July 16, 1998

The Honorable David P. Boergers
Acting Secretary
Federal Energy Regulatory Commission
888 First Street, N.E.
Washington, D.C. 20426

	Re:	AES Redondo Beach, LLC, Docket No. ER98-2843-000; AES Huntington Beach, LLC, Docket No. ER98-2844-000; AES Alamitos, LLC, Docket No. ER98-2883-000; Long Beach Generation, LLC, Docket No. ER98-2972-000; El Segundo Power, LLC, Docket No. ER98-2971-000; Ocean Vista Power Generation, LLC, Mountain Vista Power Generation, LLC; Alta Power Generation, LLC; Oeste Power Generation, LLC; Ormond Beach Power Generation, LLC, Docket No. ER98-2977-000

Dear Secretary Boergers:

	On July 13, 1998, the ISO filed its Emergency Motion for Stay, Notice of Action Take, Request for Rehearing, and Motion for Clarification in the above-noted dockets.  Because of the need to brings these matters to the Commission’s attention on an expedited basis, counsel for the ISO was unable to correct certain errors in the filing.  The ISO is therefore submitting an original and fourteen copies of this letter to identify the following errata:

1.	On page three, the last sentence of the second full paragraph, should read, “If the market had been allowed to run, bids of $9,999/MW for Replacement Reserves, which had been received, would have resulted in costs of $17.2 million to the market in the SP15 zone.”

2.	Footnote three should read, “As noted infra at n. 4, in the auction held today for Regulation service, a bid of $2,500/MW already has been submitted.”

3.	The final partial sentence on page 16, continuing on page 17, should read, “Reliability conditions did not allow the ISO to reduce planned purchases; therefore the SP15 loads incurred costs of approximately $5 million in just those five hours.”

4.	On page 19, Specification of Error 3. should read, “Absent a time-differentiated study, the Commission should permit the ISO to cap bids at $500/MW.”

5.	Footnote 13 should begin as follows: “In a footnote to the statement quoted at n. 12, the Commission noted . . . .”

6.	On Page 33, the heading should read, “If Market-Based Rates Are Permitted Without a Time-Differentiated Study, Protections Should Be Required.  Specifically, the ISO Should Be Permitted to Cap Bids at $500/MW.

7.	On Page 36, the first sentence should read, “To minimize the potential effect of such an occurrence, the ISO respectfully requests that if an absolute stay is not granted, that the Commission authorize it to cap Ancillary Service bids at $500/MW.”

8.	On page 38, the fourth requested relief should read, “(4) authorize the ISO to cap all Ancillary Service bids at $500/MW;”.

	I am also enclosing fifteen updated versions of Attachments A and B, including data for July 13, 1998.  

	Also enclosed is an extra copy of the filing to be time/date stamped and returned to us by the messenger.  Thank you for your assistance.

						Respectfully submitted,

						Michael E. Ward
						Swidler & Berlin, Chartered, Suite 300
						3000 K Street, N.W.
						Washington D.C.  20007
						
						Counsel for the California 
						Independent System Operator

Enclosures
cc:	Commissioner 
3037190.1
	Service List