EXHIBIT A

                         FORM OF ___% SERIES A SENIOR NOTE 
                            AND TRUSTEE CERTIFICATION OF
                                   AUTHENTICATION


                                     $300,000,000
                          __ % Series A Senior Note due 1999

    No.                                                             $300,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ 
Dollars ($        ) on July 1, 1999.

Interest Payment Dates: January 1 and July 1, commencing January 1, 1999

Record Dates: December 15 and June 15

                              Dated: _______________ ___, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature

                                (Back of Senior Note)

                         ___% Series A Senior Note due 1999

     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series A Senior Note due 1999 (the "Senior Note") at the rate and in the 
manner specified below.

          The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each January 1 and July 1, commencing January 1, 
1999, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

          Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1 % per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the December 15 and June 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.

                                      1


     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $300 
million in aggregate.

     5.   OPTIONAL REDEMPTION.  

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

                                      2


     8.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     9.   PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     10.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding Senior Notes.  Without the consent of any Holder of a 
Senior Note, the Indenture or the Senior Notes may be amended or 
supplemented, and the Company and the Trustee may enter into Supplemental 
Indentures which shall thereafter form a part of the Indenture, to cure any 
ambiguity, defect or inconsistency, to secure the Senior Notes under 
circumstances set forth in the Indenture, to establish and create new series 
of Senior Notes, to provide that the Company shall not issue any additional 
series of Senior Notes, to add additional covenants and agreements of the 
Company to the Indenture, to provide for alterative methods or forms for 
evidencing and recording ownership of Senior Notes, to provide for the 
assumption of the Company's obligations to Holders of the Senior Notes in 
case of a merger, amalgamation, consolidation or sale of all or substantially 
all of the Company's assets, to make any change that would provide any 
additional rights or benefits to the Holders of the Senior Notes or that does 
not adversely affect the legal rights under the Indenture of any such Holder, 
or to comply with the  requirements of the SEC in order to effect or maintain 
the qualification of the Indenture under the Trust Indenture Act.

     11.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with

                                      3


any of the provisions of Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) 
failure by either the Company for 60 days after written notice by the Trustee 
or the Holders of at least 25 % or more in aggregate principal amount of the 
Senior Notes to comply with its other agreements in the Indenture or the 
Senior Notes involves non-payment of principal or interest or; (v) default 
under certain other agreements relating to Indebtedness of the Company which 
default involves non-payment of principal or interest, or results in the 
acceleration of such Indebtedness prior to its stated maturity; (vi) certain 
final judgments for the payment of money that remain undischarged for a 
period of 60 days; and (vii) certain events of bankruptcy or insolvency with 
respect to the Company or any of its Significant Subsidiaries.  If any Event 
of Default occurs and is continuing, the Trustee or the Holders of at least 
25 % in principal amount of the then outstanding Senior Notes may declare all 
the Senior Notes to be due and payable.  Notwithstanding the foregoing, in 
the case of an Event of Default arising from certain events of bankruptcy or 
insolvency, all outstanding Senior Notes will become due and payable without 
further action or notice.  Holders may not enforce the Indenture or the 
Senior Notes except as provided in the Indenture.  Subject to certain 
limitations, Holders of a majority in principal amount of the then 
outstanding Senior Notes may direct the Trustee in its exercise of any trust 
or power.  The Trustee may withhold from Holders of the Senior Notes notice 
of any continuing Default or Event of Default (except a Default or Event of 
Default relating to the payment of principal or interest) if it determines 
that withholding notice is in their interest.  The Holders of a majority in 
aggregate principal amount of the Senior Notes then outstanding by notice to 
the Trustee may on behalf of the Holders of all of the Senior Notes waive any 
existing Default or Event of Default and its consequences under the Indenture 
except a continuing Default or Event of Default in the payment of principal 
of, or interest on, the Senior Notes, except a payment default resulting from 
an acceleration that has been rescinded.  The Company is required to deliver 
to the Trustee annually a statement regarding compliance with the Indenture, 
and the Company is required upon becoming aware of any Default or Event of 
Default, to deliver to the Trustee a statement specifying such Default or 
Event of Default.

     12.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.

     13.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     14.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

                                      4


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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202               
                         Attention: Chief Financial Officer


                                  ASSIGNMENT FORM

To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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


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

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

Date:

                              Your Signature:

                  (Sign exactly as your name appears on the face of this 
                   Senior Note)

Signature Guarantee.*



* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.


                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________

Date:                              Your Signature:
                                    (Sign exactly as your name appears on 
                                     this Senior Note)

                                   Tax Identification No.:_____________________


Signature Guarantee.*


* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.


                                      EXHIBIT B

                          FORM OF __% SERIES B SENIOR NOTE 
                             AND TRUSTEE CERTIFICATION OF
                                    AUTHENTICATION

                                     $450,000,000
                          __ % Series B Senior Note due 2000

        No.                                                         $450,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ 
Dollars ($        ) on October 1, 2000.

Interest Payment Dates: April 1 and October commencing October 1, 1998

Record Dates:  March 15 and September 15 

                              Dated: ___________ __, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature



                               (Back of Senior Note)

                         ___% Series B Senior Note due 2000 

     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series B Senior Note due 2000 (the "Senior Note") at the rate and in the 
manner specified below.

          The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each April 1 and October 1, commencing October 1, 
1998, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

          Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1 % per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the March 15 and September 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.

                                      1


     4.   INDENTURE. The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $450 
million in aggregate.

     5.   OPTIONAL AND SPECIAL OPTIONAL REDEMPTION.

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

          Notwithstanding the foregoing, the Company may, at its option, by 
delivering a notice of redemption at any time during the period from April 1, 
1999 through December 31, 2000, use all or a portion of the Net Proceeds from 
any sale or sales of Fossil and Hydro Generating Assets to redeem up to 
$500,000,000 aggregate principal amount of the Notes in Series B through F at 
a cash redemption price equal to 100% of the principal amount thereof plus 
accrued and unpaid interest thereon, if any, to the date of redemption, in 
the manner and subject to the limitations set forth in the Indenture.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

                                      2


     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     9.   PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     10.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding Senior Notes.  Without the consent of any Holder of a 
Senior Note, the Indenture or the Senior Notes may be amended or 
supplemented, and the Company and the Trustee may enter into Supplemental 
Indentures which shall thereafter form a part of the Indenture, to cure any 
ambiguity, defect or inconsistency, to secure the Senior Notes under 
circumstances set forth in the Indenture, to establish and create new series 
of Senior Notes, to provide that the Company shall not issue any additional 
series of Senior Notes, to add additional covenants and agreements of the 
Company to the Indenture, to provide for alternative methods or forms for 
evidencing and

                                      3


recording ownership of Senior Notes, to provide for the assumption of the 
Company's obligations to Holders of the Senior Notes in case of a merger, 
amalgamation, consolidation or sale of all or substantially all of the 
Company's assets, to make any change that would provide any additional rights 
or benefits to the Holders of the Senior Notes or that does not adversely 
affect the legal rights under the Indenture of any such Holder, or to comply 
with the  requirements of the SEC in order to effect or maintain the 
qualification of the Indenture under the Trust Indenture Act.

     11.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; (v) 
default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount of the then outstanding 
Senior Notes may declare all the Senior Notes to be due and payable. 
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency, all outstanding Senior Notes 
will become due and payable without further action or notice.  Holders may 
not enforce the Indenture or the Senior Notes except as provided in the 
Indenture. Subject to certain limitations, Holders of a majority in principal 
amount of the then outstanding Senior Notes may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Senior Notes notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the Company is 
required upon becoming aware of any Default or Event of Default, to deliver 
to the Trustee a statement specifying such Default or Event of Default.

     12.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or any
other capacity, may make loans to, accept deposits from, and perform services
for the Company or its Affiliates, and may otherwise deal with the Company or
its Affiliates, as if it were not the Trustee.

                                      4


     13.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     14.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202               
                         Attention: Chief Financial Officer

                                      5

                                  ASSIGNMENT FORM

To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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


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

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

Date:

                              Your Signature:
                  (Sign exactly as your name appears on the face of 
                  this Senior Note)

Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.



                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________

Date:                              Your Signature:
                                      (Sign exactly as your name appears on 
                                      this Senior Note)

                                   Tax Identification No.:_____________________


Signature Guarantee.*


* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.


                                     EXHIBIT C

                         FORM OF ___% SERIES C SENIOR NOTE 
                            AND TRUSTEE CERTIFICATION OF
                                   AUTHENTICATION


                                     $400,000,000
                          __ % Series C Senior Note due 2001

No.                                                              $400,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ 
Dollars ($        ) on July 1, 2001.

Interest Payment Dates: January 1 and July 1, commencing January 1, 1999

Record Dates: December 15 and June 15

                              Dated: __________ __, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature

                               (Back of Senior Note)

                         ___% Series C Senior Note due 2001

     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series C Senior Note due 2001 (the "Senior Note") at the rate and in the 
manner specified below.

          The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each January 1 and July 1, commencing January, 
1999, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

          Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1 % per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the December 15 and June 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.

                                      1


     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $400 
million in aggregate.

     5.   OPTIONAL AND SPECIAL OPTIONAL REDEMPTION.

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

          Notwithstanding the foregoing, the Company may, at its option, by 
delivering a notice of redemption at any time during the period from April 1, 
1999 through December 31, 2000, use all or a portion of the Net Proceeds from 
any sale or sales of Fossil and Hydro Generating Assets to redeem up to 
$500,000,000 aggregate principal amount of the Notes in Series B through F at 
a cash redemption price equal to 100% of the principal amount thereof plus 
accrued and unpaid interest thereon, if any, to the date of redemption, in 
the manner and subject to the limitations set forth in the Indenture.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

                                      2


     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.   NOTICE OF REDEMPTION.  Notice of redemption will be mailed at least 
30 days but not more than 60 days before the redemption date to each Holder 
whose Senior Notes are to be redeemed at his registered address.  Senior 
Notes in denominations larger than $1,000 may be redeemed in part but only in 
whole multiples of $1,000, unless all of the Senior Notes held by a Holder 
are to be redeemed.  On and after the redemption date interest ceases to 
accrue on Senior Notes or portions thereof called for redemption.

     9.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     10.  PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     11.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding

                                      3


Senior Notes.  Without the consent of any Holder of a Senior Note, the 
Indenture or the Senior Notes may be amended or supplemented, and the Company 
and the Trustee may enter into Supplemental Indentures which shall thereafter 
form a part of the Indenture, to cure any ambiguity, defect or inconsistency, 
to secure the Senior Notes under circumstances set forth in the Indenture, to 
establish and create new series of Senior Notes, to provide that the Company 
shall not issue any additional series of Senior Notes, to add additional 
covenants and agreements of the Company to the Indenture, to provide for 
alterative methods or forms for evidencing and recording ownership of Senior 
Notes, to provide for the assumption of the Company's obligations to Holders 
of the Senior Notes in case of a merger, amalgamation, consolidation or sale 
of all or substantially all of the Company's assets, to make any change that 
would provide any additional rights or benefits to the Holders of the Senior 
Notes or that does not adversely affect the legal rights under the Indenture 
of any such Holder, or to comply with the  requirements of the SEC in order 
to effect or maintain the qualification of the Indenture under the Trust 
Indenture Act.

     12.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; (v) 
default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount of the then outstanding 
Senior Notes may declare all the Senior Notes to be due and payable. 
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency, all outstanding Senior Notes 
will become due and payable without further action or notice.  Holders may 
not enforce the Indenture or the Senior Notes except as provided in the 
Indenture. Subject to certain limitations, Holders of a majority in principal 
amount of the then outstanding Senior Notes may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Senior Notes notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the

                                      4


Company is required upon becoming aware of any Default or Event of Default, 
to deliver to the Trustee a statement specifying such Default or Event of 
Default.

     13.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.

     14.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     15.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202               
                         Attention: Chief Financial Officer


                                      5

                                  ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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








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

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

Date:

                              Your Signature:
                  (Sign exactly as your name appears on the face of 
                  this Senior Note)

Signature Guarantee.*


* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.

                                      

                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________

Date:                         Your Signature:
                                 (Sign exactly as your name appears on this 
                                 Senior Note)

                              Tax Identification 
                              No.:________________________


Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.

                                      

                                     EXHIBIT D

                        FORM OF ____% SERIES D SENIOR NOTE 
                            AND TRUSTEE CERTIFICATION OF
                                   AUTHENTICATION


                                      

                                     $400,000,000
                          __ % Series D Senior Note due 2002

No.                                                              $400,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ 
Dollars ($        ) on October 1, 2002.

Interest Payment Dates: April 1 and October 1, commencing October 1, 1998

Record Dates: March 15 and September 15

                              Dated: ____________ ___, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature

                                      

                               (Back of Senior Note)

                         ___% Series D Senior Note due 2002

     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series D Senior Note due 2002 (the "Senior Note") at the rate and in the 
manner specified below.

          The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each April 1 and October 1, commencing October 1, 
1998, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

          Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1 % per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the March 15 and September 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.

                                      1


     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $400 
million in aggregate.

     5.   OPTIONAL AND SPECIAL OPTIONAL REDEMPTION.

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

          Notwithstanding the foregoing, the Company may, at its option, by 
delivering a notice of redemption at any time during the period from April 1, 
1999 through December 31, 2000, use all or a portion of the Net Proceeds from 
any sale or sales of Fossil and Hydro Generating Assets to redeem up to 
$500,000,000 aggregate principal amount of the Notes in Series B through F at 
a cash redemption price equal to 100% of the principal amount thereof plus 
accrued and unpaid interest thereon, if any, to the date of redemption, in 
the manner and subject to the limitations set forth in the Indenture.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

                                      2


     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.   NOTICE OF REDEMPTION.  Notice of redemption will be mailed at least 
30 days but not more than 60 days before the redemption date to each Holder 
whose Senior Notes are to be redeemed at his registered address.  Senior 
Notes in denominations larger than $1,000 may be redeemed in part but only in 
whole multiples of $1,000, unless all of the Senior Notes held by a Holder 
are to be redeemed.  On and after the redemption date interest ceases to 
accrue on Senior Notes or portions thereof called for redemption.

     9.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     10.  PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     11.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding

                                      3


Senior Notes.  Without the consent of any Holder of a Senior Note, the 
Indenture or the Senior Notes may be amended or supplemented, and the Company 
and the Trustee may enter into Supplemental Indentures which shall thereafter 
form a part of the Indenture, to cure any ambiguity, defect or inconsistency, 
to secure the Senior Notes under circumstances set forth in the Indenture, to 
establish and create new series of Senior Notes, to provide that the Company 
shall not issue any additional series of Senior Notes, to add additional 
covenants and agreements of the Company to the Indenture, to provide for 
alterative methods or forms for evidencing and recording ownership of Senior 
Notes, to provide for the assumption of the Company's obligations to Holders 
of the Senior Notes in case of a merger, amalgamation, consolidation or sale 
of all or substantially all of the Company's assets, to make any change that 
would provide any additional rights or benefits to the Holders of the Senior 
Notes or that does not adversely affect the legal rights under the Indenture 
of any such Holder, or to comply with the  requirements of the SEC in order 
to effect or maintain the qualification of the Indenture under the Trust 
Indenture Act.

     12.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; (v) 
default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount of the then outstanding 
Senior Notes may declare all the Senior Notes to be due and payable. 
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency, all outstanding Senior Notes 
will become due and payable without further action or notice.  Holders may 
not enforce the Indenture or the Senior Notes except as provided in the 
Indenture. Subject to certain limitations, Holders of a majority in principal 
amount of the then outstanding Senior Notes may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Senior Notes notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the

                                      4


Company is required upon becoming aware of any Default or Event of Default, 
to deliver to the Trustee a statement specifying such Default or Event of 
Default.

     13.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.

     14.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     15.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202               
                         Attention: Chief Financial Officer


                                      5

                                  ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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



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

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

Date:

                              Your Signature:
                  (Sign exactly as your name appears on the face of this 
                  Senior Note)

Signature Guarantee.*



* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.

                                      


                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________

Date:                              Your Signature:
                                     (Sign exactly as your name appears on this 
                                     Senior Note)

                                   Tax Identification 
                                   No.:________________________


Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.


                                      

                                      EXHIBIT E

                         FORM OF ___% SERIES E SENIOR NOTE 
                            AND TRUSTEE CERTIFICATION OF
                                   AUTHENTICATION

                                      


                                     $400,000,000
                          __ % Series E Senior Note due 2003

No.                                                              $400,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ 
Dollars ($        ) on July 1, 2003.

Interest Payment Dates: January 1 and July 1, commencing January 1, 1999

Record Dates: December 15 and June 15

                              Dated: _______________ ___, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature

                                      

                               (Back of Senior Note)

                         ___% Series E Senior Note due 2003

     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series E Senior Note due 2003 (the "Senior Note") at the rate and in the 
manner specified below.

          The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each January 1 and July 1, commencing January 1, 
1999, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

          Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1% per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the December 15 and June 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.

                                      1


     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $400 
million in aggregate.

     5.   OPTIONAL AND SPECIAL OPTIONAL REDEMPTION.

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

          Notwithstanding the foregoing, the Company may, at its option, by 
delivering a notice of redemption at any time during the period from April 1, 
1999 through December 31, 2000, use all or a portion of the Net Proceeds from 
any sale or sales of Fossil and Hydro Generating Assets to redeem up to 
$500,000,000 aggregate principal amount of the Notes in Series B through F at 
a cash redemption price equal to 100% of the principal amount thereof plus 
accrued and unpaid interest thereon, if any, to the date of redemption, in 
the manner and subject to the limitations set forth in the Indenture.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

                                      2


     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     9.   PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     10.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding Senior Notes.  Without the consent of any Holder of a 
Senior Note, the Indenture or the Senior Notes may be amended or 
supplemented, and the Company and the Trustee may enter into Supplemental 
Indentures which shall thereafter form a part of the Indenture, to cure any 
ambiguity, defect or inconsistency, to secure the Senior Notes under 
circumstances set forth in the Indenture, to establish and create new series 
of Senior Notes, to provide that the Company shall not issue any additional 
series of Senior Notes, to add additional covenants and agreements of the 
Company to the Indenture, to provide for alterative methods or forms for 
evidencing and 

                                      3


recording ownership of Senior Notes, to provide for the assumption of the 
Company's obligations to Holders of the Senior Notes in case of a merger, 
amalgamation, consolidation or sale of all or substantially all of the 
Company's assets, to make any change that would provide any additional rights 
or benefits to the Holders of the Senior Notes or that does not adversely 
affect the legal rights under the Indenture of any such Holder, or to comply 
with the  requirements of the SEC in order to effect or maintain the 
qualification of the Indenture under the Trust Indenture Act.

     11.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes 
involves non-payment of principal or interest or; (v) default under certain 
other agreements relating to Indebtedness of the Company which default 
involves non-payment of principal or interest, or results in the acceleration 
of such Indebtedness prior to its stated maturity; (vi) certain final 
judgments for the payment of money that remain undischarged for a period of 
60 days; and (vii) certain events of bankruptcy or insolvency with respect to 
the Company or any of its Significant Subsidiaries.  If any Event of Default 
occurs and is continuing, the Trustee or the Holders of at least 25 % in 
principal amount of the then outstanding Senior Notes may declare all the 
Senior Notes to be due and payable.  Notwithstanding the foregoing, in the 
case of an Event of Default arising from certain events of bankruptcy or 
insolvency, all outstanding Senior Notes will become due and payable without 
further action or notice.  Holders may not enforce the Indenture or the 
Senior Notes except as provided in the Indenture.  Subject to certain 
limitations, Holders of a majority in principal amount of the then 
outstanding Senior Notes may direct the Trustee in its exercise of any trust 
or power.  The Trustee may withhold from Holders of the Senior Notes notice 
of any continuing Default or Event of Default (except a Default or Event of 
Default relating to the payment of principal or interest) if it determines 
that withholding notice is in their interest.  The Holders of a majority in 
aggregate principal amount of the Senior Notes then outstanding by notice to 
the Trustee may on behalf of the Holders of all of the Senior Notes waive any 
existing Default or Event of Default and its consequences under the Indenture 
except a continuing Default or Event of Default in the payment of principal 
of, or interest on, the Senior Notes, except a payment default resulting from 
an acceleration that has been rescinded.  The Company is required to deliver 
to the Trustee annually a statement regarding compliance with the Indenture, 
and the Company is required upon becoming aware of any Default or Event of 
Default, to deliver to the Trustee a statement specifying such Default or 
Event of Default.

     12.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.


                                       4



     13.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     14.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                      Niagara Mohawk Power Corporation
                      300 Erie Boulevard West
                      Syracuse, New York  13202
                      Attention: Chief Financial Officer


                                       5



                                ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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








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

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



Date:

                                Your Signature:
             (Sign exactly as your name appears on the face of this Senior Note)

Signature Guarantee.*




* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.



                      OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

           / /  Section 4.10        / /  Section 4.14

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________



Date:

                           Your Signature:
                         (Sign exactly as your name appears on this Senior Note)

                                Tax Identification
                                No.:________________________



Signature Guarantee.*




* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.



                                   EXHIBIT F

                       FORM OF __% SERIES F SENIOR NOTE
                         AND TRUSTEE CERTIFICATION OF
                                AUTHENTICATION



                                 $400,000,000
                      __ % Series F Senior Note due 2005

No.                                                                 $400,000,000


                       NIAGARA MOHAWK POWER CORPORATION


promises to pay to

or their registered assigns, the principal sum of ______________________ Dollars
($        ) on October 1, 2005.

Interest Payment Dates: April 1 and October 1, commencing October 1, 1998

Record Dates:  March 15 and September 15

                                       Dated: ___________ __, 1998

                                       NIAGARA MOHAWK POWER CORPORATION


                                       By:_____________________________
                                          Name:
                                          Title:


                                       By:_____________________________
                                          Name:
                                          Title:


This is one of the Senior Notes referred
to in the within-mentioned Indenture:

IBJ SCHRODER BANK &
TRUST COMPANY, as Trustee


By:_____________________________
   Authorized Signature



                             (Back of Senior Note)

                      ___% Series F Senior Note due 2005


     Capitalized terms used herein shall have the meanings assigned to them 
in the Indenture referred to below unless otherwise indicated.

     1.  INTEREST.  Niagara Mohawk Power Corporation, a New York corporation 
(the "Company") promises to pay interest on the principal amount of this ___% 
Series F Senior Note due 2005 (the "Senior Note") at the rate and in the 
manner specified below.

         The Company shall pay interest on the principal amount of this 
Senior Note in cash at the rate per annum shown above.  The Company shall pay 
interest semi-annually on each April 1 and October 1, commencing October 1, 
1998, or if any such day is not a Business Day (as defined in the Indenture 
referred to below), on the next succeeding Business Day (each an "Interest 
Payment Date").

         Interest will be computed on the basis of a 360-day year consisting 
of twelve 30-day months for the actual number of days elapsed.  Interest 
shall accrue from the most recent date to which interest has been paid or, if 
no interest has been paid, from the date of the original issuance of this 
Senior Note.  To the extent lawful, the Company shall pay interest on overdue 
principal and premium at the rate of 1 % per annum in excess of the then 
applicable interest rate on this Senior Note; it shall pay interest on 
overdue installments of interest (without regard to any applicable grace 
periods) at the same rate to the extent lawful.  The rates of interest 
specified in the Indenture and this Senior Note are nominal rates and all 
interest payments and computations are to be made without allowance or 
deduction for deemed reinvestment of interest.

     2.  METHOD OF PAYMENT.  The Company will pay interest on the Senior 
Notes to the Persons who are registered Holders of Senior Notes at the close 
of business on the March 15 and September 15 next preceding the Interest 
Payment Date, even if such Senior Notes are cancelled after such record date 
and on or before such Interest Payment Date.  The Senior Notes will be 
payable as to principal, premium, if any, and interest at the office or 
agency of the Company maintained for such purpose within or without the City 
and State of New York, or, at the option of the Company, payment of interest 
may be made by check mailed to the Holders at their addresses set forth in 
the register of Holders. Such payment shall be in such payment of public and 
private debts coin or currency of the United States of America as at the time 
of payment is legal tender for payment of public and private debts.

     3.  PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as 
Paying Agent and Registrar.  The Company may change any Paying Agent or 
Registrar or co-registrar without prior notice to any Holder.  The Company 
may act in any such capacity.


                                       1



     4.  INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to 
$400 million in aggregate.

     5.  OPTIONAL AND SPECIAL OPTIONAL REDEMPTION.

         The Senior Notes are redeemable by the Company at any time, in whole 
or in part, upon not less than 30 nor more than 60 days' prior notice, in 
cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

         Notwithstanding the foregoing, the Company may, at its option, by 
delivering a notice of redemption at any time during the period from April 1, 
1999 through December 31, 2000, use all or a portion of the Net Proceeds from 
any sale or sales of Fossil and Hydro Generating Assets to redeem up to 
$500,000,000 aggregate principal amount of the Notes in Series B through F at 
a cash redemption price equal to 100% of the principal amount thereof plus 
accrued and unpaid interest thereon, if any, to the date of redemption, in 
the manner and subject to the limitations set forth in the Indenture.

     6.  MANDATORY REDEMPTION.

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.  CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.

     (a) If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.


                                       2



     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.  DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     9.  PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     10. AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding Senior Notes.  Without the consent of any Holder of a 
Senior Note, the Indenture or the Senior Notes may be amended or 
supplemented, and the Company and the Trustee may enter into Supplemental 
Indentures which shall thereafter form a part of the Indenture, to cure any 
ambiguity, defect or inconsistency, to secure the Senior Notes under 
circumstances set forth in the Indenture, to establish and create new series 
of Senior Notes, to provide that the Company shall not issue any additional 
series of Senior Notes, to add additional covenants and agreements of the 
Company to the Indenture, to provide for alternative methods or forms for 
evidencing and 


                                       3



recording ownership of Senior Notes, to provide for the assumption of the 
Company's obligations to Holders of the Senior Notes in case of a merger, 
amalgamation, consolidation or sale of all or substantially all of the 
Company's assets, to make any change that would provide any additional rights 
or benefits to the Holders of the Senior Notes or that does not adversely 
affect the legal rights under the Indenture of any such Holder, or to comply 
with the  requirements of the SEC in order to effect or maintain the 
qualification of the Indenture under the Trust Indenture Act.

     11.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; 
(v) default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount of the then outstanding 
Senior Notes may declare all the Senior Notes to be due and payable. 
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency, all outstanding Senior Notes 
will become due and payable without further action or notice.  Holders may 
not enforce the Indenture or the Senior Notes except as provided in the 
Indenture. Subject to certain limitations, Holders of a majority in principal 
amount of the then outstanding Senior Notes may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Senior Notes notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the Company is 
required upon becoming aware of any Default or Event of Default, to deliver 
to the Trustee a statement specifying such Default or Event of Default.

     12.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.


                                       4



     13.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     14.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                      Niagara Mohawk Power Corporation
                      300 Erie Boulevard West
                      Syracuse, New York  13202
                      Attention: Chief Financial Officer


                                       5



                                ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and 
transfer this Senior Note to

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








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

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



Date:

                                Your Signature:
             (Sign exactly as your name appears on the face of this Senior Note)

Signature Guarantee.*




* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.



                      OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company 
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

           / /  Section 4.10        / /  Section 4.14

     If you want to elect to have only part of the Senior Note purchased by 
the Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state 
the amount you elect to have purchased: $___________



Date:

                           Your Signature:
                         (Sign exactly as your name appears on this Senior Note)

                                Tax Identification
                                No.:________________________



Signature Guarantee.*




* Your signature must be guaranteed by a commercial bank or trust company 
located, or having a correspondent located, in the City of New York or the 
city where the principal office of the registrar is located or by a member of 
a national securities exchange.



                                   EXHIBIT G

                       FORM OF ___% SERIES G SENIOR NOTE
                         AND TRUSTEE CERTIFICATION OF
                                AUTHENTICATION



                                 $600,000,000
                      __ % Series G Senior Note due 2008


No.                                                                 $600,000,000


                       NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ Dollars
($        ) on October 1, 2008.

Interest Payment Dates: April 1 and October 1, commencing October 1, 1998

Record Dates: March 15 and September 15

                                       Dated: ___________ __, 1998

                                       NIAGARA MOHAWK POWER CORPORATION


                                       By:_____________________________
                                          Name:
                                          Title:


                                       By:_____________________________
                                          Name:
                                          Title:


This is one of the Senior Notes referred
to in the within-mentioned Indenture:

IBJ SCHRODER BANK &
TRUST COMPANY, as Trustee


By:_____________________________
   Authorized Signature



                               (Back of Senior Note)

                         ___% Series G Senior Note due 2008

     Capitalized terms used herein shall have the meanings assigned to them in
the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation
(the "Company") promises to pay interest on the principal amount of this ___%
Series G Senior Note due 2008 (the "Senior Note") at the rate and in the manner
specified below.

          The Company shall pay interest on the principal amount of this Senior
Note in cash at the rate per annum shown above.  The Company shall pay interest
semi-annually on each April 1 and October 1, commencing October 1, 1998, or if
any such day is not a Business Day (as defined in the Indenture referred to
below), on the next succeeding Business Day (each an "Interest Payment Date").

          Interest will be computed on the basis of a 360-day year consisting of
twelve 30-day months for the actual number of days elapsed.  Interest shall
accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from the date of the original issuance of this Senior
Note.  To the extent lawful, the Company shall pay interest on overdue principal
and premium at the rate of 1 % per annum in excess of the then applicable
interest rate on this Senior Note; it shall pay interest on overdue installments
of interest (without regard to any applicable grace periods) at the same rate to
the extent lawful.  The rates of interest specified in the Indenture and this
Senior Note are nominal rates and all interest payments and computations are to
be made without allowance or deduction for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior Notes
to the Persons who are registered Holders of Senior Notes at the close of
business on the March 15 and September 15 next preceding the Interest Payment
Date, even if such Senior Notes are cancelled after such record date and on or
before such Interest Payment Date.  The Senior Notes will be payable as to
principal, premium, if any, and interest at the office or agency of the Company
maintained for such purpose within or without the City and State of New York,
or, at the option of the Company, payment of interest may be made by check
mailed to the Holders at their addresses set forth in the register of Holders. 
Such payment shall be in such payment of public and private debts coin or
currency of the United States of America as at the time of payment is legal
tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as Paying
Agent and Registrar.  The Company may change any Paying Agent or Registrar or
co-registrar without prior notice to any Holder.  The Company may act in any
such capacity.

                                      1



     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture 
dated as of June 30, 1998 (the "Indenture") between the Company and the 
Trustee. The terms of the Senior Notes include those stated in the Indenture 
and those made part of the Indenture by reference to the Trust Indenture Act 
of 1939, as amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes 
are subject to all such terms, and Holders are referred to the Indenture and 
such Act for a statement of such terms.  The terms of the Indenture shall 
govern any inconsistencies between the Indenture and the Senior Notes.  The 
Senior Notes are senior unsecured obligations of the Company limited to $600 
million in aggregate.

     5.   OPTIONAL REDEMPTION.

          The Senior Notes are redeemable by the Company at any time, in 
whole or in part, upon not less than 30 nor more than 60 days' prior notice, 
in cash at a redemption price equal to 100% of the principal amount thereof, 
plus accrued and unpaid interest thereon through the redemption date plus the 
Make-Whole Premium.

     6.   MANDATORY REDEMPTION.  

     Except as set forth in paragraph 7 below, the Company is not required to 
make mandatory repurchase, redemption or sinking fund payments with respect 
to the Senior Notes.

     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
101% of the aggregate principal amount thereof plus accrued and unpaid 
interest thereon the date of purchase.  Within 30 days following any Change 
of Control Triggering Event, the Company will mail a notice to each Holder 
setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to 100% of 
the principal amount thereof plus accrued and unpaid interest thereon to the 
date of purchase.

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

                                      2



     8.   NOTICE OF REDEMPTION.  Notice of redemption will be mailed at least 
30 days but not more than 60 days before the redemption date to each Holder 
whose Senior Notes are to be redeemed at his registered address.  Senior 
Notes in denominations larger than $1,000 may be redeemed in part but only in 
whole multiples of $1,000, unless all of the Senior Notes held by a Holder 
are to be redeemed.  On and after the redemption date interest ceases to 
accrue on Senior Notes or portions thereof called for redemption.

     9.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     10.  PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior Note and for all other purposes whatsoever, whether or not this Senior 
Note is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     11.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount of the then 
outstanding Senior Notes (including, without limitation, consents obtained in 
connection with a purchase of, or tender offer or exchange offer for, Senior 
Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, any existing 
Default or Event of Default (other than a Default or Event of Default in the 
payment of the principal of, or interest on, the Senior Notes, except a 
payment default resulting from an acceleration that has been rescinded) or 
compliance with any provision of the Indenture or the Senior Notes may be 
waived with the consent of the Holders of a majority in principal amount of 
the then outstanding Senior Notes.  Without the consent of any Holder of a 
Senior Note, the Indenture or the Senior Notes may be amended or 
supplemented, and the Company and the Trustee may enter into Supplemental 
Indentures which shall thereafter form a part of the Indenture, to cure any 
ambiguity, defect or inconsistency, to secure the Senior Notes under 
circumstances set forth in the Indenture, to establish and create new series 
of Senior Notes, to provide that the Company shall not issue any additional 
series of Senior Notes, to add additional covenants and agreements of the 
Company to the Indenture, to provide for alterative methods or forms for 
evidencing and recording ownership of Senior Notes, to provide for the 
assumption of the Company's obligations to Holders of the Senior Notes in 
case of a merger, amalgamation, consolidation or sale of all or substantially 
all of the Company's assets, to make any change that would provide any 
additional 

                                      3



rights or benefits to the Holders of the Senior Notes or that does not 
adversely affect the legal rights under the Indenture of any such Holder, or 
to comply with the  requirements of the SEC in order to effect or maintain 
the qualification of the Indenture under the Trust Indenture Act.

     12.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; (v) 
default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount of the then outstanding 
Senior Notes may declare all the Senior Notes to be due and payable. 
Notwithstanding the foregoing, in the case of an Event of Default arising 
from certain events of bankruptcy or insolvency, all outstanding Senior Notes 
will become due and payable without further action or notice.  Holders may 
not enforce the Indenture or the Senior Notes except as provided in the 
Indenture. Subject to certain limitations, Holders of a majority in principal 
amount of the then outstanding Senior Notes may direct the Trustee in its 
exercise of any trust or power.  The Trustee may withhold from Holders of the 
Senior Notes notice of any continuing Default or Event of Default (except a 
Default or Event of Default relating to the payment of principal or interest) 
if it determines that withholding notice is in their interest.  The Holders 
of a majority in aggregate principal amount of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the Company is 
required upon becoming aware of any Default or Event of Default, to deliver 
to the Trustee a statement specifying such Default or Event of Default.

     13.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.

     14.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by 

                                      4



reason of, such obligations or their creation.  Each Holder by accepting a 
Senior Note waives and releases all such liability.  The waiver and release 
are part of the consideration for the issuance of the Senior Notes.

     15.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202
                         Attention: Chief Financial Officer

                                      5



                                  ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and
transfer this Senior Note to

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








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

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



Date:

                              Your Signature:
             (Sign exactly as your name appears on the face of this Senior Note)

Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company
located, or having a correspondent located, in the City of New York or the city
where the principal office of the registrar is located or by a member of a
national securities exchange.



                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by the
Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state the
amount you elect to have purchased: $___________


Date:                              Your Signature:
                         (Sign exactly as your name appears on this Senior Note)

                              Tax Identification No.:________________________


Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company
located, or having a correspondent located, in the City of New York or the city
where the principal office of the registrar is located or by a member of a
national securities exchange.




                                     EXHIBIT H

                        FORM OF ____% SENIOR DISCOUNT NOTE 
                            AND TRUSTEE CERTIFICATION OF
                                   AUTHENTICATION



                                     $500,000,000
                          __ % Senior Discount Note due 2010

No.                                                                $500,000,000

                           NIAGARA MOHAWK POWER CORPORATION

promises to pay to

or their registered assigns, the principal sum of ______________________ Dollars
($        ) on July 1, 2010.

Interest Payment Dates: January 1 and July 1, commencing January 1, 2004.

Record Dates: December 15 and June 15

                              Dated: ____________ ___, 1998

                              NIAGARA MOHAWK POWER CORPORATION


                              By:_______________________________
                                   Name:
                                   Title:


                              By:_______________________________
                                   Name:
                                   Title:
                    
This is one of the Senior Notes referred 
to in the within-mentioned Indenture:    

IBJ SCHRODER BANK & 
TRUST COMPANY, as Trustee


By:______________________________
     Authorized Signature



                               (Back of Senior Note)

                         ___% Senior Discount Note due 2010

     Capitalized terms used herein shall have the meanings assigned to them in
the Indenture referred to below unless otherwise indicated.

     1.   INTEREST.  Niagara Mohawk Power Corporation, a New York corporation
(the "Company") promises to pay interest on the principal amount of this ___%
Senior Discount Note due 2010 (the "Senior Note") at the rate and in the manner
specified below.

          This Senior Discount Note was issued at a substantial discount from
its principal amount at maturity.  Until July 1, 2003, no interest will accrue
on this Senior Discount Note, but the Accreted Value will increase (representing
amortization of original issue discount) between the date of initial issuance
and July 1, 2003, on a semi-annual bond equivalent basis using a 360-day year
comprised of twelve 30-day months, such that the Accreted Value shall be equal
to the full principal amount at maturity of this Senior Discount Note on July 1,
2003.  Thereafter, interest on this Senior Discount Note will accrue at a rate
of ___% per annum and will be payable in cash semi-annually in arrears on
January 1 and July 1 of each year, commencing January 1, 2004, or if any such
day is not a Business Day (as defined in the Indenture referred to below), on
the next succeeding Business Day (each an "Interest Payment Date").

          Interest will be computed on the basis of a 360-day year consisting of
twelve 30-day months for the actual number of days elapsed.  Interest shall
accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from July 1, 2003.  To the extent lawful, the Company
shall pay interest on overdue principal and premium at the rate of 1% per annum
in excess of the then applicable interest rate on this Senior Note; it shall pay
interest on overdue installments of interest (without regard to any applicable
grace periods) at the same rate to the extent lawful.  The rates of interest
specified in the Indenture and this Senior Note are nominal rates and all
interest payments and computations are to be made without allowance or deduction
for deemed reinvestment of interest.

     2.   METHOD OF PAYMENT.  The Company will pay interest on the Senior Notes
to the Persons who are registered Holders of Senior Notes at the close of
business on the December 15 and June 15 next preceding the Interest Payment
Date, even if such Senior Notes are cancelled after such record date and on or
before such Interest Payment Date.  The Senior Notes will be payable as to
principal, premium, if any, and interest at the office or agency of the Company
maintained for such purpose within or without the City and State of New York,
or, at the option of the Company, payment of interest may be made by check
mailed to the Holders at their addresses set forth in the register of Holders. 
Such payment shall be in such payment of public 

                                      1



and private debts coin or currency of the United States of America as at the 
time of payment is legal tender for payment of public and private debts.

     3.   PAYING AGENT AND REGISTRAR.  Initially, the Trustee will act as Paying
Agent and Registrar.  The Company may change any Paying Agent or Registrar or
co-registrar without prior notice to any Holder.  The Company may act in any
such capacity.

     4.   INDENTURE.  The Company issued the Senior Notes under an Indenture
dated as of June 30, 1998 (the "Indenture") between the Company and the Trustee.
The terms of the Senior Notes include those stated in the Indenture and those
made part of the Indenture by reference to the Trust Indenture Act of 1939, as
amended (15 U.S. Code Sections  77aaa-77bbbb).  The Senior Notes are subject to
all such terms, and Holders are referred to the Indenture and such Act for a
statement of such terms.  The terms of the Indenture shall govern any
inconsistencies between the Indenture and the Senior Notes.  The Senior Notes
are senior unsecured obligations of the Company limited to $500 million
principal amount at maturity in aggregate.

     5.   OPTIONAL REDEMPTION.  

          Prior to July 1, 2003, the Company may redeem all or any portion of
the Senior Notes, at any time upon not less than 30 nor more than 60 days'
notice, in cash at a redemption price equal to 100% of the Accreted Value
thereof plus the Make-Whole Premium.  On or after July 1, 2003, the Company may
redeem all or any portion of the Senior Notes, at any time upon not less than 30
nor more than 60 days' notice, at the redemption prices (expressed as
percentages of principal amount) set forth below plus accrued and unpaid
interest thereon, if any, to the applicable redemption date, if redeemed during
the twelve-month period beginning on July 1 of the years indicated below:



                YEAR                               PERCENTAGE
                                                
                2003 . . . . . . . . . . . . . . . .       %
                2004 . . . . . . . . . . . . . . . .       %
                2005 . . . . . . . . . . . . . . . .       %
                2006 and thereafter. . . . . . . . . 100.00%


     6.   MANDATORY REDEMPTION.

     Except as set forth in paragraph 7 below, the Company is not required to
make mandatory repurchase, redemption or sinking fund payments with respect to
the Senior Notes.

                                      2



     7.   CHANGE OF CONTROL OFFER AND ASSET SALE OFFER.  

     (a)  If there is a Change of Control Triggering Event, each Holder of 
Senior Notes will have the right to require the Company to repurchase all or 
any part (equal to $1,000 in principal amount or an integral multiple 
thereof) of each Holder's Senior Notes pursuant to the offer described in the 
Indenture (a "Change of Control Offer") at an offer price in cash equal to 
(i)  101% of the aggregate principal amount thereof (if such repurchase 
occurs on or after July 1, 2003) plus accrued and unpaid interest thereon, if 
any, to the date of purchase or (ii) 101% of the Accreted Value thereof (if 
such repurchase occurs prior to July 1, 2003).  Within 30 days following any 
Change of Control Triggering Event, the Company will mail a notice to each 
Holder setting forth the procedures governing the Change of Control Offer as 
required by the Indenture.

     (b)  Under certain circumstances, the Company, following a Sale of 
Assets, may commence an offer to all Holders of Senior Notes (as "Asset Sale 
Offer") to purchase Senior Notes with the cash portion of the Net Proceeds of 
such Sale of Assets at an offer price in cash in an amount equal to (a) 100% 
of the principal amount thereof (if such repurchase occurs on or after July 
1, 2003) plus accrued and unpaid interest thereon, if any, to the date of 
purchase or (b) 100% of the Accreted Value thereof (if such repurchase occurs 
prior to July 1, 2003).

     (c)  In the event of either 7(a) or 7(b), Holders may elect to have all 
or a portion of their Senior Notes purchased by completing the form entitled 
"Option of Holder to Elect Purchase" appearing below.

     8.   NOTICE OF REDEMPTION.  Notice of redemption will be mailed at least 
30 days but not more than 60 days before the redemption date to each Holder 
whose Senior Notes are to be redeemed at his registered address.  Senior 
Notes in denominations larger than $1,000 may be redeemed in part but only in 
whole multiples of $1,000, unless all of the Senior Notes held by a Holder 
are to be redeemed.  On and after the redemption date interest ceases to 
accrue on Senior Notes or portions thereof called for redemption.

     9.   DENOMINATIONS, TRANSFER, EXCHANGE.  The Senior Notes are in 
registered form without coupons in denominations of $1,000 and integral 
multiples of $1,000.  The transfer of Senior Notes may be registered and 
Senior Notes may be exchanged as provided in the Indenture.  The Registrar 
and the Trustee may require a Holder, among other things, to furnish 
appropriate endorsements and transfer documents and the Company may require a 
Holder to pay any taxes and fees required by law or permitted by the 
Indenture.

     10.  PERSONS DEEMED LEGAL OWNERS.  Prior to due presentment to the 
Trustee for registration of the transfer of this Senior Note, the Trustee, 
any Agent and the Company may deem and treat the person in whose name this 
Senior Note is registered as its legal and absolute owner for the purpose of 
receiving payment of principal of, premium, if any, and interest on this 
Senior 

                                      3



Note and for all other purposes whatsoever, whether or not this Senior Note 
is overdue, and neither the Trustee, any Agent nor the Company shall be 
affected by notice to the contrary.  The registered Holder of a Senior Note 
may be treated as its legal owner for all purposes.

     11.  AMENDMENT, SUPPLEMENT AND WAIVER.  Subject to certain exceptions, 
the Indenture and the Senior Notes may be amended or supplemented with the 
consent of the Holders of at least a majority in principal amount at maturity 
of the then outstanding Senior Notes (including, without limitation, consents 
obtained in connection with a purchase of, or tender offer or exchange offer 
for, Senior Notes), and, subject to Sections 6.04 and 6.07 of the Indenture, 
any existing Default or Event of Default (other than a Default or Event of 
Default in the payment of the principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded) or compliance with any provision of the Indenture or the Senior 
Notes may be waived with the consent of the Holders of a majority in 
principal amount at maturity of the then outstanding Senior Notes.  Without 
the consent of any Holder of a Senior Note, the Indenture or the Senior Notes 
may be amended or supplemented, and the Company and the Trustee may enter 
into Supplemental Indentures which shall thereafter form a part of the 
Indenture, to cure any ambiguity, defect or inconsistency, to secure the 
Senior Notes under circumstances set forth in the Indenture, to establish and 
create new series of Senior Notes, to provide that the Company shall not 
issue any additional series of Senior Notes, to add additional covenants and 
agreements of the Company to the Indenture, to provide for alterative methods 
or forms for evidencing and recording ownership of Senior Notes, to provide 
for the assumption of the Company's obligations to Holders of the Senior 
Notes in case of a merger, amalgamation, consolidation or sale of all or 
substantially all of the Company's assets, to make any change that would 
provide any additional rights or benefits to the Holders of the Senior Notes 
or that does not adversely affect the legal rights under the Indenture of any 
such Holder, or to comply with the  requirements of the SEC in order to 
effect or maintain the qualification of the Indenture under the Trust 
Indenture Act.

     12.  DEFAULTS AND REMEDIES.  Events of Default include: (i) default for 
60 days in the payment when due of interest on the Senior Notes; (ii) default 
in payment when due of the principal of, or premium, if any, on the Senior 
Notes; (iii) failure by the Company to comply with any of the provisions of 
Sections 4.07, 4.09 or 5.01 of the Indenture; (iv) failure by either the 
Company for 60 days after written notice by the Trustee or the Holders of at 
least 25 % or more in aggregate principal amount of the Senior Notes to 
comply with its other agreements in the Indenture or the Senior Notes; (v) 
default under certain other agreements relating to Indebtedness of the 
Company which default involves non-payment of principal or interest, or 
results in the acceleration of such Indebtedness prior to its stated 
maturity; (vi) certain final judgments for the payment of money that remain 
undischarged for a period of 60 days; and (vii) certain events of bankruptcy 
or insolvency with respect to the Company or any of its Significant 
Subsidiaries.  If any Event of Default occurs and is continuing, the Trustee 
or the Holders of at least 25 % in principal amount at maturity of the then 
outstanding Senior Notes may declare all the Senior Notes to be due and 
payable.  Notwithstanding the foregoing, in the case of an Event of Default 
arising from certain events of 

                                      4



bankruptcy or insolvency, all outstanding Senior Notes will become due and 
payable without further action or notice.  Holders may not enforce the 
Indenture or the Senior Notes except as provided in the Indenture.  Subject 
to certain limitations, Holders of a majority in principal amount at maturity 
of the then outstanding Senior Notes may direct the Trustee in its exercise 
of any trust or power.  The Trustee may withhold from Holders of the Senior 
Notes notice of any continuing Default or Event of Default (except a Default 
or Event of Default relating to the payment of principal or interest) if it 
determines that withholding notice is in their interest.  The Holders of a 
majority in aggregate principal amount at maturity of the Senior Notes then 
outstanding by notice to the Trustee may on behalf of the Holders of all of 
the Senior Notes waive any existing Default or Event of Default and its 
consequences under the Indenture except a continuing Default or Event of 
Default in the payment of principal of, or interest on, the Senior Notes, 
except a payment default resulting from an acceleration that has been 
rescinded.  The Company is required to deliver to the Trustee annually a 
statement regarding compliance with the Indenture, and the Company is 
required upon becoming aware of any Default or Event of Default, to deliver 
to the Trustee a statement specifying such Default or Event of Default.

     13.  TRUSTEE DEALINGS WITH COMPANY.  The Trustee, in its individual or 
any other capacity, may make loans to, accept deposits from, and perform 
services for the Company or its Affiliates, and may otherwise deal with the 
Company or its Affiliates, as if it were not the Trustee.

     14.  NO RECOURSE AGAINST OTHERS.  A director, officer, employee, 
incorporator or stockholder, of the Company as such, shall not have any 
liability for any obligations of the Company under the Senior Notes or the 
Indenture or for any claim based on, in respect of, or by reason of, such 
obligations or their creation.  Each Holder by accepting a Senior Note waives 
and releases all such liability.  The waiver and release are part of the 
consideration for the issuance of the Senior Notes.

     15.  AUTHENTICATION.  This Senior Note shall not be valid until 
authenticated by the manual signature of the Trustee or an authenticating 
agent.

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

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

                                      5



     The Company will furnish to any Holder upon written request and without 
charge a copy of the Indenture.  Requests may be made to:

                         Niagara Mohawk Power Corporation
                         300 Erie Boulevard West
                         Syracuse, New York  13202
                         Attention: Chief Financial Officer


                                      6



                                ASSIGNMENT FORM


To assign this Senior Note, fill in the form below: (I) or (we) assign and
transfer this Senior Note to

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








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

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



Date:

                              Your Signature:
             (Sign exactly as your name appears on the face of this Senior Note)

Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company
located, or having a correspondent located, in the City of New York or the city
where the principal office of the registrar is located or by a member of a
national securities exchange.



                         OPTION OF HOLDER TO ELECT PURCHASE

     If you want to elect to have this Senior Note purchased by the Company
pursuant to Section 4.10 or 4.14 of the Indenture, check the box below:

          / /  Section 4.10        / /  Section 4.14 

     If you want to elect to have only part of the Senior Note purchased by the
Company pursuant to Section 4.10 or Section 4.14 of the Indenture, state the
amount you elect to have purchased: $___________


Date:                              Your Signature:
                         (Sign exactly as your name appears on this Senior Note)

                              Tax Identification No.:________________________


Signature Guarantee.*





* Your signature must be guaranteed by a commercial bank or trust company
located, or having a correspondent located, in the City of New York or the city
where the principal office of the registrar is located or by a member of a
national securities exchange.