and TGC II, (f) each
               Subsequent TGC II Modification and Extension
               Agreement among the Agent, the Collateral Agent,
               TNP and TGC II and (g) any other modification and
               extension agreement among the Agent, the
               Collateral Agent, TNP and TGC II, which shall
               evidence of record that Replacement Loans and the
               Replacement Notes, issued in accordance with
               Section 4.05 hereof, are secured by the
               Collateral.

                    "TNP Purchase Date" shall have the meaning
               ascribed to such term in Section 4.05(f) hereof.

                    "TNP Purchase Notice" shall have the meaning
               ascribed to such term in Section 4.05(f) hereof.

                    "TNP Second Lien Mortgage Modification No. 2"
               shall mean the Second Lien Mortgage and Deed of
               Trust (with Security Agreement) Modification,
               Extension and Amendment Agreement No. 2 among the
               Agent and TNP, substantially in the form of
               Exhibit G to the First Amendment.";

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 28>

        (iii)  The definition of "Amendment Documents" shall be
               amended by inserting the word "First" before the
               term "Replacement Note";
                              
         (iv)  Delete clause (c) in the definition of "Interest
               Payment Date" and substitute in its place the
               following:

                    "(c) as to (i) the First Replacement Loan,
               each date on which TNP is obligated to make a
               deposit of cash collateral in respect of interest
               on the First Secured Debentures pursuant to
               Section 1119 of the First Secured Debenture
               Indenture and (ii) any Subsequent Replacement
               Loan, each date on which TNP is obligated to make
               a deposit of cash collateral in respect of
               interest on any Subsequent Secured Debentures
               pursuant to provisions of the applicable
               Subsequent Secured Debenture Indenture similar to
               the provisions referred to in subclause (i) of
               this clause (c) and providing for the deposit of
               cash collateral in respect of payment of
               interest.";

          (v)  The definition of "Loans" shall be amended by
               adding an "s" to the end of the term "Replacement
               Loan";

         (vi)  The definition of "Majority Banks" shall be
               amended by adding an "s" to the end of the term
               "Replacement Note Holder";

        (vii)  The definition of "Net Proceeds" shall be amended
               by inserting the phrase "when used in Section
               8.02(c) hereof," after the term "Net Proceeds"; 

       (viii)  The definition of "New Debt Securities" shall be
               amended by inserting the word "First" before the
               term "Secured Debentures";

         (ix)  The definition of "Notes" shall be amended by
               adding an "s" to the end of term "Replacement
               Note"; 

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 29>

          (x)  Delete clause (b) in the definition of "Post-
               Default Rate" and substitute in its place the
               following:

                    "(b) Subject to Section 4.05(i) hereof, in
               respect of any principal of any Replacement Loan
               or Replacement Note, a rate per annum, as of any
               date of determination, equal to the interest rate
               applicable to (x) the Secured Debentures to which
               such Replacement Loan relates as of such date of
               determination as specified in the applicable
               Secured Debenture Indenture pursuant to which such
               Secured Debentures were issued or (y) if such
               Replacement Loan does not as of such date of
               determination serve as the basis for the issuance
               of any outstanding Secured Debentures, a rate per
               annum, as of any date of determination, equal to
               the Prime Rate.";

         (xi)  The definition of "Principal Office" shall be
               amended by adding an "s" to the end of the term
               "Replacement Note Holder";

        (xii)  The definition of "Project Creditors" shall be
               amended by (A) deleting the phrase ", after the
               Extension Date," and (B) adding an "s" to the end
               of the term "Replacement Note Holder";

       (xiii)  The definition of "Project Documents" shall be
               amended by (A) adding an "s" to the end of the
               term "Replacement Note" and (B) inserting the term
               "the First Amendment Documents," after the term
               "this Agreement,";

        (xiv)  The definition of "Secured Parties" shall be
               amended by adding an "s" to the end of the term
               "Replacement Note Holder"; and

         (xv)  The definition of "Voting Participant Notice"
               shall be amended by (A) substituting the word "a"
               for "the" before the first occurrence of the term
               "Replacement Note Holder" and (B) substituting the
               word "such" for "the" before the second occurrence
               of such term.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 30>

     (e)  Section 1.02 of the Credit Agreement shall be amended
          by (A) deleting the phrase "the Replacement Note
          Holder" in the second sentence thereof and inserting in
          lieu thereof the phrase "any of the Replacement Note
          Holders" and (B) deleting the phrase "the Secured
          Debenture Indenture" in the third sentence thereof and
          inserting in lieu thereof the phrase "any of the
          Secured Debenture Indentures".

     (f)  Section 2 of the Credit Agreement shall be amended by
          inserting the phrase "and, with respect to a Section
          4.05 Closing, the purchase by TNP of Project Loans on a
          TNP Purchase Date or the purchase by the Designee of
          Project Loans on the Designee Purchase Date (in each
          case, assuming the due execution and delivery of
          documents required to be delivered in connection
          therewith and the performance of other conditions
          precedent thereto by the parties (other than TNP or TGC
          II) thereto), the applicable Section 4.05 Closing Date,
          TNP Purchase Date or Designee Purchase Date" after each
          occurrence of the term "Extension Date" therein.

     (g)  Section 2.10 of the Credit Agreement shall be amended
          by inserting after the word "Except" the following:

          "(i)  for the replacement of Project Notes by
          Replacement Notes, and (ii)".

     (h)  Section 2.22 of the Credit Agreement shall be amended
          by inserting after the word "Except" the following:

          "(i)  for the replacement of Project Notes by
          Replacement Notes, and (ii)".

     (i)  Section 4.01 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 4.01.  Existing Loans; New Advance
          Commitments and New Advances.

               (a)  Existing Loans.  The parties hereto
          acknowledge, confirm and agree that there are
          outstanding on the First Amendment Effective Date loans
          (the "Existing Loans") under the Credit Agreement in an
          aggregate principal amount of $223,500,000, the

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 31> 

     principal amount of such Existing Loans held by banks
     (the "Existing Banks") on the First Amendment Effective Date
     being the amount set forth opposite the name of such Existing
     Bank's name on the signature pages of the First Amendment under
     the caption "Existing Loan".  Prior to the Bond Proceeds Payment
     Date, the Existing Loans shall be evidenced by notes (the
     "Existing Notes") held by the Existing Banks and on and after the
     Bond Proceeds Payment Date, the Existing Loans shall be evidenced
     by the New Project Notes held by the Existing Banks.  The
     Existing Loans may be continued or Converted pursuant to Section
     4.04 hereof.  TGC II hereby agrees to repay the principal of, and
     to pay interest on, the Existing Loans as set forth in this
     Agreement.  No Existing Bank shall be entitled to have its
     Existing Note subdivided, by exchange or otherwise, except in
     connection with a sale, assignment or transfer of all or any
     portion of such Existing Bank's Loans and Notes pursuant to
     Section 16.01 hereof.  Each Bank hereby waives the aggregate
     amount (if any) payable to such Bank under Section 7.05 hereof as
     a result of TGC II's prepayments of Existing Project Loans made
     on the Bond Proceeds Payment Date.  

               (b)  New Advances.

                    (i)  New Advances.  Each New Advance Bank
          severally agrees, on the terms and conditions of this
          Agreement, to make a single loan to TGC II in Dollars
          on the New Advance Closing Date in an aggregate
          principal amount up to but not exceeding the amount of
          the New Advance Commitment of such New Advance Bank
          (such loans being herein called "New Advances").  Any
          portion of the New Advance Commitments not used on the
          New Advance Closing Date shall be automatically
          terminated on the New Advance Closing Date.  The New
          Advance Commitments once terminated may not be
          reinstated.  The New Advances may be continued or
          Converted pursuant to Section 4.04 hereof.  TGC II
          hereby agrees to repay the principal of, and to pay
          interest on, the New Advances as set forth in this
          Agreement.  The New Advances made by each New Advance
          Bank shall be evidenced by the New Project Note of such
          New Advance Bank.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 32>

                   (ii)  Borrowings and Notices.  

                    (A)  If TGC II shall have given the Agent
               notice of borrowing in accordance with clause (C)
               of this Subsection 4.01(b)(ii), not later than
               1:00 p.m. New York time on the New Advance Closing
               Date, each New Advance Bank shall make available
               the amount of the New Advance or New Advances to
               be made by it on such date to the Agent, at
               account number NYAO-DI-900-9-000002 maintained by
               the Agent with Chase at the Principal Office, in
               immediately available funds, for account of TGC
               II.

                    (B)  TGC II hereby irrevocably instructs the
               Agent to apply the proceeds of the New Advances to
               the immediate prepayment of a like principal
               amount of Existing Loans of the Existing Banks. 
               Notwithstanding anything contained herein to the
               contrary, such prepayment shall not result in an
               increase in the Available Supplemental Advance
               Commitment.

                    (C)  A notice by TGC II to the Agent of
               borrowings of New Advances shall be irrevocable
               and shall be effective only if received by the
               Agent not later than 11:00 a.m. New York time one
               Business Day (with respect to a Prime Rate Loan),
               two Business Days (with respect to a CD Rate Loan)
               and three Business Day (with respect to a
               Eurodollar Rate Loan) prior to the New Advance
               Closing Date, and the Agent shall give each New
               Advance Bank prompt notice thereof.  Such notice
               shall specify the amount of New Advances to be
               borrowed and the Type of New Advances to be
               borrowed.  Such notice shall specify the duration
               of an Interest Period (if any) and the New Advance
               to which such Interest Period is to relate.  In
               the event that TGC II fails to select the Type of
               New Advance, or the duration of any Interest
               Period for a Eurodollar Rate Loan or CD Rate Loan,
               as provided in this subsection (ii), such New
               Advance shall be made as a Prime Rate Loan.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 33>

                    (D)  Unless the Agent shall have received
               notice from a New Advance Bank prior to the date
               of any borrowing that such New Advance Bank will
               not make available to the Agent the amount of such
               New Advance Bank's New Advance Commitment, the
               Agent may assume that such New Advance Bank has
               made such portion available to the Agent on the
               date of such borrowing in accordance with clause
               (A) of Subsection 4.01(b)(ii) hereof and the Agent
               may, in reliance upon such assumption, make
               available to TGC II on such date a corresponding
               amount.  If the amount of such New Advance Bank's
               New Advance Commitment is made available to the
               Agent on a date after the date of such borrowing,
               such New Advance Bank shall pay to the Agent on
               demand an amount equal to the product of (A) the
               daily average Federal Funds Rate during such
               period as quoted by the Agent times (B) the amount
               of such New Advance Bank's New Advance Commitment
               times (C) the number of days that elapse from and
               including the date of such borrowing to the date
               on which such New Advance Bank's ratable portion
               of such borrowing shall have been made available
               to the Agent.  A certificate of the Agent
               submitted to any New Advance Bank with respect to
               any amounts owing under this Section 4.01 shall be
               conclusive absent manifest error.  If the amount
               of such New Advance Bank's New Advance Commitment
               is not in fact made available to the Agent by such
               New Advance Bank within three Business Days after
               the date of such borrowing, TGC II agrees to pay
               to the Agent, on demand, an amount equal to the
               amount of such New Advance Bank's New Advance
               Commitment together with interest thereon, for
               each day from the date such amount was made
               available to TGC II until the date such amount is
               repaid to the Agent, at the interest rate
               applicable at the time to the Loans comprising
               such borrowing.

             (iii)  Several Obligations; Remedies Independent. 
          The failure of any New Advance Bank to make the New
          Advance to be made by it on the date specified therefor
          shall not relieve any other New Advance Bank of its
          obligation to make its New Advance on such date, but

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 34> 

     neither any New Advance Bank nor the Agent shall be
     responsible for the failure of any other New Advance Bank to make
     a New Advance to be made by such other New Advance Bank, and no
     New Advance Bank shall have any obligation to the Agent or any
     other New Advance Bank for the failure by such New Advance Bank
     to make any New Advance required to be made by such New Advance
     Bank.  The amounts payable by TGC II at any time hereunder and
     under the New Project Notes to each New Advance Bank shall be a
     separate and independent debt and each New Advance Bank shall be
     entitled to protect and enforce its rights arising out of this
     Agreement and the New Project Notes, and it shall not be
     necessary for any other Bank or the Agent to consent to, or be
     joined as an additional party in, any proceedings for such
     purposes.".

     (j)  Section 4.05 of the Credit Agreement shall be amended
          as follows:

          (i)  Subsection (a) shall be amended by inserting, with
               or without underscoring as appropriate, the word
               "First" before each occurrence of the following
               terms:  "Secured Debentures", "Replacement Loan"
               and "Replacement Note";

         (ii)  Delete subsection (b) in its entirety; and

        (iii)  Add new subsections (b), (c), (d), (e), (f), (g),
               (h) and (i) as follows:

                    "(b) (i)  Subject to the provisions of
               Section 4.05(b)(ii) hereof, additional or
               replacement (A) indebtedness of TNP consisting of
               Secured Debentures issued on the basis of (and
               collateralized by) Replacement Notes issued
               hereunder which are in turn secured by the
               Collateral and/or (B) indebtedness of TGC II
               consisting of (1) Project Loans and/or (2)
               Replacement Loans (the indebtedness referred to in
               the foregoing clauses (A) and (B) hereinafter
               referred to as "Permitted Collateralized
               Indebtedness") may be secured, directly or
               indirectly, by the Collateral, provided that in
               any such case the liens and security interests on

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 35> 

          the Collateral directly or indirectly securing
          Permitted Collateralized Indebtedness are provided on
          substantially the same terms and conditions as the liens and
          security interests securing the Loans outstanding on the First
          Amendment Effective Date and (B) the aggregate principal amount
          of Loans outstanding hereunder may not at any time be greater
          than the Collateral Coverage Maximum Amount at such time.

                        (ii)  Until the payment, prepayment or
               purchase in full of the Project Loans outstanding
               on the First Amendment Effective Date, all
               interest due and payable thereon and all other
               amounts due and payable by TNP and TGC II to the
               Banks under this Agreement (including, without
               limitation, all Supplemental Advances) and the
               other Project Documents and so long as any of the
               First Secured Debentures remain outstanding, only
               additional or replacement Permitted Collateralized
               Indebtedness constituting debt securities (and not
               bank debt) or Loans ("Section 4.05(b)(ii)
               Permitted Collateralized Indebtedness") may be
               secured, directly or indirectly, by the Collateral
               and only if (A) the terms, conditions and
               limitations of Section 4.05(b)(i) hereof are
               satisfied and complied with, (B) the proceeds of
               any such additional Permitted Section 4.05(b)(ii)
               Permitted Collateralized Indebtedness of TNP are
               applied to purchase Project Loans outstanding on
               the First Amendment Effective Date or Supplemental
               Advances, (C) any such additional or replacement
               Permitted Section 4.05(b)(ii) Collateralized
               Indebtedness of TNP (and the related Section
               4.05(b)(ii) Collateralized Indebtedness of TGC II
               constituting Replacement Loans) has maturities
               longer than the Project Notes outstanding on the
               First Amendment Effective Date and then
               outstanding and not shorter than the maturity of
               the First Secured Debentures then outstanding, (D)
               any such additional or replacement Permitted
               Section 4.05(b)(ii) Collateralized Indebtedness of
               TNP (and the related Section 4.05(b)(ii)
               Collateralized Indebtedness of TGC II constituting
               Replacement Loans) is not subject to prepayment

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 36> 

          (except on the same terms and conditions of prepayment
          applicable to the First Secured Debentures) prior to the maturity
          date of the First Secured Debentures then outstanding and (E) any
          such additional or replacement Permitted Section 4.05(b)(ii)
          Collateralized Indebtedness of TNP (and the related Section
          4.05(b)(ii) Collateralized Indebtedness of TGC II constituting
          Replacement Loans) is subject to other covenants, terms,
          conditions and restrictions for the benefit of the Secured
          Parties substantially the same as those herein with respect to
          the First Secured Debentures.

                    (c)  Upon each occasion that TNP or TGC II 
               desires to issue additional or replacement
               Permitted Collateralized Indebtedness (other than
               Permitted Collateralized Indebtedness constituting
               Project Loans):  

                         (i)  TNP and TGC II shall deliver, not
               less than 30 days prior to the anticipated date of
               the applicable Section 4.05 Closing (which shall
               be a Business Day other than a Scheduled Reduction
               Date), to the Agent (A) an initial notice (a "4.05
               Notice") of its intention to issue such Permitted
               Collateralized Indebtedness containing the
               proposed terms of such Permitted Collateralized
               Indebtedness and the terms of the security
               therefor in sufficient detail to enable the Agent,
               the Banks (if any Project Loans are outstanding)
               and the Replacement Note Holders to determine
               whether such terms comply with the terms and
               conditions of Section 4.05(b) hereof, (B)
               substantially final forms of each document,
               certificate, title information report, Uniform
               Commercial Code financing statement and other
               instrument (the "Relevant Instruments") required
               to be delivered by TNP or TGC II to the Agent
               under this Section 4.05 in connection with the
               applicable Section 4.05 Closing, (C) a certificate
               signed by an Authorized Officer of each of TNP and
               TGC II to the effect that such terms comply with
               the terms and conditions of Section 4.05(b) hereof
               and (D) an opinion of counsel for each of TNP and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 37> 

          TGC II substantially in the form of Exhibit H to the
          First Amendment.  TNP and TGC II shall deliver promptly to the
          Agent such additional information as the Agent may reasonably
          request concerning the proposed transaction;

                        (ii)  the Agent shall within five days of
               receipt of a 4.05 Notice forward to each Bank (if
               any Project Loans are outstanding) and each
               Replacement Note Holder a copy of such 4.05 Notice
               and a copy of each of the Relevant Instruments
               received by the Agent in connection with such 4.05
               Notice.  Not later than ten days after receipt of
               such 4.05 Notice from the Agent, the Majority
               Banks or the Banks (if any Project Loans are
               outstanding) holding at least 66-2/3% of the
               outstanding principal amount of the Project Loans,
               or the Agent acting with the consent of such
               Banks, may forward to each of TNP and TGC II a
               notice stating that, the terms and conditions of
               the proposed Section 4.05 Closing do not meet the
               terms and conditions set forth in Section 4.05
               hereof and stating with reasonable specificity why
               said terms and conditions do not  meet the terms
               and conditions of Section 4.05 hereof; and

                       (iii)  TNP or TGC II shall (A) revise the
               terms and conditions of the proposed transaction
               such that the terms and conditions of Section 4.05
               hereof are in fact satisfied by the terms and
               conditions of the proposed transaction or (B)
               cancel the proposed transaction.

                    (d)  TNP shall designate a date that is a
               Business Day for the closing of the proposed
               transactions.  The designation shall be made by
               notice received by the Agent not less than 20 days
               after the notice under Section 4.05(c)(i) and not
               less than six days prior to such designated date. 
               The proposed transaction shall be effected at a
               closing (a "Section 4.05 Closing") on such
               designated date or such other date (a
               "Section 4.05 Closing Date") as may be agreed upon
               by TNP, TGC II and the Agent.  Prior to or at each
               Section 4.05 Closing:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 38>

                         (i)  TNP, TGC II, the Agent and, as
               applicable, the Collateral Agent each shall sign
               and deliver, in recordable form to the Agent and,
               as applicable, the Collateral Agent, such
               financing statements under the Uniform Commercial
               Code as are necessary to protect, preserve and
               maintain the priority of the liens contemplated by
               the Security Documents and TNP and TGC II shall
               provide (A) copies of Uniform Commercial Code
               search reports with respect to each of TGC II and
               TNP, as "debtor", in each jurisdiction in which
               such financing statements are to be filed and (B)
               all other instruments to be recorded or filed or
               delivered in connection with such Section 4.05
               Closing;

                        (ii)  TGC II shall deliver to the Agent a
               Subsequent TGC II Modification and Extension
               Agreement and, at the sole cost of TNP and TGC II,
               the Title Company shall have issued to the Agent,
               a T-38 endorsement (or if a T-38 endorsement is no
               longer available, such other endorsement as shall
               have the same scope and purpose as a T-38
               endorsement on the First Amendment Effective Date)
               to the title policy or policies which insure the
               lien of the TGC II Mortgage securing the Loans
               outstanding hereunder and evidenced by Project
               Notes or Replacement Notes on such date, each with
               respect to such Subsequent TGC II Mortgage
               Modification and Extension Agreement;

                       (iii)  At the sole cost of TNP and TGC II,
               the Title Company shall deliver to the Agent a
               title information report, showing that good and
               indefeasible title to the TGC II Mortgage Trust
               Estate is vested in TGC II and that the TGC II
               Mortgage constitutes a valid first mortgage lien
               on the TGC II Mortgage Trust Estate and showing
               that there are no intervening liens which would
               adversely affect the priority of the liens
               securing the Loans, subject only to the Permitted
               Liens;

                        (iv)  TNP and TGC II each shall deliver
               to the Agent legal opinions of counsel to TNP and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 39> 

          TGC II dated the applicable Section 4.05 Closing Date
          and substantially in the forms of Exhibit I hereto;

                         (v)  TNP and TGC II each shall deliver
               to the Agent (A) certified copies of the
               resolutions of its board of directors authorizing
               the issuance of such Permitted Collateralized
               Indebtedness and the collateral therefor furnished
               pursuant to the terms and conditions of this
               Section 4.05 and authorizing the execution,
               delivery and performance of the documentation
               necessary therefor and (B) certified copies of its
               charter, bylaws, good standing certificates and
               franchise tax certificates from the State of Texas
               and all other places where necessary in light of
               the business and properties it conducts and owns
               and intends to conduct and own;

                        (vi)  TNP and TGC II each shall deliver
               to the Agent a certificate signed by an Authorized
               Officer of TNP or TGC II, as applicable, and dated
               the applicable Section 4.05 Closing Date
               certifying the name, incumbency and signature of
               each individual authorized to execute any
               documents or certificates in connection with such
               Section 4.05 Closing, upon which certificates and
               documents the Secured Parties may conclusively
               rely;

                       (vii)  TNP and TGC II each shall deliver
               to the Agent a certificate signed by an Authorized
               Officer of TNP or TGC II, as applicable, and dated
               the applicable Section 4.05 Closing Date
               certifying that there shall be no injunction,
               writ, preliminary restraining order or any other
               order of any nature issued by any arbitrator,
               court or other governmental authority directing
               that the transactions conducted, or the
               transactions contemplated in the documentation
               executed and/or delivered, at such Section 4.05
               Closing not be consummated as herein or therein
               provided and certifying further, except as
               disclosed herein, there shall be no material
               litigation, investigation or proceeding of or

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 40> 

          before any arbitrator, court or other governmental
          authority pending or (to the best of such Authorized Officer's
          knowledge, threatened) against TNP or TGC II or affecting any of
          their respective properties, rights, revenues or assets, or the
          Project or any of the transactions to be effected at such Section
          4.05 Closing;

                      (viii)  TNP and TGC II each shall deliver
               to the Agent a certificate signed by an Authorized
               Officer of TNP or TGC II, as applicable, and dated
               the applicable Section 4.05 Closing Date
               certifying that (A) the representations and
               warranties of each of TNP and TGC II, as
               applicable, contained in Section 2 hereof and in
               each of the other Project Documents to which such
               Person is a party shall be true and correct on and
               as of such Section 4.05 Closing Date as if made on
               and as of such date (or, if stated to have been
               made solely as of an earlier date, were true and
               correct as of such earlier date), (B) no Default
               hereunder, and no default by either TNP or TGC II
               under any of the other Project Documents to which
               either TNP or TGC II is a party, has occurred and
               is continuing on such date and (C) to the best of
               such Authorized Officer's knowledge, no default by
               any other Person to any other Project Document has
               occurred and is continuing on such date;

                        (ix)  TNP and TGC II each shall deliver
               to the Agent a certificate signed by an Authorized
               Officer of TNP or TGC II, as applicable,
               certifying that (A) it has obtained all Government
               Approvals necessary under applicable laws and
               regulations in connection with each of the
               transactions contemplated by the applicable
               Section 4.05 Closing and (B) all such Government
               Approvals have been duly obtained, were validly
               issued and are held by and in the name of TNP or
               TGC II, as applicable, and are final, in full
               force and effect and not subject to appeal; and

                         (x)  TNP and TGC II shall (A) if the
               transactions then consummated involve a refunding
               of existing Secured Debentures already secured by

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 41> 

          the Collateral, pay to the relevant Debenture Trustee
          in Dollars, in immediately available funds, all amounts due and
          payable under the applicable Secured Debenture Indenture, (B) if
          the transactions then consummated involve the purchase by TNP or
          TGC II of Existing Project Loans, pay to the Agent in Dollars, in
          immediately available funds, the purchase price for the Existing
          Project Loans then being purchased pro rata from the Existing
          Project Banks and (C) if the transactions then consummated
          involve the purchase by TNP or TGC II of Supplemental Advances,
          pay to the Agent in Dollars, in immediately available funds, the
          purchase price for the Supplemental Advances then being purchased
          pro rata from the Supplemental Advance Banks.  

               After the payment, prepayment or purchase in full
               of the Project Loans outstanding on the First
               Amendment Effective Date, all interest due and
               payable thereon and all other amounts due and
               payable by TNP and TGC II to the Banks under this
               Agreement (including, without limitation, all
               Supplemental Advances) and the other Project
               Documents, the Agent shall be entitled to rely
               solely upon the certificates and opinions of
               counsel delivered hereunder in making any
               determinations required to be made by the Agent in
               this Section 4.05.

                    (e)  If the transactions then consummated
               involve the purchase by TNP of Existing Project
               Loans or Supplemental Advances, then on each such
               Section 4.05 Closing Date (and, if such Section
               4.05 Closing Date is prior to the Section 3
               Effective Date, subject to Section 5.02(b)(iii)
               hereof) TNP shall purchase from each of the Banks
               holding Project Loans of the applicable Class (pro
               rata according to the aggregate outstanding
               principal amount of each such Bank's Project Loans
               of such Class held by such Bank) a portion of such
               Bank's Project Loans of the applicable Class and
               each Bank shall sell to TNP (without recourse and
               without any representation or warranty whatsoever
               other than as to title and absence of liens) such

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 42> 

          pro rata portion of such Bank's Project Loans of the
          applicable Class such that the aggregate principal amount of
          Project Loans of the applicable Class so purchased is equal to
          the amount of the proceeds (at the election of TNP, net of any
          offering or similar transaction costs) from any Subsequent
          Secured Debentures issued on such Section 4.05 Closing Date.  The
          purchase price for the Project Loans of the applicable Class so
          purchased by TNP shall be equal to the principal amount thereof. 
          Simultaneously with the sale of each Bank's Project Loans of the
          applicable Class to TNP, TGC II shall pay to the Agent, for the
          account of each Bank holding Project Loans of applicable Class,
          all accrued and unpaid interest on such portion of such Bank's
          Project Loans of the applicable Class to be sold to TNP plus the
          aggregate amount (if any) which would have been payable to each
          Bank holding Project Loans of applicable Class under Section 7.05
          hereof had such portion of the Project Loans of the applicable
          Class then been prepaid rather than purchased.  TNP shall pay the
          aggregate amount of such purchase price at such Section 4.05
          Closing to the Agent, for the account of each respective Bank
          holding Project Loans of the applicable Class, in Dollars in
          immediately available funds.  Effective immediately upon the
          payment by TNP of such purchase price, the aggregate principal
          amount of the outstanding Project Loans of the applicable Class
          so purchased by TNP shall be converted into a loan or loans (with
          respect to such purchase of Project Loans of the applicable Class
          from the proceeds of any Subsequent Secured Debentures, in each
          case, whether one or more, each a "Subsequent Replacement Loan")
          of equal principal amount.  TGC II shall execute and deliver to
          TNP at such Section 4.05 Closing a promissory note or notes (with
          respect to the purchase of each Subsequent Replacement Loan, in
          each case, whether one or more, each a "Subsequent Replacement
          Note") payable to TNP or its registered assigns in an aggregate
          principal amount equal to the aggregate principal amount of such
          Subsequent Replacement

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 43> 

          Loan, as applicable, and, in each case, substantially
          in the form of Exhibit B to the First Amendment and otherwise
          duly completed.  Any such Subsequent Replacement Notes shall be
          dated, and shall bear interest from, the Section 4.05 Closing
          Date on which any such Subsequent Replacement Notes, as
          applicable, are issued.  No Replacement Note Holder shall be
          entitled to have its Replacement Note subdivided, by exchange for
          promissory notes of lesser denominations or otherwise, except in
          connection with a Section 4.05 Closing or in connection with an
          assignment to TNP of a portion of a Replacement Loan and
          Replacement Note in conjunction with a release of a Pledged
          Replacement Note (as defined in the definition of "Replacement
          Note Holder" in Section 1.01 hereof) expressly contemplated by
          the related Secured Debenture Indenture.  The indebtedness
          evidenced by any Subsequent Replacement Notes, together with the
          indebtedness evidenced by the First Replacement Note and by the
          Project Notes, shall be secured by the Security Documents.  Each
          Bank shall, prior to any transfer of such Bank's Project Note,
          place on such Project Note a notation to the effect that a
          portion of the indebtedness evidenced thereby has been
          transferred to TNP pursuant to this Section 4.05; provided, that,
          if TNP purchases the entire outstanding principal amount of a
          Bank's Project Loans and TNP pays to such Bank all interest due
          and payable on such Project Loans and all other amounts due and
          payable by TNP and TGC II to such Bank under this Agreement and
          the other Project Documents, such Bank shall endorse and deliver
          its Project Note to TNP and, upon endorsement to TNP of all such
          Project Notes (x) such Project Notes shall automatically, without
          further action by any Person, become Subsequent Replacement Notes
          (and the indebtedness evidenced thereby shall automatically,
          without further action by any Person, become Subsequent
          Replacement Loans) having an outstanding principal amount equal
          to the outstanding principal amount of the Project Loans at the
          time of such purchase and shall automatically, without further
          action by any

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 44> 

          Person, have the Replacement Note Maturity Date, the
          interest rate (including without limitation the Post-Default
          Rate) and all other terms and conditions contemplated by this
          Agreement to be applicable to a Subsequent Replacement Loan and a
          Subsequent Replacement Note that do not at such time serve as the
          basis for the issuance of outstanding Secured Debentures and (y)
          such Project Notes (and the indebtedness evidenced thereby) as so
          recharacterized as Subsequent Replacement Notes and Subsequent
          Replacement Loans shall be available to TNP and TGC II for use in
          conjunction with a future Section 4.05 Closing (and in connection
          therewith, such Project Note as so recharacterized as a
          Subsequent Replacement Note may, at the option of TNP and TGC II,
          be replaced by a replacement Replacement Note in the form of
          Exhibit B to the First Amendment).

                    (f)  (i)  Subject to the provisions of this
               clause (f), TNP shall have the right to purchase
               Project Loans of any Class from the Banks at any
               time or from time to time provided that:  (A) TNP
               shall give the Agent notice of each such purchase
               which notice shall be irrevocable, shall be
               effective only if received by the Agent not later
               than 12:00 noon New York time five Business Days
               prior to the date of the purchase and shall
               specify the aggregate principal amount and Class
               of the Project Loans to be purchased and the date
               of purchase (which shall be a Business Day) (each
               such notice, a "TNP Purchase Notice" and each such
               date of purchase, a "TNP Purchase Date"), (B) TNP
               shall not be entitled to designate a Scheduled
               Reduction Date as a TNP Purchase Date and (C) TNP
               shall satisfy the conditions precedent to such
               purchase set forth in clause (ii) below.  The
               Agent shall promptly notify the Banks and each
               Replacement Note Holder of the contents of each
               TNP Purchase Notice.  On each TNP Purchase Date,
               TNP shall purchase from each of the Banks holding
               Project Loans of the applicable Class (pro rata
               according to the aggregate outstanding principal
               amount of each such Bank's Project Loans of such
               Class held by such Bank) a portion of such Bank's

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 45> 

          Project Loans of the applicable Class and each Bank
          shall sell to TNP (without recourse and without any
          representation or warranty whatsoever other than as to title and
          absence of liens) such pro rata portion of such Bank's Project
          Loans of the applicable Class such that the aggregate principal
          amount of Project Loans of the applicable Class so purchased is
          equal to the amount of Project Loans of the applicable Class
          specified for purchase in the TNP Purchase Notice related to such
          TNP Purchase Date.  The purchase price for the Project Loans of
          the applicable Class so purchased by TNP shall be equal to the
          principal amount thereof.  Simultaneously with the sale of each
          Bank's Project Loans of the applicable Class to TNP, TGC II shall
          pay to the Agent, for the account of each Bank holding Project
          Loans of applicable Class, all accrued and unpaid interest on
          such portion of such Bank's Project Loans of the applicable Class
          to be sold to TNP plus the aggregate amount (if any) which would
          have been payable to each Bank holding Project Loans of
          applicable Class under Section 7.05 hereof had such portion of
          the Project Loans of the applicable Class then been prepaid
          rather than purchased.  TNP shall pay the aggregate amount of
          such purchase price on such TNP Purchase Date to the Agent, for
          the account of each respective Bank holding Project Loans of the
          applicable Class, in Dollars in immediately available funds. 
          Effective immediately upon the payment by TNP of such purchase
          price, the aggregate principal amount of the outstanding Project
          Loans of the applicable Class so purchased by TNP shall be
          converted into a loan or loans (with respect to each such
          purchase of Project Loans of the applicable Class, each a
          "Temporary Replacement Loan") of equal principal amount.  TGC II
          shall execute and deliver to TNP on such TNP Purchase Date a
          promissory note or notes (with respect to the purchase of each
          Temporary Replacement Loan, whether one or more, the "Temporary
          Replacement Note") payable to TNP or its registered assigns in an
          aggregate principal amount equal to the aggregate principal
          amount of

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 46> 

          such Temporary Replacement Loan and, in each case,
          substantially in the form of Exhibit B hereto and otherwise duly
          completed.  Each Temporary Replacement Note shall be dated, and
          shall bear interest from, the TNP Purchase Date on which such
          Temporary Replacement Note is issued.  The indebtedness evidenced
          by any Temporary Replacement Notes, together with the
          indebtedness evidenced by the other Replacement Notes and by the
          Project Notes, shall be secured by the Security Documents.  Each
          Bank shall, prior to any transfer of such Bank's Project Note,
          place on such Project Note a notation to the effect that a
          portion of the indebtedness evidenced thereby has been
          transferred to TNP pursuant to this clause (f); provided, that,
          if TNP purchases the entire outstanding principal amount of a
          Bank's Project Loans and TNP pays to such Bank all interest due
          and payable on such Project Loans and all other amounts due and
          payable by TNP and TGC II to such Bank under this Agreement and
          the other Project Documents, such Bank shall endorse and deliver
          its Project Note to TNP and, upon endorsement to TNP of all such
          Project Notes (x) such Project Notes shall automatically, without
          further action by any Person, become Subsequent Replacement Notes
          (and the indebtedness evidenced thereby shall automatically,
          without further action by any Person, become Subsequent
          Replacement Loans) having an outstanding principal amount equal
          to the outstanding principal amount of the Project Loans at the
          time of such purchase and shall automatically, without further
          action by any Person, have the Replacement Note Maturity Date,
          the interest rate (including without limitation the Post-Default
          Rate) and all other terms and conditions contemplated by this
          Agreement to be applicable to a Subsequent Replacement Loan and a
          Subsequent Replacement Note that do not at such time serve as the
          basis for the issuance of outstanding Secured Debentures and (y)
          such Project Notes (and the indebtedness evidenced thereby) as so
          recharacterized as Subsequent Replacement Notes and Subsequent
          Replacement Loans shall be available to TNP and TGC II for use in

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 47> 

          conjunction with a future Section 4.05 Closing (and in
          connection therewith, such Project Note as so recharacterized as
          a Subsequent Replacement Note may, at the option of TNP and TGC
          II, be replaced by a replacement Replacement Note in the form of
          Exhibit B to the First Amendment).  Temporary Replacement Loans
          and Temporary Replacement Notes shall be held by TNP and may not
          be assigned in whole or in part, and TNP shall not be entitled to
          have any Temporary Replacement Note subdivided, by exchange for
          promissory notes of lesser denominations or otherwise, except in
          conjunction with a future Section 4.05 Closing in which event the
          portion of such Temporary Replacement Loans and Temporary
          Replacement Notes assigned to a Replacement Note Holder or
          Replacement Note Holders shall be and become Subsequent
          Replacement Loans and Subsequent Replacement Notes for all
          purposes under this Agreement.

                        (ii)  Prior to or on each TNP Purchase
               Date:

                         (A)  TNP, TGC II, the Agent and, as
                    applicable, the Collateral Agent each shall
                    sign and deliver, in recordable form to the
                    Agent and, as applicable, the Collateral
                    Agent, financing statements under the Uniform
                    Commercial Code as are necessary to protect,
                    preserve and maintain the priority of liens
                    contemplated by the Security Documents and
                    TNP and TGC II shall provide (A) copies of
                    Uniform Commercial Code search reports with
                    respect to each of TGC II and TNP, as
                    "debtor", in each jurisdiction in which such
                    financing statements are to be filed and (B)
                    all other instruments to be recorded or filed
                    or delivered in connection with the purchases
                    of Project Loans to be made on such TNP
                    Purchase Date;

                         (B)  TGC II shall deliver to the Agent a
                    Subsequent TGC II Modification and Extension
                    Agreement and, at the sole cost of TNP and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 48> 

          TGC II, the Title Company shall have issued to the
          Agent, a T-38 endorsement (or if a T-38 endorsement is no longer
          available, such other endorsement as shall have the same scope
          and purpose as a T-38 endorsement on the First Amendment
          Effective Date) to the title policy or policies which insure the
          lien of the TGC II Mortgage securing the Loans outstanding
          hereunder and evidenced by Project Notes or Replacement Notes on
          such date, each with respect to such Subsequent TGC II Mortgage
          Modification and Extension Agreement;

                         (C)  At the sole cost of TNP and TGC II,
                    the Title Company shall deliver to the Agent
                    a title information report, showing that good
                    and indefeasible title to the TGC II Mortgage
                    Trust Estate is vested in TGC II and that the
                    TGC II Mortgage constitutes a valid first
                    mortgage lien on the TGC II Mortgage Trust
                    Estate and showing that there are no
                    intervening liens which would adversely
                    affect the priority of the liens securing the
                    Loans, subject only to the Permitted Liens;
                    and

                         (D)  TNP or TGC II shall deliver to the
                    Agent such other certificates, documents or
                    other information in connection with the
                    purchases of Project Loans to be made on such
                    TNP Purchase Date as the Agent may reasonably
                    determine are necessary to effect the
                    transactions contemplated on such TNP
                    Purchase Date.

                    (g)  (i)  Subject to the provisions of this
               clause (g), TNP shall have the right to cause a
               purchase by one or more banks or other financial
               institutions (or an agent on behalf of one or more
               banks or other financial institutions) designated
               by TNP (such banks or financial institutions or
               such agent herein being collectively referred to
               as the "Designee") of all (but not part) of the
               outstanding Project Loans from the Banks at any

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 49> 

     time or from time to time provided that:  (A) TNP shall
     give the Agent notice of each such purchase which notice shall be
     irrevocable, shall be effective only if received by the Agent not
     later than 12:00 noon New York time five Business Days prior to
     the date of the purchase (which shall be a Business Day) (each
     such notice, a "Designee Purchase Notice" and each such date of
     purchase, a "Designee Purchase Date"), (B) TNP shall not be
     entitled to designate a Scheduled Reduction Date as a Designee
     Purchase Date and (C) TNP shall satisfy the conditions precedent
     to such purchase set forth in clause (ii) below.  The Agent shall
     promptly notify the Banks and each Replacement Note Holder of the
     contents of each Designee Purchase Notice.  On each Designee
     Purchase Date, the Designee shall purchase from each of the Banks
     all of such Bank's Project Loans and each Bank shall sell to the
     Designee (without recourse and without any representation or
     warranty whatsoever other than as to title and absence of liens)
     all of such Bank's Project Loans.  The purchase price for the
     Project Loans so purchased by the Designee shall be equal to the
     principal amount thereof.  Simultaneously with the sale of each
     Bank's Project Loans to the Designee, TGC II shall pay to the
     Agent, for the account of each Bank all accrued and unpaid
     interest on such Bank's Project Loans plus the aggregate amount
     (if any) which would have been payable to each Bank under Section
     7.05 hereof had such Project Loans then been prepaid rather than
     purchased.  The Designee shall pay the aggregate amount of such
     purchase price on such Designee Purchase Date to the Agent, for
     the account of the Banks, in Dollars in immediately available
     funds.  Each Bank shall, prior to any transfer of such Bank's
     Project Note, place on such Project Note a notation to the effect
     that the indebtedness evidenced thereby has been transferred to
     the Designee pursuant to this clause (g).  

                        (ii)  Prior to or on each Designee
               Purchase Date:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 50>

                         (A)  TNP, TGC II, the Agent and, as
                    applicable, the Collateral Agent each shall
                    sign and deliver, in recordable form to the
                    Agent and, as applicable, the Collateral
                    Agent, financing statements under the Uniform
                    Commercial Code as are necessary to protect,
                    preserve and maintain the priority of the
                    liens contemplated by the Security Documents
                    and TNP and TGC II shall provide (A) copies
                    of Uniform Commercial Code search reports
                    with respect to each of TGC II and TNP, as
                    "debtor", in each jurisdiction in which such
                    financing statements are to be filed and (B)
                    all other instruments to be recorded or filed
                    or delivered in connection with the purchases
                    of Project Loans to be made on such Designee
                    Purchase Date;

                         (B)  TGC II shall deliver to the Agent a
                    Subsequent TGC II Modification and Extension
                    Agreement and, at the sole cost of TNP and
                    TGC II, the Title Company shall have issued
                    to the Agent, a T-38 endorsement (or if a
                    T-38 endorsement is no longer available, such
                    other endorsement as shall have the same
                    scope and purpose as a T-38 endorsement on
                    the First Amendment Effective Date) to the
                    title policy or policies which insure the
                    lien of the TGC II Mortgage securing the
                    Loans outstanding hereunder and evidenced by
                    Project Notes or Replacement Notes on such
                    date, each with respect to such Subsequent
                    TGC II Mortgage Modification and Extension
                    Agreement;

                         (C)  At the sole cost of TNP and TGC II,
                    the Title Company shall deliver to the Agent
                    a title information report, showing that good
                    and indefeasible title to the TGC II Mortgage
                    Trust Estate is vested in TGC II and that the
                    TGC II Mortgage constitutes a valid first
                    mortgage lien on the TGC II Mortgage Trust
                    Estate and showing that there are no
                    intervening liens which would adversely
                    affect the priority of the liens securing the

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 51> 

          Loans, subject only to the Permitted Liens; and

                         (D)  TNP or TGC II shall deliver to the
                    Agent such other certificates, documents or
                    other information in connection with the
                    purchases of Project Loans to be made on such
                    Designee Purchase Date as the Agent may
                    reasonably determine are necessary to effect
                    the transactions contemplated on such
                    Designee Purchase Date.

                    (h)  The Agent will keep at its principal
               office in New York, New York, or such other office
               as the Agent may designate in writing to the
               Replacement Note Holders, a register (the
               "Register") in which the Agent will provide for
               the registration of Replacement Loans and
               Replacement Notes and the registration of
               transfers of Replacement Loans and Replacement
               Notes.  In the event that any Replacement Loan or
               any Replacement Note is held by TNP or serves as
               the basis for the issuance of any outstanding
               Secured Debentures in accordance with Section 4.05
               hereof, the applicable Replacement Note Holder
               shall notify the Agent for notation in the
               Register of the Permitted Demand Date, the
               interest rate and the Post-Default Rate applicable
               to such Replacement Loan or Replacement Note.  The
               Agent may treat the Person in whose name any
               Replacement Loan or Replacement Note is registered
               in such Register as the owner thereof for the
               purpose of receiving payment of the principal of
               and the premium, if any, and interest on such
               Replacement Loan or Replacement Note and for all
               other purposes under this Agreement.  The Agent
               may rely upon the information set forth in the
               Register for any determination of the Permitted
               Demand Date, the interest rate and the Post-
               Default Rate applicable to any Replacement Loan or
               Replacement Note required under or in connection
               with this Agreement.

                    (i)  If, on or before any date on which
               TGC II is obligated to make any payment of any

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 52> 

     principal of or interest under a Replacement Note, no
     Event of Default (as defined in the Secured Debenture Indenture
     the lien of which attaches to such Replacement Note) shall have
     occurred and be continuing and TNP shall have delivered (i) if
     such Replacement Note is the First Replacement Note, to the First
     Debenture Trustee pursuant to Section 1119 of the First Secured
     Debenture Indenture and (ii) if such Replacement Note is a
     Subsequent Replacement Note, to the applicable Debenture Trustee
     pursuant to a provision in the applicable Secured Debenture
     Indenture similar to the provision referred to in subclause (i)
     of this clause (i), cash to be held as collateral security under
     the applicable Secured Debenture Indenture that is at least equal
     in amount to the payment owing on such date by TGC II under such
     Replacement Note, then TGC II shall not be required to make such
     payment under such Replacement Note; provided, that, if at any
     time and for any reason any such payment by TNP is rescinded or
     otherwise required to be restored by the applicable Debenture
     Trustee or any holder of the applicable Secured Debentures,
     whether as a result of bankruptcy or reorganization proceedings
     or otherwise, immediately upon such rescission or restoration
     being imposed or required

               (A)  an amount equal to the amount that has been
                    rescinded or is required to be restored shall
                    become immediately due and payable by TGC II
                    under such Replacement Note, and

               (B)  TGC II shall pay to such Replacement Note
                    Holder an amount equal to all reasonable
                    costs and expenses (including, without
                    limitation, attorney's fees and any interest
                    payable by the applicable Debenture Trustee
                    in connection with such rescission or
                    restoration).

               In the event that any Secured Debenture is paid in
               full by TNP and, by operation of this clause (i),
               TGC II is not obligated to make further payments
               of principal and interest under or with respect to

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 53> 

     the related Replacement Loan and Replacement Note, (x)
     the indebtedness of TGC II under this Agreement with respect to
     such Replacement Loan and Replacement Note shall not be
     discharged but shall be continued, (y) such Replacement Loan and
     Replacement Note, shall automatically, without further action by
     any Person, have the Replacement Note Maturity Date, the interest
     rate (including without limitation the Post-Default Rate) and all
     other terms and conditions contemplated by this Agreement to be
     applicable to a Subsequent Replacement Loan and a Subsequent
     Replacement Note that do not at such time serve as the basis for
     the issuance of outstanding Secured Debentures and (z) such
     Replacement Loan and Replacement Note shall be available to TNP
     and TGC II for use in conjunction with a future Section 4.05
     Closing (and in connection therewith, such Replacement Note may,
     at the option of TNP and TGC II, be replaced by a replacement
     Replacement Note in the form of Exhibit B to the First
     Amendment).   

               Notwithstanding any other provision in this
               Section 4.05 to the contrary, until the payment,
               prepayment or purchase in full of the Project
               Loans outstanding on the First Amendment Effective
               Date, all interest due and payable thereon and all
               other amounts due and payable by TNP and TGC II to
               the Banks under this Agreement (including, without
               limitation, all Supplemental Advances) and the
               other Project Documents, no Section 4.05 Closing,
               closing contemplated by Section 4.50(f) hereof or
               closing contemplated by Section 4.05(g) hereof
               shall occur unless TNP and TGC II shall each have
               delivered to the Agent such other certificates,
               documents or other information in connection
               therewith as the Agent may reasonably determine
               are necessary to effect the transactions
               contemplated thereby.".

     (k)  Add Section 4.06 of the Credit Agreement as follows:

               "SECTION 4.06.  New Project Notes.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 54>

               (i)  On and after the Bond Proceeds Payment Date,
          the Existing Loans, the New Advances and the
          Supplemental Advances made by each Bank shall be
          evidenced by a single promissory note of TGC II
          substantially in the form of Exhibit A to the First
          Amendment, dated the Bond Proceeds Payment Date,
          payable to such Bank in a principal amount equal to the
          amount of its Aggregate Commitment as originally in
          effect and otherwise duly completed.

              (ii)  The date, amount, Type, interest rate and
          duration of Interest Period (if applicable) of each
          Existing Loan, New Advance (if any) or Supplemental
          Advance (if any) made by each Bank to TGC II, and each
          payment made on account of the principal thereof, shall
          be recorded by such Bank on its books and, prior to any
          transfer of the New Project Note held by it, endorsed
          by such Bank on the schedule attached to such New
          Project Note or any continuation thereof; provided that
          the failure of such Bank to make any such recordation
          or endorsement shall not affect the obligations of TGC
          II to make a payment when due of any amount owing
          hereunder or under such New Project Note in respect of
          the Existing Loans, the New Advances (if any) or
          Supplemental Advances (if any).

             (iii)  No Bank shall be entitled to have its New
          Project Note subdivided, by exchange for promissory
          notes of lesser denominations or otherwise, except in
          connection with a sale, assignment or transfer of all
          or any portion of such Bank's Aggregate Commitment,
          Project Loans and New Project Note pursuant to
          Section 16.01 hereof.".

     (l)  Section 5.01 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following: 

               "SECTION 5.01. [INTENTIONALLY OMITTED].".

     (m)  Section 5.02 of the Credit Agreement shall be amended
          as follows: 

          (A)  in subsection (b)(i) insert, after the words
               "TGC II shall repay", the words "or TNP shall

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 55>
           purchase in accordance with the terms and conditions of
          Section 4.05 hereof,";

          (B)  in subsections (b)(i)(C) insert the word
               "Existing" before each occurrence of the term
               "Project Loan";

          (C)  delete the word "and" at the end of subsection
               (b)(i)(C) thereof;

          (D)  in subsection (b)(i)(D), substitute the word
               "each" for the word "the" before the term
               "Replacement Note" and substitute the word
               "maturing" for the word "outstanding";

          (E)  delete the preface of subsection (b)(iii) in its
               entirety and substitute in its place the
               following:

               "If all of the Project Loans under, and as defined
               in, the Unit 1 Credit Agreement have been paid,
               prepaid or purchased by TGC or TNP, then on each
               date upon which TNP receives the proceeds of any
               Permanent Financing (other than the proceeds from
               the issuance of the New Debt Securities which have
               been applied in accordance with Section 8.02(c)
               hereof and the proceeds from the issuance of the
               Second Secured Debentures, as defined in the
               Unit 1 Credit Agreement, as amended by Amendment
               No. 1 thereto, and the first mortgage bonds issued
               in connection therewith which have been applied in
               accordance with Section 2(b)(i) of the First
               Amendment), TNP or TGC II shall prepay or purchase
               the Existing Project Loans in an amount equal to
               (a) 100% (except as provided in subparagraph (C)
               hereof) of the net proceeds of such Permanent
               Financing less (b) all amounts prepaid since the
               date of the previous prepayment under this Section
               5.02(b)(iii), except to the extent such
               proceeds:";

          (F)  in subsection (b)(iii)(B)(aa) delete the
               parenthetical expression "(other than the Secured
               Debentures)" in its entirety;

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 56>

          (G)  delete subsection (b)(iii)(D) in its entirety,
               substitute a "." for the phrase "; or" at the end
               of subsection (b)(iii)(C) and insert the word "or"
               after the ";" at the end of subsection
               (b)(iii)(B);

          (H)  in subsection (g) add an "s" to the end of the
               term "Replacement Note Holder"; and

          (I)  in subsection (h) substitute the word "a" for
               "the" before the term "Replacement Loan" and
               insert after the term "Replacement Note" the
               phrase "evidencing such Replacement Loan".

     (n)  Delete Section 5.04 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 5.04.  Pro Rata Treatment.  Subject to
          Section 5.02(a) hereof, each payment or prepayment of
          principal of Existing Project Loans or Supplemental
          Advances by TNP or TGC II shall be made for account of
          the relevant Banks pro rata in accordance with the
          respective unpaid principal amounts of the Project
          Loans of such Class held by such Banks.  In the event
          that, by reason of the acceleration thereof or
          otherwise, the principal amount of any Replacement Loan
          shall become due and payable at a time when the
          principal amount of the Project Loans shall be due and
          payable, each payment of principal of Loans shall be
          made pro rata among the Secured Parties holding Loans
          according to the respective unpaid principal amounts of
          the Loans held by the Secured Parties.  Each payment of
          interest on the Loans shall be made pro rata among the
          Banks and the Replacement Note Holders according to the
          respective accrued and unpaid amounts of interest then
          due and owing to such Persons.  Any Replacement Note
          Holder or any Bank receiving a disproportionate share
          of any such payment shall, on demand by the Agent,
          return the same to the Agent, which shall pay the same
          to any Bank or any Replacement Note Holder which had
          not received its proportionate share of any such
          payment.".

     (o)  Section 5.05 of the Credit Agreement shall be amended
          as follows:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 57>

          (A)  substitute the word "each" for "the" before the
               term "Replacement Note Holder" in the first
               sentence of subsection (a) thereof; and

          (B)  delete subsection (a)(iv) in its entirety and
               substitute in its place the following:

          "(iv)     Replacement Loan and Replacement Note Rate. 
                    Subject to Section 4.05(i) hereof, if such
                    Loan is a Replacement Loan, a rate per annum
                    at all times equal to (A) the rate of
                    interest payable on the Secured Debentures
                    the proceeds of which were used to purchase
                    the Project Loans that were converted into
                    such Replacement Loan and as specified in the
                    Secured Debenture Indenture pursuant to which
                    such Secured Debentures were issued, as in
                    effect on (x) with respect to the First
                    Secured Debenture Indenture, the Extension
                    Date and (y) with respect to any Subsequent
                    Secured Debenture Indenture, the applicable
                    Section 4.05 Closing Date, as the case may
                    be, (B) the rate of interest payable on the
                    Secured Debentures, the proceeds of which
                    were used to refund the Secured Debentures to
                    which such Replacement Loan theretofore
                    related and as specified in the Subsequent
                    Secured Debenture Indenture, pursuant to
                    which such refunding Secured Debentures were
                    issued, as in effect on the applicable
                    Section 4.05 Closing Date or (C) if such
                    Replacement Loan does not serve as the basis
                    for the issuance of any outstanding Secured
                    Debentures, a rate per annum equal to the
                    Prime Rate.".

     (p)  Delete Section 5.10 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 5.10. [INTENTIONALLY OMITTED].".

     (q)  Section 6.02 of the Credit Agreement shall be amended
          as follows:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 58>

          (A)  in the last sentence of subsection (a) add an "s"
               to the end of the terms "Replacement Note" and
               "Replacement Note Holder" and insert the word
               "applicable" before the term "Replacement Note
               Holders" (as so amended);

          (B)  in the second sentence of subsection (b) add an
               "s" to the end of the term "Replacement Loan"; and

          (C)  in subsection (c) substitute the word "any" for
               "the" before both occurrences of the term
               "Replacement Note" and insert the word "related"
               before the term "Secured Debentures".

     (r)  Delete Section 6.03 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 6.03.  Sharing of Payments, Etc.  If any
          Bank or any Replacement Note Holder shall obtain any
          payment (whether voluntary, involuntary, through the
          exercise of any right of set-off, or otherwise) on
          account of the Loans made or acquired by it (other than
          pursuant to Section 7 hereof) in excess of its ratable
          share of payments on account of the Loans of any Class
          obtained by all the Banks and all the Replacement Note
          Holders holding Loans of such Class, such Bank or such
          Replacement Note Holder shall forthwith purchase from
          the other Banks and the other Replacement Note Holders
          such participations in the Loans of such Class held by
          them as shall be necessary to cause such purchasing
          Bank or such purchasing Replacement Note Holder to
          share the excess payment ratably with each of them;
          provided, that, if all or any portion of such excess
          payment is thereafter recovered from such purchasing
          Bank or such purchasing Replacement Note Holder, such
          purchase from such Bank or such Replacement Note Holder
          shall be rescinded and such Bank or such Replacement
          Note Holder shall repay to the purchasing Bank or the
          purchasing Replacement Note Holder the purchase price
          to the extent of such recovery together with an amount
          equal to such Bank's or such Replacement Note Holder's
          ratable share (according to the proportion of (a) the
          amount of such Bank's or such Replacement Note Holder's
          required repayment to (b) the total amount so recovered
          from the purchasing Bank or the Replacement Note

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 59> 

     Holder) of any interest or other amount paid or payable
     by the purchasing Bank or the purchasing Replacement Note Holder
     in respect of the total amount so recovered.  TGC II agrees that
     any Bank or Replacement Note Holder so purchasing a participation
     from another Bank or Replacement Note Holder pursuant to this
     Section 6.03 may, to the fullest extent permitted by law,
     exercise all of its rights of payment (including the right of
     set-off) with respect to such participation as fully as if such
     Bank or such Replacement Note Holder were the direct creditor of
     TGC II in the amount of such participation.".

     (s)  Section 9.11 of the Credit Agreement shall be amended
          as follows:

          (A)  inserting, immediately preceding the first
               sentence, the phrase "Prior to the First Amendment
               Effective Date,"; and

          (B)  inserting the following new sentence at the end of
               such Section:

               "TGC II shall use the proceeds of Supplemental
               Advances solely for working capital and other
               lawful purposes not prohibited by this
               Agreement.".

     (t)  Section 9.33(a) of the Credit Agreement shall be
          amended by deleting the last sentence thereof.

     (u)  Section 10.03 of the Credit Agreement shall be amended
          by deleting the reference to "Section 9.32(a)" and
          substituting in its place a reference to "Section
          4.05(b)".

     (v)  Section 10.06 of the Credit Agreement shall be amended
          by deleting the "." and substituting in its place the
          following:  

          "provided, that TGC II may advance to TNP funds
          obtained as proceeds of Project Loans.".

     (w)  Section 10.08(e) of the Credit Agreement shall be
          amended by deleting the phrase "the last sentence of

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 60> 

Section 9.33(a)" and substituting in its place "Section
     4.05".

     (x)  Delete Section 10.09 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 10.09.  TGC II shall not permit the
          aggregate principal amount of Loans outstanding
          hereunder to exceed at any time the Collateral Coverage
          Maximum Amount at such time.".

     (y)  Delete Section 10.13 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 10.13.  TNP shall not permit the
          aggregate principal amount of Loans outstanding
          hereunder to exceed at any time the Collateral Coverage
          Maximum Amount at such time.".

     (z)  Section 10.16 of the Credit Agreement shall be amended
          by (A) adding an "s" to the end of the term "Secured
          Debenture Indenture" in clause (d) thereof and (B)
          deleting the reference to "Section 9.33(a)" and
          substituting in its place a reference to "Section
          4.05(b)".

    (aa)  Delete Section 10.21(b) of the Credit Agreement in its
          entirety and substitute in its place the following:

               "(b)  TNP will provide the Banks and the
          Replacement Note Holders, as soon as available and in
          any event within 60 Business Days after each Quarterly
          Date, a certificate of an Authorized Officer of TNP
          showing, in reasonable detail, the calculation of
          Interest Coverage, Cumulative Common Dividends,
          Cumulative Net Income Available for Common, Equity
          Capital and Total Capitalization, and for the period
          from January 1, 1993 until the provisions of Section
          9.33 hereof have terminated, Available Amount
          (including the components thereof); in each case
          determined as of such Quarterly Date.".

    (bb)  Delete Section 10.22 of the Credit Agreement in its
          entirety and substitute in its place the following:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 61>

               "SECTION 10.22.  Equity Capital.  TNP will not pay
          or declare any Common Dividend if the ratio of Equity
          Capital to Total Capitalization, determined from time
          to time as of the next preceding Quarterly Date, is
          less than 20%.".

    (cc)  Delete Section 10.23 of the Credit Agreement in its
          entirety and substitute in its place the following:

               "SECTION 10.23.  Amendment or Modification of
          Secured Debenture Indentures.  Until the payment,
          prepayment or purchase in full of the Project Loans
          outstanding on the First Amendment Effective Date, all
          interest due and payable thereon and all other amounts
          due and payable by TNP and TGC II to the Banks under
          this Agreement (including, without limitation, all
          Supplemental Advances) and the other Project Documents
          and so long as any of the First Secured Debentures
          remain outstanding, without the consent of the Majority
          Banks (excluding for such purpose the Replacement Note
          Holder with respect to the affected Secured Debenture
          Indenture, or supplement thereto, referred to below),
          neither TNP nor any of its Affiliates may enter into
          any amendment, modification, supplement or waiver of a
          Secured Debenture Indenture which shall (1) shorten the
          stated maturity of the principal of, or any installment
          of interest on, any Secured Debenture then outstanding,
          or increase the principal amount thereof or the rate of
          interest thereon, (2) grant any additional collateral
          security for any Secured Debenture or (3) have the
          effect of impairing in any material respect, directly
          or indirectly, the rights or interests of the Banks or
          the Replacement Note Holders in the Collateral or under
          this Agreement or any other Project Document; provided,
          that nothing in this Section 10.23 shall prohibit (i)
          the pledge of the First Replacement Note under the
          First Secured Debenture Indenture as in effect on the
          Extension Date and (ii) securing Secured Debentures in
          accordance with Section 4.05 hereof under Subsequent
          Secured Debenture Indentures (including provisions for
          substitution of collateral) in each case as in effect
          on the applicable Section 4.05 Closing Date.".

    (dd)  Section 11 of the Credit Agreement shall be amended by
          (A) substituting the word "any" for "the" before the

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 62>
      term "Secured Debenture Indenture" in subsection (m)
     thereof and (B) substituting the word "each" for "the" before the
     term "Replacement Note Holder" in the last sentence of said
     Section.

    (ee)  Delete Section 11(n) of the Credit Agreement in its
          entirety and substitute in its place the following:

               "(n) Except in accordance with the terms and
          conditions of Section 4.05 hereof, prior to the
          payment, prepayment or purchase in full of the
          Project Loans outstanding on the First Amendment
          Effective Date, all interest due and payable
          thereon and all other amounts due and payable by
          TNP and TGC II to the Banks under this Agreement
          (including, without limitation, all Supplemental
          Advances) and the other Project Documents and so
          long as the First Secured Debentures remain
          outstanding, TNP shall have, or shall have
          permitted any of its Affiliates to, prepay,
          repay or make any other payments (except the
          payment of interest and the reimbursement of
          costs and expenses of a Secured Debenture
          Trustee or holders of Secured Debentures or
          payments pursuant to indemnification of a
          Secured Debenture Trustee) or distributions
          on account of, or the setting apart of money
          for a sinking fund or other analogous fund
          for, the purchase, redemption, refund or
          other acquisition of, any Secured Debentures,
          but excluding any payments with respect to
          interest payable thereon; provided, that, so
          long as TNP shall be complying with the
          provisions of Section 9.34 hereof in the same
          manner and at the same time that TNP is
          complying with the provisions of Section 1009
          of the First Secured Debenture Indenture (as
          in effect on the Extension Date) or any
          Subsequent Secured Debenture Indenture (in
          each case, as in effect on the applicable
          Section 4.05 Closing Date), it shall not be a
          default if TNP purchases or otherwise
          acquires First Secured Debentures or
          Subsequent Secured Debentures, as applicable,
          after the occurrence of a Change of Control
          Event pursuant to Section 1009 of the First
          Secured Debenture Indenture, or such similar
          provisions of any Subsequent Secured
          Debenture

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 63>

      Indenture pursuant to which such Subsequent Secured
     Debentures were issued.".

    (ff)  Section 12.01 of the Credit Agreement shall be amended
          by adding at the beginning of the text thereof, prior
          to the term "TGC II", the following:

          "Prior to the payment, prepayment or purchase in full
          of the Project Loans outstanding on the First Amendment
          Effective Date, all interest payable thereon and all
          other amounts due and payable by TNP and TGC II to the
          Banks under this Agreement (including, without
          limitation, all Supplemental Advances) and the other
          Project Documents,".

    (gg)  Section 12.04 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 12.04.  [INTENTIONALLY OMITTED].".

    (hh)  Section 15.01 of the Credit Agreement shall be amended
          as follows:

          (A)  in the first sentence substitute the word "each"
               for "the" before the term "Replacement Note
               Holder"; 

          (B)  in the second sentence substitute the word "any"
               for "the" before the term "Replacement Note
               Holder";

          (C)  in the third sentence delete clause (b) in its
               entirety and substitute in its place the
               following:

                    "(b) in the event that any Debenture Trustee
               shall at any time become the Agent hereunder, its
               duties and obligations in its capacity as Agent
               shall be subject to the same qualifications,
               conditions and limitations as are set forth in (i)
               with respect to the First Debenture Trustee,
               Article Six and Sections 904 and 1106 of the First
               Secured Debenture Indenture with respect to its
               duties and obligations as the First Debenture
               Trustee and (ii) with respect to any applicable

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 64> 
     Subsequent Debenture Trustee, provisions in any
     Subsequent Secured Debenture Indenture similar to the provisions
     referred to in subclause (i) of this clause (b) with respect to
     such applicable Debenture Trustee's duties and obligations as
     Debenture Trustee thereunder, and any such Debenture Trustee
     shall be under no obligation to take any action as Agent except
     under circumstances in which it would be required to take action
     in its capacity as First Debenture Trustee or Subsequent
     Debenture Trustee, as applicable."; and

          (D)  in the fourth sentence substitute the word "any"
               for "the" before the first occurrence of the term
               "Replacement Note Holder" and substitute the words
               "any other" for "the" before the second occurrence
               of such term.

    (ii)  Section 15.02 of the Credit Agreement shall be amended
          as follows:

          (A)  in the second sentence delete the phrase "the
               Replacement Note Holder" and insert in lieu
               thereof the phrase "all of the Replacement Note
               Holders"; and 

          (B)  in the third sentence (i) delete the phrase "the
               Replacement Note Holder shall not" and insert in
               lieu thereof the phrase "no Replacement Note
               Holder shall", (ii) substitute the word "such" for
               "the" before the second and third occurrences of
               the term "Replacement Note Holder" and (iii)
               insert the word "applicable" before the term
               "Secured Debentures".

    (jj)  Section 15.03 of the Credit Agreement shall be amended
          as follows:

          (A)  substitute the word "a" for "the" before the first
               occurrence of the term "Replacement Note Holder";
               and 

          (B)  delete the proviso in the last sentence in its
               entirety and substitute in its place the

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 65> 

          following:  "provided, that, unless and until the Agent
          shall have received such direction, the Agent may (but shall not
          be obligated to) take such action, or refrain from taking such
          action, with respect to such Default as it shall deem advisable
          in the best interest of the Secured Parties.".

    (kk)  Section 15.04 of the Credit Agreement shall be amended
          by substituting the word "any" for "the" before the
          term "Replacement Note Holder".

    (ll)  Section 15.05 of the Credit Agreement shall be amended
          as follows:

          (A)  substitute the word "each" for "the" before the
               first occurrence of the term "Replacement Note
               Holder"; 

          (B)  in the first proviso, delete the phrase "no Bank
               or the Replacement Note Holder" and insert in lieu
               thereof the phrase "neither any Bank nor any
               Replacement Note Holder";

          (C)  delete clauses (x) and (y) of the second proviso
               in their entirety and substitute in their place
               the following:

                    "(x) so long as any Debenture Trustee shall
               be a Replacement Note Holder (whether as the
               pledgee of a Replacement Note or as the legal and
               beneficial owner thereof following a foreclosure
               or other exercise of remedies by such Debenture
               Trustee with respect thereto), the obligations of
               such Replacement Note Holder under this Section
               15.05 shall be limited to, and solely payable out
               of, amounts paid by TNP and/or TGC II and/or the
               holders of the applicable Secured Debentures to
               such Debenture Trustee under this Agreement or any
               other Project Document that such Debenture Trustee
               shall not have theretofore applied pursuant to the
               applicable Secured Debenture Indenture for any
               purpose other than the payment of amounts owing
               under this clause (x), and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 66>

                    (y) in the case of any Replacement Note
               Holder (other than a Debenture Trustee in its
               capacity as trustee) acquiring a Replacement Note
               upon a foreclosure or other exercise of remedies
               by a Debenture Trustee with respect thereto, the
               obligations of such Replacement Note Holder under
               this Section 15.05 shall be limited to obligations
               arising from and after the date on which it shall
               have acquired such Replacement Note."; and

          (D)  in the last sentence, add an "s" to the end of the
               term "Replacement Note Holder".

    (mm)  Section 15.06 of the Credit Agreement shall be amended
          by (A) substituting the word "each" for "the" before
          the first occurrence of the term "Replacement Note
          Holder" and (B) substituting the word "such" for "the"
          before the second occurrence of such term.

    (nn)  Section 15.07 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 15.07.  Non-Reliance on Agent and Other
          Banks and Other Replacement Note Holders.  Each Bank
          and TNP, as the initial Replacement Note Holder of each
          Replacement Note, represents that it has, independently
          and without reliance on the Agent or any other Bank or
          any other Replacement Note Holder, and based on such
          documents and information as it has deemed appropriate,
          made its own appraisal of the financial condition and
          affairs of TNP and TGC II and decision to enter into
          this Agreement, and agrees that it will, independently
          and without reliance upon the Agent or any other Bank
          or any other Replacement Note Holder, and based on such
          documents and information as it shall deem appropriate
          at the time, continue to make its own appraisals and
          decisions in taking or not taking action under this
          Agreement.  Neither the Agent nor any Bank nor any
          Replacement Note Holder shall be required to keep
          informed as to the performance or observance by TNP or
          TGC II under this Agreement or any other document
          referred to or provided for herein or to make inquiry
          of, or to inspect the properties or books of, TNP or
          TGC II.  Except for notices, reports and other
          documents and information expressly required to be

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 67> 

     furnished to the Banks and the Replacement Note Holders
     by the Agent hereunder, neither the Agent nor any Bank nor any
     Replacement Note Holder shall have any duty or responsibility to
     provide any Bank or any Replacement Note Holder with any credit
     or other information concerning TNP and TGC II, or any Affiliate
     of either of them, which may come into the possession of the
     Agent or such Bank or such Replacement Note Holder or any of its
     or their affiliates.".

    (oo)  Section 15.08 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 15.08.  Resignation or Removal of Agent.
          Subject to the appointment and acceptance of a
          successor Agent as provided below, the Agent may resign
          at any time by giving notice thereof to the Banks and
          the Replacement Note Holders, TNP and TGC II, and the
          Agent may be removed at any time with or without cause
          by the Majority Banks.  Upon any such resignation or
          removal, the Majority Banks shall have the right to
          appoint a successor Agent, which Agent shall be
          reasonably acceptable to TNP and TGC II (unless an
          Event of Default has occurred and is continuing).  If
          no successor Agent shall have been appointed by the
          Majority Banks and shall have accepted such appointment
          within 30 days after the retiring Agent's giving of
          notice of resignation or the Majority Banks' removal of
          the retiring Agent, then the retiring Agent may, on
          behalf of the Banks and the Replacement Note Holders,
          appoint a successor Agent, which shall be either a bank
          with an office (or an affiliate with an office) in New
          York, New York, having a combined capital and surplus
          of not less than U.S. $500,000,000 and which shall be
          reasonably acceptable to TNP.  Upon the acceptance of
          any appointment as Agent hereunder by a successor
          Agent, such successor Agent shall thereupon succeed to
          and become vested with all the rights, powers,
          privileges and duties of the retiring Agent, and the
          retiring Agent shall be discharged from its duties and
          obligations hereunder.  After any retiring Agent's
          resignation or removal hereunder as Agent, the
          provisions of this Section 15 shall continue in effect
          for its benefit in respect of any actions taken or
          omitted to be taken by it while it was acting as Agent.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 68>  

     Notwithstanding any other provision in this Agreement
     to the contrary (i) upon the payment, prepayment or purchase in
     full of the Project Loans outstanding on the First Amendment
     Effective Date, all interest due and payable thereon and all
     other amounts due and payable by TNP and TGC II to the Banks
     under this Agreement (including, without limitation, all
     Supplemental Advances) and the other Project Documents, Chase
     shall resign as Agent hereunder at which time, the Debenture
     Trustee for the earliest maturing Secured Debentures then
     outstanding (if any), or its designee, (a "Replacement Agent")
     automatically shall be appointed as successor Agent effective
     upon the acceptance of such appointment by such Replacement Agent
     and (ii) upon the payment in full of the principal of (and
     premium, if any, on) the Secured Debentures for which a
     Replacement Agent is Debenture Trustee, all interest thereon and
     all other amounts due and payable by TNP and TGC II pursuant to
     the applicable Secured Debenture Indenture, such Replacement
     Agent shall resign as Agent hereunder at which time, the
     Debenture Trustee for the earliest maturing Secured Debentures
     then outstanding (if any), or its designee, (also a "Replacement
     Agent") automatically shall be appointed as successor Agent
     effective upon the acceptance of such appointment by such
     Replacement Agent.  Until the payment, prepayment or purchase in
     full of the Project Loans outstanding on the First Amendment
     Effective Date, all interest due and payable thereon and all
     other amounts due and payable by TNP and TGC II to the Banks
     under this Agreement (including, without limitation, all
     Supplemental Advances) and the other Project Documents, the
     Replacement Note Holders shall not be considered in the
     determination of "Majority Banks" for purposes of this Section
     15.08.  Notwithstanding any provision herein or in any Secured
     Debenture Indenture to the contrary, in the event a Debenture
     Trustee becomes Agent hereunder, it shall promptly upon the
     request of TNP and TGC II from time to time execute releases of
     liens in accordance with the Facility Purchase Agreement;
     provided, that, any such release shall contain a provision to the
     effect that such release is made in its capacity as Agent and
     Collateral Agent, if applicable, pursuant to the Facility
     Purchase Agreement

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 69> 

     but without warranty by, or recourse to, such Debenture
     Trustee either in its capacity as trustee or individually.".

    (pp)  Section 15.09 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 15.09.  Authorization.  The Agent is
          hereby authorized by the Banks (so long as any Project
          Loans are outstanding), and the Replacement Note
          Holders (each by its acceptance of the pledge of the
          applicable Replacement Note), to execute, deliver and
          perform, each of the Project Documents to which the
          Agent is or is intended to be a party and each Bank (so
          long as any Project Loans are outstanding), and each
          Replacement Note Holder (each by its acceptance of the
          pledge of the applicable Replacement Note), agrees to
          be bound by all of the agreements of the Agent
          contained in the Project Documents.".

    (qq)  Section 16.01 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 16.01.  Participation and Assignment. 
          Each Bank and each Replacement Note Holder may sell,
          assign or transfer all or any portion of its Loans or
          Notes to any other Person provided that no Bank shall
          sell, assign or transfer all or any portion of its
          Loans or Notes to Prospect.  Each Bank and each
          Replacement Note Holder shall pay to the Agent (for its
          own account) a non-refundable assignment fee of $5,000
          at the time of each permitted sale, assignment or
          transfer made by such Bank or such Replacement Note
          Holder.  If any Supplemental Advance Bank sells,
          assigns or transfers all or any portion of its Project
          Loans, the purchaser, assignee or transferee thereof
          shall assume all of the obligations (including, without
          limitation, the obligations set forth in Section 17.21
          hereof) of such Supplemental Advance Bank.  Nothing
          herein provided shall prevent any Bank or any
          Replacement Note Holder from selling at any time a
          participation in its Loans, any fees payable to it
          hereunder or any other rights hereunder (the purchaser
          of any such participation being hereinafter sometimes
          referred to as a "Participant"); provided, that,

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 70> 

     (except as provided in Section 16.02 hereof):  (a) no
     such sale or participation shall alter such Bank's or such
     Replacement Note Holder's obligations hereunder and (b) any
     agreement pursuant to which any Bank or any Replacement Note
     Holder may grant any such participation shall provide that such
     Bank or such Replacement Note Holder shall retain the sole right
     and responsibility and exercise the rights of such Bank or such
     Replacement Note Holder, and enforce the obligations of TNP or
     TGC II relating to the Loans, the fees payable hereunder and any
     other right of such Bank or such Replacement Note Holder,
     including, without limitation, the right to approve any
     amendment, modification or waiver of any provision of this
     Agreement or any other Project Document and the right to take
     action to have the Loans declared due and payable.  Except as
     provided in Section 16.02 hereof, no Participant shall have any
     rights under this Agreement or in respect of a Bank's or a
     Replacement Note Holder's Loans, fees payable to it hereunder or
     any other rights hereunder other than to receive payments in
     respect of such Participant's participation from such Bank or
     such Replacement Note Holder.  Notwithstanding the foregoing, a
     Debenture Trustee, in its capacity as pledgee of a Replacement
     Note, shall have no right to sell, assign or otherwise transfer
     any participation in, all or any portion of the Replacement Loan
     evidenced by such Replacement Note or such Replacement Note to
     any Person except TNP in accordance with the terms of the Secured
     Debenture Indenture pursuant to which such Debenture Trustee is
     acting as trustee unless a default shall have occurred and be
     continuing under such Secured Debenture Indenture.  TNP shall
     have no right to sell, assign or otherwise transfer all or any
     portion of the Replacement Loans or the Replacement Notes except
     under a Secured Debenture Indenture, provided, that such
     prohibition shall not apply to the Debenture Trustee under such
     Secured Debenture Indenture or any permitted assignee or
     transferee thereof.".

    (rr)  Section 16.02 of the Credit Agreement shall be amended
          by substituting the word "a" for "the" before the term
          "Replacement Note Holder".

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 71>

    (ss)  Section 17.03 of the Credit Agreement shall be amended
          by (A) inserting the word "a" before the first
          occurrence of the term "Replacement Note Holder", (B)
          inserting the word "applicable" before the phrase
          "instrument of adoption" and (C) deleting the term
          ""Replacement Note Holder"" and inserting in lieu
          thereof the term ""Replacement Note Holders"".

    (tt)  Section 17.04 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 17.04.  Successors and Assigns.  This
          Agreement shall be binding upon and inure to the
          benefit of TNP, TGC II, the Secured Parties and their
          respective successors and permitted assigns (including
          each Debenture Trustee, as the prospective pledgee or
          pledgee of a Replacement Note), except that neither
          TGC II nor TNP (except as contemplated in the Project
          Documents) may assign or otherwise transfer all or any
          part of its rights or obligations hereunder (other than
          its rights in respect of the Replacement Loans and the
          Replacement Notes as permitted hereunder) without the
          prior written consent of each Secured Party.  The Agent
          and each of the Banks (so long as any Project Loans are
          outstanding) consents to the pledge of the Replacement
          Notes to the applicable Debenture Trustees.".

    (uu)  Section 17.08 of the Credit Agreement shall be amended
          as follows:

          (A)  adding an "s" to the end of the terms "Replacement
               Note Maturity Date" and "Replacement Note Holder"
               in subsection (a) thereof; and 

          (B)  in the last paragraph thereof: 

               (1)  inserting "(1)" immediately after the phrase
                    "Notwithstanding the above,";

               (2)  adding an "s" to the end of both occurrences
                    of the term "Replacement Note Holder";

               (3)  in subclause (v), deleting the phrase
                    "provided that such change does not result"

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 72>

           and inserting in lieu thereof the phrase "provided
          that, if such change would result";

               (4)  at the end of subclause (v), deleting the
                    term "the Replacement Loans" and substituting
                    in lieu thereof the phrase "any Replacement
                    Loan, then the consent of the Replacement
                    Note Holder in respect of such Replacement
                    Loans shall be required"; and 

               (5)  immediately before the "." inserting the
                    following:

                    "and (2) until the payment, prepayment or
                    purchase in full of the Project Loans
                    outstanding on the First Amendment Effective
                    Date, all interest payable thereon and all
                    other amounts due and payable by TNP and TGC
                    II to the Banks under this Agreement
                    (including, without limitation, all
                    Supplemental Advances) and the other Project
                    Documents (and notwithstanding whether the
                    Total Supplemental Advance Commitments, the
                    Available Supplemental Advance Commitment or
                    the any portion of either thereof is then
                    available to TGC II hereunder) Banks holding
                    at least 66-2/3% of the outstanding principal
                    amount of the Project Loans, or the Agent
                    acting with the consent of such Banks, shall
                    have consented in writing to any amendment,
                    supplement, modification or waiver of Section
                    8 of this Agreement, or any provisions of
                    this Agreement or any other instrument,
                    document or agreement, directly or indirectly
                    referred to in or ancillary to, Section 8 of
                    this Agreement, that could have an adverse
                    effect on the interests of the Banks, the
                    value of the security provided to the Agent,
                    as agent for the Banks and the other Secured
                    Parties, under the Security Documents or the
                    ability of TNP or TGC II to perform its
                    obligations under this Agreement or any of
                    the other Project Documents".

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 73>

    (vv)  Section 17.16 of the Credit Agreement shall be amended
          by substituting the word "each" for "the" before the
          term "Replacement Note Holder".

    (ww)  Section 17.18 of the Credit Agreement shall be amended
          by (A) substituting the word "each" for "the" before
          the first occurrence of the term "Replacement Note
          Holder", (B) substituting the word "such" for "the"
          before the second and third occurrences of the term
          "Replacement Note Holder", (C) inserting the words "any
          of" before the fourth occurrence of the term "the
          Replacement Note Holder" and adding an "s" to the end
          of such occurrence of such term, (D) substituting the
          word "any" for "the" before the fifth and seventh
          occurrences of the term "Replacement Note Holder" and
          (E) adding an "s" to the end of the sixth occurrence of
          the term "Replacement Note Holder".

    (xx)  Section 17.20 of the Credit Agreement shall be
          redesignated as "SECTION 17.23", and new
          Sections 17.20, 17.21 and 17.22 shall be inserted as
          follows:

               "SECTION 17.20.  Further Releases and Consents.

               (a)  Notwithstanding any provisions to the
          contrary in this Agreement or in any other Project
          Document, each of the Secured Parties hereunder other
          than the Replacement Note Holder holding the First
          Replacement Note hereby consents and each of the future
          Replacement Note Holders (each by acceptance of the
          pledge of the applicable Replacement Note) is deemed to
          have consented to the transfer by TNP of up to six ten-
          acre tracts of real property located in the Site after
          such time as (i) there has been payment, prepayment or
          purchase in full of the Project Loans evidenced by the
          New Project Notes outstanding, all interest due and
          payable thereon and all other amounts due and payable
          by TNP and TGC II to the Banks under this Agreement and
          the other Project Documents and (ii) no First Secured
          Debentures and no Second Secured Debentures, as defined
          in the Unit 1 Credit Agreement, as amended by Amendment
          No. 1 thereto, remain outstanding.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 74>

               (b)  As a condition precedent to each transfer
          under this Section 17.20, TNP, TGC and TGC II each
          shall deliver to the Agent a certificate signed by an
          Authorized Officer of TNP, TGC or TGC II, as
          applicable, which certificate represents and warrants
          that (i) such transfer will not materially adversely
          affect TNP, TGC or TGC II's financial condition or
          ability to perform their respective obligations under
          this Agreement or any other Project Document and,
          except as contemplated by the Ten Acre Releases, has
          not and will not adversely affect the Collateral and
          (ii) the ten-acre tract(s) to be conveyed are not
          necessary to the use or operation of Unit 1 or Unit 2,
          and TNP's transfers of said ten-acre tract(s) and the
          resulting loss of access to and across and the loss of
          the use of said ten-acre tract(s) would neither
          adversely affect or interfere with the use or operation
          of Unit 1 or Unit 2 or the value of either thereof nor
          impair commercial acceptability of the security granted
          to the Secured Parties pursuant to the Security
          Documents.

               (c)  In connection with each transfer permitted by
          Section 17.20 (a) hereof and subject to the terms and
          conditions of this Section 17.20, each Secured Party
          hereby consents to the execution and delivery by the
          Agent, the Collateral Agent and, if required, the
          Mortgage Trustee, of one or more partial releases of
          liens (collectively, the "Ten Acre Releases") to effect
          the releases hereinabove described in this
          Section 17.20.

               (d)  The consents contained in this Section 17.20
          shall be effective only in the specific instances and
          for the specific purposes for which they are given and
          shall not be deemed to be a waiver of any past or a
          consent to any future action, other event or condition
          in connection with this Agreement.

               SECTION 17.21.  Supplemental Advance Sharing
          Provisions.

               (a)  If at such time as any of the events set
          forth in Section 11(e) or Section 11(f) hereof shall
          occur (a "Subject Date"), any Supplemental Advance

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 75> 

     Bank's percentage of the aggregate principal amount of
     outstanding Project Loans is less than such Supplemental Advance
     Bank's percentage of the aggregate principal amount of the
     Project Loans outstanding on the Bond Proceeds Payment Date after
     giving effect to the transactions contemplated to be effected on
     such date by this Agreement (as adjusted by virtue of sales,
     assignments and transfers of all or any portion of its Project
     Loans in accordance with Section 16.01 hereof and except for any
     amount received by such Supplemental Advance Bank in accordance
     with Section 7.01 hereof), such Supplemental Advance Bank shall
     promptly purchase from Prospect participations in (or, if and to
     the extent specified by Prospect, direct interests in) the
     Project Loans owing to Prospect in such amounts, and make such
     other adjustments from time to time as shall be equitable, to the
     end that (except for any amounts received by a Bank in accordance
     with Section 7.01 hereof) each Bank's percentage of the aggregate
     principal amount of Project Loans outstanding on such Subject
     Date shall be equal to such Bank's percentage of the aggregate
     principal amount of Project Loans outstanding on the Bond
     Proceeds Payment Date after giving effect to the transactions
     contemplated on such date (as so adjusted); provided that if any
     Supplemental Advance Bank sells, assigns or transfers all or any
     portion of its Project Loans in accordance with Section 16.01
     hereof, the purchaser, assignee or transferee of such Project
     Loans shall (unless otherwise expressed in the relevant
     instrument of sale, assignment or transfer) be subject to the
     provisions of this Section 17.21.

               (b)  TGC II and TNP agree that, notwithstanding
          the provisions of Section 16.01 hereof, any
          Supplemental Advance Bank so purchasing such a
          participation (or direct interest) may exercise all
          rights of set-off, banker's lien, counterclaim or
          similar rights with respect to such participation as
          fully as if such Supplemental Advance Bank were a
          direct holder of Project Loans owing to such
          Supplemental Advance Bank in the amount of such
          participation.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 76>

               (c)  If, under any applicable bankruptcy,
          insolvency or other similar law, any Supplemental
          Advance Bank receives a secured claim in lieu of a
          set-off to which this Section 17.21 applies, such
          Supplemental Advance Bank shall, to the extent
          practicable, exercise its rights in respect of such
          secured claim in a manner consistent with the rights of
          Prospect to share in the benefits of any recovery on
          such secured claim.

               SECTION 17.22.  New Title Insurance Policy.  On
          the Bond Proceeds Payment Date, and at the sole cost of
          TNP and TGC II, TNP and TGC II shall furnish to the
          Agent (A) a policy or policies of title insurance,
          together with evidence of the payment of all premiums
          due thereon and expenses payable in connection
          therewith and together with such reinsurance on such
          forms and in such amounts as the Banks may require, on
          forms of and issued by the Title Company, in form and
          substance satisfactory to the Banks, (x) insuring the
          Agent for the benefit of the Banks in the amount of
          $147,750,000 that good and indefeasible title to the
          Site is vested in TGC II and the TGC II Mortgage
          constitutes a valid first mortgage lien on the TGC II
          Mortgage Trust Estate subject only to Permitted Liens,
          (y) providing full coverage against all mechanics' and
          materialmen's liens and (z) providing a T-35 revolving
          credit endorsement and a T-33 adjustable mortgage loan
          endorsement and (B) a title information report in form
          and substance satisfactory to and approved by the
          Agent, showing good and indefeasible title to the TGC
          II Mortgage Trust Estate is vested in TGC II and that
          the TGC II Mortgage constitutes a valid first mortgage
          lien on the TGC II Mortgage Trust Estate subject only
          to Permitted Liens.".


     SECTION 4.02.  Supplemental Advance Facility.

     SECTION 4.02A. Conforming changes to Credit Agreement.

     (a)  Section 1.01 of the Credit Agreement shall be amended
          as follows:

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 77>

          (i)  Delete the term "Proportionate Share" and its
               definition in its entirety; and

         (ii)  Insert the following new terms and their
               definitions in the appropriate alphabetical order:

                    ""Available Supplemental Advance Commitment"
               shall mean (a) prior to the date that the Section
               3 Effective Date occurs, as of any date of
               determination after the Bond Proceeds Payment Date
               and on or before the Final Maturity Date, the sum
               of (A) the aggregate principal amount of Existing
               Project Loans prepaid pursuant to Section 5.02(a)
               hereof after the Bond Proceeds Payment Date minus
               (B) the aggregate principal amount of Supplemental
               Advances outstanding on the date of determination
               and (b) on and after the date that the Section 3
               Effective Date occurs (i) as of any date of
               determination after the First Amendment Effective
               Date and on or before the First Scheduled
               Reduction Date, the sum of (A) the aggregate
               principal amount of Existing Project Loans prepaid
               pursuant to Section 5.02(a) hereof after the Bond
               Proceeds Payment Date minus (B) the aggregate
               principal amount of Supplemental Advances
               outstanding on such date of determination and (ii)
               as of any date of determination after the First
               Scheduled Reduction Date and before the
               Supplemental Advance Commitment Termination Date,
               the sum of (A) the aggregate principal amount of
               Existing Project Loans prepaid pursuant to Section
               5.02(a) hereof after the immediately preceding
               Scheduled Reduction Date plus (B) the excess (if
               any) of (1) the applicable Carryforward Amount (if
               any) minus (2) the aggregate principal amount of
               Supplemental Advances outstanding on such date of
               determination.  Anything in the foregoing to the
               contrary notwithstanding in the event that the
               Available Supplemental Advance Commitment as
               computed in the foregoing sentence would on any
               date of determination exceed the aggregate amount
               of the Total Supplemental Advance Commitments, the
               Available Supplemental Advance Commitment shall be
               deemed to equal the aggregate amount of the Total

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 78> 

          Supplemental Advance Commitments on such date of
          determination.

                    "Carryforward Amount" shall mean (i) with
               respect to the period commencing on the First
               Scheduled Reduction Date and ending on the Second
               Scheduled Reduction Date, the excess (if any) of
               (a) Period 1 Section 5.02(a) Prepayments over (b)
               the excess (if any) of (1) $35,369,507.58 over (2)
               Period 1 Supplemental Advance Bank Purchases (the
               "First Carryforward Amount"); (ii) with respect to
               the period commencing on the Second Scheduled
               Reduction Date and ending on the Third Scheduled
               Reduction Date, the excess (if any) of (a) the sum
               of (1) the First Carryforward Amount plus (2)
               Period 2 Section 5.02(a) Prepayments over (b) the
               excess (if any) of (1) $70,739,015.16 over (2)
               Period 2 Supplemental Advance Bank Purchases (the
               "Second Carryforward Amount"); and (iii) with
               respect to the period commencing on the Third
               Scheduled Reduction Date and ending on the Final
               Maturity Date, the excess (if any) of (a) the sum
               of (1) the Second Carryforward Amount plus (2)
               Period 3 Section 5.02(a) Prepayments over (b) the
               excess (if any) of $106,108,522.74 over (3) Period
               3 Supplemental Advance Bank Purchases.

                    "Proportionate Share" shall mean, with
               respect to each Supplemental Advance Bank, the
               percentage set out under the caption
               "Proportionate Share" opposite such Supplemental
               Advance Bank's name on the signature pages of the
               First Amendment.

                    "Prospect" shall mean Prospect Street Senior
               Portfolio, L.P.

                    "Supplemental Advance Banks" shall mean (a)
               on the Bond Proceeds Payment Date, the Banks
               having Total Supplemental Advance Commitments on
               the signature pages of the First Amendment and (b)
               thereafter, the Banks from time to time holding
               Supplemental Advances and Total Supplemental
               Advance Commitments after giving effect to any

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 79>     sales, assignments or transfers thereof in accordance
              with Section 4.05(g) or 16.01 hereof.

                    "Supplemental Advance Commitment Termination
               Date" shall mean the Business Day preceding the
               Final Maturity Date.

                    "Supplemental Advances" shall have the
               meaning ascribed to such term in Section 4.02(a)
               hereof.

                    "Total Supplemental Advance Commitment" shall
               mean, for each Supplemental Advance Bank, the
               obligation of such Supplemental Advance Bank to
               make Supplemental Advances in an aggregate amount
               at any one time outstanding up to but not
               exceeding the amount set opposite the name of such
               Supplemental Advance Bank on the signature pages
               of the First Amendment under the caption "Total
               Supplemental Advance Commitment" (as the same may
               be reduced from time to time pursuant to Section
               4.02(b) hereof).  The original aggregate amount of
               the Total Supplemental Advance Commitments is
               $141,478,030.31.".

     (b)  Section 5.02(a) of the Credit Agreement shall be
          deleted in its entirety and replaced with the
          following:

               "(a) Prepayments.  (i) TGC II may, subject to
          Section 7.05 hereof and subject to the prior payment in
          full of all interest on, and principal of (i) the
          "Project Loans" under and as defined in the Unit 1
          Credit Agreement and (ii) the Supplemental Advances
          then outstanding, prepay the Existing Project Loans
          held by the Supplemental Advance Banks in whole or in
          part, without premium (except as provided in Section
          9.34 hereof) or penalty, upon at least three Business
          Days' prior notice by TGC II to the Agent in the case
          of Eurodollar Rate Loans, at least two Business Days'
          prior notice to the Agent in the case of CD Rate Loans
          and at least one Business Day's prior notice to the
          Agent in the case of Prime Rate Loans (in each case,
          each such notice to the Agent to be irrevocable),
          specifying the date and amount of such prepayment and

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 80> 

     whether the prepayment is of Eurodollar Rate Loans,
     Prime Rate Loans or CD Rate Loans or a combination thereof.  If
     such notice is given, TGC II shall make such prepayment and the
     payment amount specified in such notice shall be due and payable
     on the date specified therein.  Partial prepayments shall be in
     an aggregate principal amount of at least $1,000,000 or an
     integral multiple of $500,000 in excess thereof.  Any prepayments
     of Existing Project Loans made pursuant to this Section 5.02(a)
     shall be made pro rata among the Supplemental Advance Banks
     according to their Proportionate Share.  Upon the payment,
     prepayment or purchase in full of the Project Loans outstanding
     on the First Amendment Effective Date, all interest due and
     payable thereon and any other amounts due and payable by TNP and
     TGC II to the Banks under this Agreement (including, without
     limitation, all Supplemental Advances) and the other Project
     Documents, and subject to the terms and conditions of Section
     4.05 hereof, TNP and TGC II may prepay or otherwise reduce or
     cancel the Replacement Loans in accordance with the terms and
     conditions of the applicable Secured Debenture Indenture.".

     (c)  Section 5.02(b)(i)(B) of the Credit Agreement shall be
          deleted in its entirety and replaced with the
          following:

               "(B) on the Second Scheduled Reduction Date, an
          amount equal to the sum of (1) the excess of (x) 50% of
          the sum of (I) the aggregate outstanding principal
          amount of Project Loans (other than Supplemental
          Advances) of the Supplemental Advance Banks on such
          date plus (II) the Supplemental Advance Banks' ratable
          share (computed on the basis of Existing Project Loans
          outstanding on the Bond Proceeds Payment Date) of
          $75,750,000 plus (III) the aggregate principal amount
          of Project Loans (other than Supplemental Advances)
          prepaid after the Bond Proceeds Payment Date and before
          the Second Scheduled Reduction Date over (y) the sum of
          (I) the Supplemental Advance Banks' ratable share
          (computed on the basis of Existing Project Loans
          outstanding on the Bond Proceeds Payment Date) of
          $75,750,000 plus (II) the aggregate principal amount of
          Project Loans (other than Supplemental Advances)

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 81> 

     prepaid after the Bond Proceeds Payment Date and before
     the Second Scheduled Reduction Date plus (2) the excess of (x)
     50% of the sum of (I) the aggregate outstanding principal amount
     of Project Loans of Prospect on such date plus (II) Prospect's
     ratable share (computed on the basis of Existing Project Loans
     outstanding on the Bond Proceeds Payment Date) of $75,750,000
     plus (III) the aggregate principal amount of Prospect's Project
     Loans prepaid after the Bond Proceeds Payment Date and before the
     Second Scheduled Reduction Date over (y) the sum of (I)
     Prospect's ratable share (computed on the basis of Existing
     Project Loans outstanding on the Bond Proceeds Payment Date) of
     $75,750,000 plus (II) the aggregate principal amount of
     Prospect's Project Loans prepaid after the Bond Proceeds Payment
     Date and before the Second Scheduled Reduction Date.".


     SECTION 4.02B.  Supplemental Advances.

     (a)  Section 4.02 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 4.02.  Total Supplemental Advance
          Commitments, Available Supplemental Advance Commitment
          and Supplemental Advances.

               (a)  Supplemental Advances.  Each Supplemental
          Advance Bank severally agrees, on the terms and
          conditions of this Agreement, to make loans to TGC II
          in Dollars during the period from and including the
          Bond Proceeds Payment Date to but not including the
          Supplemental Advance Commitment Termination Date in an
          aggregate principal amount at any one time outstanding
          up to but not exceeding the amount of such Supplemental
          Advance Bank's Proportionate Share of the Available
          Supplemental Advance Commitment as in effect from time
          to time (such loans being herein called "Supplemental
          Advances"); provided that no additional Supplemental
          Advances shall be made on, and TGC II hereby agrees not
          to request any borrowings of Supplemental Advances on,
          a Scheduled Reduction Date.  Subject to the terms and
          conditions of this Agreement, during such period TGC II
          may borrow, repay and reborrow up to the amount of the
          Available Supplemental Advance Commitment by means of

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 82> 

     Prime Rate Loans, CD Rate Loans and Eurodollar Rate
     Loans and may Convert Supplemental Advances of one Type into
     Supplemental Advances of another Type (as provided in
     Section 4.04 hereof) or continue Supplemental Advances of one
     Type as Supplemental Advances of the same Type (as provided in
     Section 4.04 hereof); provided that no more than six separate
     Interest Periods in respect of CD Rate Loans and Eurodollar Rate
     Loans from each Supplemental Advance Bank may be outstanding at
     any one time.  TGC II shall give the Agent (which shall promptly
     notify the Supplemental Advance Banks) notice of each borrowing
     hereunder as provided in Section 6.01 hereof.  TGC II hereby
     agrees to repay the principal of, and to pay interest on, the
     Supplemental Advances as set forth in this Agreement.  TGC II
     hereby promises to pay to the Agent for account of each
     Supplemental Advance Bank the entire outstanding principal amount
     of such Supplemental Advance Bank's Supplemental Advances, and
     each Supplemental Advance shall mature, on the Final Maturity
     Date.  The Supplemental Advances made by each Supplemental
     Advance Bank shall be evidenced by the New Project Note of such
     Supplemental Advance Bank.

               (b)  Changes of Total Supplemental Advance
          Commitments.

               (i)  The aggregate amount of the Total
          Supplemental Advance Commitments shall be automatically
          reduced to zero on the Supplemental Advance Commitment
          Termination Date.

              (ii)  In the event that the Section 3 Effective
          Date does not occur, the aggregate amount of the Total
          Supplemental Advance Commitments shall be automatically
          reduced on the Second Scheduled Reduction Date by an
          amount equal to the amount of the prepayment referred
          to in Section 5.02(b)(i)(B)(1) and shall be
          automatically reduced to zero on the Final Maturity
          Date.

             (iii)  The aggregate amount of the Total
          Supplemental Advance Commitments shall be automatically
          reduced on each Scheduled Reduction Date set forth in
          column (A) below to the amount (subject to reduction

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 83> 

     pursuant to subclause (iii) below) set forth in column
     (B) below opposite such Scheduled Reduction Date:

                    (A)                           (B)

                                        Total Supplemental
                                        Advance Commitments
                                        Reduced to the Following
          Scheduled Reduction Date:     Amounts ($):            

          First Scheduled Reduction          
            Date                             $106,108,522.73
          Second Schedule Reduction
            Date                             $ 70,739,015.15
          Third Scheduled Reduction          
            Date                             $ 35,369,507.57
          Final Maturity Date                $     -0-

              (iv)  TGC II shall have the right at any time or
          from time to time (A) so long as no Supplemental
          Advances are outstanding, to terminate the Total
          Supplemental Advance Commitments and (B) to reduce the
          aggregate unused amount of the Total Supplemental
          Advance Commitments; provided that TGC II shall give
          notice of each such termination or reduction as
          provided in, and comply with the terms and conditions
          of, Section 6.01 hereof.

               (v)  The Total Supplemental Advance Commitments
          once terminated or reduced may not be reinstated.

               (c)  Available Supplemental Advance Commitment
          Fee.  TGC II shall pay to the Agent for account of each
          Supplemental Advance Bank a commitment fee on the daily
          average unused amount of such Supplemental Advance
          Bank's Proportionate Share of the Available
          Supplemental Advance Commitment, for the period from
          and including the Bond Proceeds Payment Date to but not
          including the earlier of the date the Total
          Supplemental Advance Commitments are terminated and the
          Supplemental Advance Commitment Termination Date, at a
          rate per annum equal to 1/4 of 1%.  Accrued commitment
          fee shall be payable on each Quarterly Date and on the
          earlier of the date the Total Supplemental Advance

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 84> 

     Commitments are terminated and the Supplemental Advance
     Commitment Termination Date.

               (d)  Prepayments of Supplemental Advances.  (i)
          TGC II may, subject to Section 7.05 hereof, prepay the
          Supplemental Advances in whole or in part, without
          premium (except as provided in Section 9.34 hereof) or
          penalty, upon at least three Business Days' prior
          notice by TGC II to the Agent in the case of Eurodollar
          Rate Loans, at least two Business Days' prior notice to
          the Agent in the case of CD Rate Loans and at least one
          Business Day's prior notice to the Agent in the case of
          Prime Rate Loans (in each case, each such notice to the
          Agent to be irrevocable), specifying the date and
          amount of such prepayment and whether the prepayment is
          of Eurodollar Rate Loans, Prime Rate Loans or CD Rate
          Loans or a combination thereof.  If such notice is
          given, TGC II shall make such prepayment and the
          payment amount specified in such notice shall be due
          and payable on the date specified therein.  Partial
          prepayments shall be in an aggregate principal amount
          of at least $1,000,000 or an integral multiple of
          $500,000 in excess thereof.  Until the Supplemental
          Advance Commitment Termination Date, from time to time
          TGC II shall prepay, or TNP shall purchase in
          accordance with the terms and conditions of Section
          4.05 hereof, the Supplemental Advances in such
          principal amounts and on such dates as shall be
          necessary so that (x) the aggregate amount outstanding
          principal amount of the Supplemental Advances shall at
          no time exceed the aggregate amount of the Total
          Supplemental Advance Commitments and (y) the aggregate
          principal amount of Loans outstanding hereunder shall
          not exceed the Collateral Coverage Maximum Amount at
          such time.".

     (b)  Section 6.01 of the Credit Agreement shall be deleted
          in its entirety and replaced with the following:

               "SECTION 6.01.  Making the Supplemental Advances.

               (a)  Each termination or reduction of the Total
          Supplemental Advance Commitments and each borrowing of
          Supplemental Advances shall be made upon notice to the
          Agent given by TGC II.  Each notice of borrowing of

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 85> 

     Supplemental Advances shall be given not later than
     11:00 a.m. (New York City time) one Business Day (with respect to
     each Prime Rate Loan), two Business Days (with respect to each CD
     Rate Loan) and three Business Days (with respect to each
     Eurodollar Rate Loan) prior to the date of the proposed borrowing
     of Supplemental Advances, and the Agent shall give to each
     Supplemental Advance Bank prompt notice thereof and of each other
     notice received from TGC II hereunder.  Each notice of
     termination or reduction of Total Supplemental Advance
     Commitments shall be given to the Agent not later than five
     Business Days prior to the proposed termination or reduction and
     such notice shall specify the amount of Total Supplemental
     Advance Commitments to be terminated or reduced (which amount
     shall be $1,000,000 or an integral multiple of $500,000 in excess
     thereof).  Each such notice of a borrowing (a "Notice of
     Borrowing") shall be in the form of Exhibit O hereto, may be
     delivered by telex, telecopy or cable, in any case confirmed
     immediately in writing, shall specify therein (i) the date of
     such borrowing, (ii) the Type of Supplemental Advances comprising
     such borrowing, (iii) the aggregate amount of such borrowing
     (which shall be $1,000,000 or an integral multiple of $500,000 in
     excess thereof), and (iv) in the case of a borrowing comprised of
     Eurodollar Rate Loans or CD Rate Loans, the initial Interest
     Period for each such Loan, and shall be otherwise duly completed. 
     In the case of a proposed borrowing comprised of Eurodollar Rate
     Loans or CD Rate Loans, the Agent shall promptly notify each
     Supplemental Advance Bank of the applicable interest rate
     pursuant to Section 5.05 hereof.  Each Supplemental Advance Bank
     shall, before 11:00 a.m. (New York City time) on the date of such
     borrowing, make available for the account of its Applicable
     Lending Office to the Agent at its Principal Office, in same day
     funds, such Supplemental Advance Bank's Proportionate Share of
     such borrowing.  After the Agent's receipt of such funds and upon
     fulfillment of the applicable conditions set forth in Sections
     8.03 and 8.04 hereof, the Agent will make such funds available to
     TGC II, by depositing the proceeds thereof, in immediately
     available funds, in the TGC II Receipt Account.  For purposes of
     determining whether the applicable conditions set forth in
     Sections 8.03

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 86> 

     and 8.04 hereof have been fulfilled, the Agent may (but
     is not obligated to) assume the truth of the statements contained
     in certificates delivered pursuant to said Section.

               (b)  Each Notice of Borrowing shall be irrevocable
          and binding on TGC II.  TGC II shall advise the Agent
          by telephone of its intention to deliver a Notice of
          Borrowing prior to the delivery thereof.

               (c)  Unless the Agent shall have received notice
          from a Supplemental Advance Bank prior to the date of
          any borrowing pursuant to Section 6.01(a) hereof that
          such Supplemental Advance Bank will not make available
          to the Agent such Supplemental Advance Bank's
          Proportionate Share of such borrowing, the Agent may
          assume that such Supplemental Advance Bank has made
          such portion available to the Agent on the date of such
          borrowing in accordance with Section 6.01(a) hereof and
          the Agent may, in reliance upon such assumption, make
          available to TGC II on such date a corresponding
          amount.  If such Supplemental Advance Bank's
          Proportionate Share of such borrowing is made available
          to the Agent on a date after the date of such
          borrowing, such Supplemental Advance Bank shall pay to
          the Agent on demand an amount equal to the product of
          (i) the daily average Federal Funds Rate during such
          period as quoted by the Agent times (ii) the amount of
          such Supplemental Advance Bank's Proportionate Share of
          such borrowing times (iii) the number of days that
          elapse from and including the date of such borrowing to
          the date on which such Supplemental Advance Bank's
          ratable portion of such borrowing shall have been made
          available to the Agent.  A certificate of the Agent
          submitted to any Supplemental Advance Bank with respect
          to any amounts owing under this Section 6.01(c) shall
          be conclusive absent manifest error.  If such
          Supplemental Advance Bank's Proportionate Share of such
          borrowing is not in fact made available to the Agent by
          such Supplemental Advance Bank within three Business
          Days after the date of such borrowing, TGC II agrees to
          pay to the Agent, on demand, an amount equal to such
          Proportionate Share of such borrowing together with
          interest thereon, for each day from the date such
          amount was made available to TGC II until the date such

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 87> 

     amount is repaid to the Agent, at the interest rate
     applicable at the time to the Loans comprising such borrowing.

               (d)  The failure of any Supplemental Advance Bank
          to make the Supplemental Advance to be made by it as
          part of any borrowing shall not relieve any other
          Supplemental Advance Bank of its obligation hereunder
          to make its Supplemental Advance on the date of such
          borrowing, but no Supplemental Advance Bank shall be
          responsible for the failure of any other Supplemental
          Advance Bank to make the Supplemental Advance to be
          made by such other Supplemental Advance Bank on the
          date of any borrowing.".

     (c)  Section 8.04 of the Credit Agreement shall be
          redesignated as "SECTION 8.05" and Section 8.03 of the
          Credit Agreement shall be deleted in its entirety and
          replaced with the following:

               "SECTION 8.03  Supplemental Advances.  The
          obligation of the Supplemental Advance Banks to make
          any Supplemental Advance to TGC II upon the occasion of
          each borrowing hereunder (including the initial
          borrowing) is subject to the conditions precedent that,
          both immediately prior to the making of such
          Supplemental Advance and also after giving effect
          thereto and to the intended use thereof:  

                    (a)  no Default shall have occurred and be
               continuing;

                    (b)  the representations and warranties made
               by TGC II and TNP in Section 2 hereof, and in each
               of the other Project Documents, shall be true and
               complete on and as of the date of the making of
               such Supplemental Advance in all material respects
               with the same force and effect as if made on and
               as of such date (or, if any such representation or
               warranty is expressly stated to have been made as
               of a specific date, as of such specific date);

                    (c)  all Government Approvals set forth in
               Schedule 1 hereto shall be in full force and
               effect or are reasonably expected to be obtained

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 88> 

          such that there will not be a material adverse effect
          on the construction or operation of the Project;

                    (d)  the amount of such borrowing shall not
               cause the aggregate principal amount of the
               Supplemental Advances outstanding to exceed the
               aggregate amount of the Available Supplemental
               Advance Commitment (before giving effect to such
               borrowing) on such date;

                    (e)  no default shall have occurred and be
               continuing under any Secured Debenture Indenture;
               and

                    (f)  the aggregate principal amount of Loans
               (including the amount of such borrowing) shall not
               exceed the Collateral Coverage Maximum Amount at
               such time.

               Each notice of borrowing by TGC II hereunder shall
          constitute a certification by TGC II to the effect set
          forth in clauses (a) through (f) above (both as of the
          date of such notice and, unless TGC II otherwise
          notifies the Agent prior to the date of such borrowing,
          as of the date of such borrowing).

               SECTION 8.04  Financial Tests for Supplemental
          Advances.  The obligation of the Supplemental Advance
          Banks to make any Supplemental Advance to TGC II upon
          the occasion of each borrowing hereunder (including the
          initial borrowing) is subject to the further conditions
          precedent that (a) Interest Coverage, as determined on
          and as of the Quarterly Date most recently falling
          prior to the date 60 Business Days prior to the date of
          borrowing, shall not be less than 1.0 and (b) the ratio
          of Equity Capital to Total Capitalization, as
          determined on and as of the Quarterly Date most
          recently falling prior to the date 60 Business Days
          prior to the date of borrowing, is greater than or
          equal to 20%.".


     SECTION 5.     Counterparts.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 89>

          This Amendment 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 Amendment by signing any such counterpart.


     SECTION 6.     Project Documents.

          Except as expressly amended hereby, the Credit
Agreement shall continue in full force and effect in accordance
with the terms and conditions thereof.  All references in any
Project Document to the Credit Agreement and any Schedule or
Exhibit thereto shall be deemed to be references to the Credit
Agreement and any Schedule or Exhibit thereto as amended.


     SECTION 7.     Joinder of Guarantor.

          Contemporaneously with the execution and delivery of
this Amendment, and as consideration therefor, TNP, as the
Guarantor, hereby confirms and consents to each and every of the
terms and conditions of this Amendment and the Credit Agreement
as amended by this Amendment (including, without limitation
Section 17.13 of the Credit Agreement), and agrees that the terms
and conditions of the Guaranty are in full force and effect and
unaffected by the execution by TGC II and TNP of this Amendment
and acknowledges that there are no claims or offsets against, or
defenses or counterclaims to, the Guaranty.


     SECTION 8.     Headings.

          The headings of the various sections of this Amendment
are for convenience of reference only, do not constitute a part
hereof and shall not be interpreted or construed to affect the
meanings or construction of any provision hereof.


     SECTION 9.     GOVERNING LAW.

          THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 90>

          IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and delivered as of the day and
year first above written.

                            TEXAS-NEW MEXICO POWER COMPANY



                            By: /s/ D. R. Barnard           
                               Title:
                                D.R. Barnard
                                Vice President
                                and Chief Financial Officer



                            TEXAS GENERATING COMPANY II



                            By: /s/ D. R. Barnard           
                               Title:
                                D. R. Barnard
                                President





           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 91>                            BANKS

Existing Loans:             ABN AMRO BANK N.V.,
$8,127,272.71                 HOUSTON AGENCY

Aggregate Commitment:
$4,427,272.72
                            
Total Supplemental Advance  By: /s/Michael A. Tribolet      
Commitment:                    Title: Vice President
$4,427,272.72
                            
Proportionate Share:        By: /s/ C. Lipchutz          
3.13%                          Title: Vice President


                            


           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 92>
Existing Loans:             BANK OF AMERICA NT & SA
$20,318,181.84

Aggregate Commitment:
$11,068,181.83              By: /s/ Mark F. Milner         
                               Title: Vice President
Total Supplemental Advance
Commitment:
$11,068,181.83
                            
Proportionate Share:
7.82%                       

<PAGE 93>

Existing Loans:             THE BANK OF NEW YORK
$35,218,181.82

Aggregate Commitment:       
$19,184,848.48              By:/s/ Michael F. Donohue, Jr.   
                               Title: Senior Vice President
Total Supplemental Advance
Commitment:                 
$19,184,848.48

Proportionate Share:
13.56%                      



           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

PAGE 94

Existing Loans:             THE BANK OF NOVA SCOTIA
$23,704,545.46

Aggregate Commitment:       
$12,912,878.79              By: /s/ A. S. Norsworthy      
                                Title: Assistant Agent
Total Supplemental Advance
Commitment:                 
$12,912,878.79

Proportionate Share:
9.13%                       


           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

PAGE 95

Existing Loans:             THE CHASE MANHATTAN BANK
$16,931,819.00                (NATIONAL ASSOCIATION)

Aggregate Commitment:
$19,223,485.29              
                            By: James T. Beal, Jr.        
Total Supplemental Advance     Title: Managing Director
Commitment:
$19,223,485.29

Proportionate Share:        
13.59%                      




  **                        Existing Loans:
$23,704,545.41

  **                        Aggregate Commitment:
$22,912,878.76              

  **                        Total Supplemental Advance
Commitment:
$22,912,878.76

  **                        Proportionate Share:       
16.20%                      






   *                        Net of participation of Christiana Bank.

  **                        Without regard to participation of Christiana 
                            Bank.  These are the amounts or 
                            definitions of "Aggregate Commitment", 
                            "Proportionate Share" and "Total Supplemental 
                            Advance Commitment" and Section Credit
                            Agreement, as amended by the First Amendment.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 96>
Existing Loans:             CREDIT SUISSE
$13,545,454.54

Aggregate Commitment:       
$7,378,787.88               By:/s/ Guy R. Cirincione        
                               Title: Member of Senior Management
Total Supplemental Advance  
Commitment:                    
$7,378,787.88

Proportionate Share:
5.22%

                            



           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

PAGE 97

Existing Loans:             FLEET BANK OF MASSACHUSETTS, N.A.
$10,159,090.92

Aggregate Commitment:       
$5,534,090.91               By: /s/ Fred M. Manning        
                               Title: Senior Vice President
Total Supplemental Advance  
Commitment:                 
$5,534,090.91

Proportionate Share:
3.91%                       




  **                        Existing Loans:
$20,318,181.84

  **                        Aggregate Commitment:
$11,068,181.82              

  **                        Total Supplemental Advance
Commitment:
$11,068,181.82

  **                        Proportionate Share:       
7.82%                       







   *                        Net of participation of The Nippon Credit Bank, Ltd.

  **                        Without regard to participation of The Nippon 
                            Credit Bank, Ltd. 
                            These are the amounts or entries referred to in the 
                            definitions of "Aggregate Commitment", 
                            "Proportionate Share" and "Total
                            Supplemental Advance Commitment" and Section 4.01 of
                            the Credit Agreement, as amended by the First 
                            Amendment.

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 98>
Existing Loans:             NATIONSBANK OF TEXAS, N.A.
$11,513,636.36

Aggregate Commitment:
$22,271,969.69              By: /s/ Vincent Liberio        
                               Title: Senior Vice President
Total Supplemental Advance
Commitment:                 
$22,271,969.69
                            
Proportionate Share:
15.74%                      



           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 99>
Existing Loans:             PROSPECT STREET SENIOR PORTFOLIO,
$11,513,636.36                L.P.

                            By:  PROSPECT STREET SENIOR LOAN
Aggregate Commitment:              CORP., as general partner
$6,271,969.69

                                 By: /s/ Preston I. Carnes, Jr. 
                                    Title: Vice President

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 100>
Existing Loans:             UNION BANK
$11,513,636.36

Aggregate Commitment:
$6,271,969.69               By: /s/ Peter R. Saggau        
                               Title: Vice President
Total Supplemental Advance
Commitment:                   
$6,271,969.69

Proportionate Share:
4.43%

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 101>


Existing Loans:             WESTPAC BANKING CORPORATION
$23,704,545.46

Aggregate Commitment:       
$12,912,878.79              By: /s/ Officer of Westpac   
                               Title: Vice President
Total Supplemental Advance
Commitment:                 
$12,912,878.79

Proportionate Share:
9.13%

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 102>
Existing Loans:             Z-LANDERBANK BANK AUSTRIA A.G.
$20,318,181.84

Aggregate Commitment:       
$11,068,181.83              By: /s/ Kevin McGinn              
                               Title: Senior Vice President
Total Supplemental Advance  
Commitment:                 
$11,068,181.83
                            By: /s/ Peter Scharf              
Proportionate Share:           Title: Assistant Vice President
7.82%

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 102>
                            THE CHASE MANHATTAN BANK
                              (NATIONAL ASSOCIATION),
                              as Agent



                            By /s/ James T. Beale, Jr.    
                              Title: Managing Director



Acknowledged and Agreed to:

THE CHASE MANHATTAN BANK,
  (NATIONAL ASSOCIATION), as
  Collateral Agent


By /s/ James T. Beale, Jr.    
  Title: Managing Director

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 104>




                            VOTING PARTICIPANT

Existing Loans:             The following Voting Participant
$6,772,726.41               consents and agrees to the foregoing
                            Amendment No. 1 to the Unit 2
Aggregate Commitment:       First Amended and Restated Project
$3,689,393.47               Loan and Credit Agreement:

Total Supplemental Advance  CHRISTIANA BANK
Commitment:
$3,689,393.47               
                            By:/s/Jahn O. Roising  Peter M. Dodge
Proportionate Share:           Title: 
2.61%                       First Vice President   Vice President

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 105>
                            
                            VOTING PARTICIPANT
                            
Existing Loans:             The following Voting Participant
$10,159,090.92              consents and agrees to the foregoing
                            Amendment No. 1 to the Unit 2
Aggregate Commitment:       First Amended and Restated Project
$5,534,090.91               Loan and Credit Agreement:

Total Supplemental Advance  THE NIPPON CREDIT BANK, LTD.
Commitment:
$5,534,090.91               
                            By:/s/ Peter Capitelli         
Proportionate Share:           Title: Vice President & Manager
3.91%

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE 106>                                                         EXHIBIT A
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                        [FORM OF NEW PROJECT NOTE]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT B
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                        [FORM OF REPLACEMENT NOTE]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT C
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                  [FORM OF INTERCREDITOR AMENDMENT NO. 2]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT D
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                    [FORM OF FOURTH TGC II MODIFICATION
                         AND EXTENSION AGREEMENT]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT E
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                    [FORM OF FIFTH TGC II MODIFICATION
                         AND EXTENSION AGREEMENT]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT F
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                  [FORM OF SUBSEQUENT TGC II MODIFICATION
                         AND EXTENSION AGREEMENT]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT G
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




           [FORM OF TNP SECOND LIEN MORTGAGE MODIFICATION NO. 2]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT H
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                   [FORM OF SECTION 4.05 LEGAL OPINION]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT I
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




            [FORMS OF SECTION 4.05 CLOSING DATE LEGAL OPINIONS]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >
                                                                EXHIBIT J
                                                    TO AMENDMENT NO. 1 TO
                                        UNIT 2 FIRST AMENDED AND RESTATED
                                        PROJECT LOAN AND CREDIT AGREEMENT




                 [FORM OF FIRST DEBENTURE TRUSTEE CONSENT]

           AMENDMENT NO. 1 TO UNIT 2 FIRST AMENDED AND RESTATED
                     PROJECT LOAN AND CREDIT AGREEMENT

<PAGE >