EXHIBIT 10.1 ------------ 16 FOURTH AMENDMENT 	THIS FOURTH AMENDMENT, made and entered into as of the 26th day of June 1996, by and between Selkirk Cogen Partners, L.P. ("Selkirk") and Niagara Mohawk Power Corporation ("NIAGARA"). Capitalized terms not defined herein shall have the meaning set forth in the Power Purchase Agreement (as defined below). WHEREAS, Selkirk (by assignment) and NIAGARA are parties to an Agreement dated December 7, 1987, which was approved by the Public Service Commission of the State of New York on March 30, 1988, as amended by an Amendment dated December 14, 1989, a Second Amendment dated January 25, 1990, a Third Amendment dated October 23, 1992, and an Agreement dated March 31, 1994 (collectively, the "Power Purchase Agreement"); and WHEREAS, Selkirk and NIAGARA have agreed to amend the Power Purchase Agreement to set forth new procedures for determining the PLANT's DMNC; 	NOW, THEREFORE, in consideration of the premises and covenants hereinafter set forth, the parties hereto have agreed and do hereby mutually agree as follows: FIRST: The last paragraph of Section I of Attachment I to the Power Purchase Agreement is hereby amended by deleting it in its entirety and substituting the following in lieu thereof: 		 "The Dependable Maximum Net Capability ("DMNC" ) shall be 		 determined in accordance with the testing procedures set forth in 		 Section VII of this Attachment I." SECOND: Section VII(a) of Attachment I to the Power Purchase Agreement is hereby amended as follows: 17 1.	by inserting in the first sentence the phrase "testing procedures set 	 forth in Section VII(c) of this Attachment I and Sections II (A), II (D), VII (A) and VII (C) of" after the phrase "accordance with the"; and 	2.	by deleting the last sentence of Section VII(a) of Attachment I. THIRD: Section VII(c) of Attachment I to the Power Purchase Agreement is hereby amended by deleting it in its entirety and substituting the following in lieu thereof: 		 		 "(c) Semi-Annual Capability Test. Throughout the term of the 		Agreement, SELLER shall schedule and conduct at least one ( 1 ) 		Capability Test, and may, at SELLER's discretion, schedule, up to 		three (3) additional Capability Tests, per Capability Demonstration 		Period to determine the DMNC. For the purposes of this AGREEMENT, 		the Capability Demonstration Periods shall be, in each year, between 		November 1 and April 15 ("Winter Capability Demonstration Period") 		and between June 1 and September 15 ("Summer Capability Demonstration 		Period"). Upon completion of testing for the Capability 		Demonstration Period, SELLER shall provide written notice ("DMNC 		Notice") to NIAGARA of the PLANT's DMNC for that Capability 		Demonstration Period and, therefore, for the corresponding "Winter 		Capability Period" (November 1 through April 30) or "Summer 		Capability Period" (May 1 through October 31), respectively. The 		DMNC shall be the higher of: (i) the highest Capability Test during 		the current Capability Demonstration Period, or (ii) the highest 		Capability Test during the last like Capability Demonstration Period. 		SELLER shall notify NIAGARA at least three (3) business days in 		advance of any Capability Test in order to allow NIAGARA to have one 		or more of its representatives present to observe the Capability 		Test, except that SELLER may cancel any scheduled Capability Test by 		giving NIAGARA notice by 10:00 A.M. on the day before the scheduled 		Capability Test and such cancelled Capability Test shall not be 		considered a Capability Test for the Capability Demonstration 		Period." 	FOURTH: Section VII of Attachment I to the Power Purchase Agreement is hereby amended by adding the following as Section VII(d): 18 	 		"(d) Adjustment of Payments for Capability Test. If the DMNC for any 		Winter or Summer Capability Period, as set forth in the DMNC Notice 		for that Winter or Summer Capability Period (the "Effective DMNC"), 		is higher or lower than the DMNC used to calculate payments for that 		Winter or Summer Capability Period prior to delivery of the DMNC 		Notice, then the payments for that Winter or Summer Capability Period 		shall be recalculated using the Effective DMNC and either (i) SELLER 		shall refund any overpayments to NIAGARA within thirty (30) days of 		delivery of the DMNC Notice, or (ii) SELLER shall deliver an invoice 		to NIAGARA for any underpayment which invoice NIAGARA shall pay 		within thirty (30) days of receipt. No interest shall accrue on 		amounts paid when due in accordance with the preceding sentence; 		amounts not paid when due shall be subject to late payment charge 		calculated in accordance PARAGRAPH NINTH of the Agreement." 	FIFTH: All terms and conditions of the Power Purchase Agreement not expressly amended herein shall remain in full force and effect. 	 	SIXTH: This Fourth Amendment may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such separate counterparts shall together constitute but one and the same instrument. 	IN WITNESS WHEREOF, Selkirk and NIAGARA have caused this Fourth Amendment to be executed by their proper officers thereunto duly authorized as of the date written below. 	SELKIRK COGEN PARTNER, L.P. 	By JMC Selkirk, Inc., the Managing General Partner 	By:	/s/ George J. Grunbeck 	 _______________________ 	NIAGARA MOHAWK POWER CORPORATION 	By:	/s/ C.E. NADEAU 	 ------------------------------ 		C.E. Nadeau 		Vice President 		Power Transactions & Planning 19