October 15, 1999

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

Re:	AES Redondo Beach, L.L.C.			Docket Nos.	ER98-2843-___
AES Huntington Beach, L.L.C.		Docket Nos.	ER98-2844-___
AES Alamitos, L.L.C.				Docket Nos.	ER98-2883-___

El Segundo Power, LLC			Docket Nos.	ER98-2971-___
Long Beach Generation, LLC			Docket Nos.	ER98-2972-___

Ocean Vista Power Generation, L.L.C.	Docket Nos.	ER98-2977-___
Mountain Vista Power Generation, L.L.C.
Alta Power Generation, L.L.C.
Oeste Power Generation, L.L.C.
Ormond Beach Power Generation, L.L.C.

Williams Energy Service Company		Docket No.	ER98-3106-___

Duke Energy Oakland, L.L.C.			Docket No.	ER98-3146-___
Duke Energy Morro Bay, L.L.C.		Docket No.	ER98-3147-___
Duke Energy Moss Landing, L.L.C.		Docket No.	ER98-3148-___

Southern California Edison Company	Docket No.	EL98-62-___

Sempra Energy Trading Corp.		Docket No.	ER98-4497-___
San Diego Gas & Electric Co.		Docket No.	ER98-4498-___

California Independent System		Docket No.	ER99-1971-___
    Operator Corp.

Dear Secretary Boergers:
The California Independent System Operator Corporation (“ISO”) submits this letter to notify the Commission and the participants in this proceeding of the status of a report that the Commission directed the ISO Market Surveillance Committee ("MSC") to prepare pursuant to the Commission's October 28, 1998 and May 26, 1999 orders in the above-captioned dockets.  AES Redondo Beach, L.L.C., et al., 85 FERC ¶ 61,123 (1998), order on reh'g, 87 FERC ¶ 61,208 (1999).  
The MSC has informed the ISO that the report on the ISO's Ancillary Services and Imbalance Energy markets being prepared pursuant to those orders is currently undergoing review and revision, a process that will not be completed in time for submission of the report to the Commission today.  The ISO and the MSC regret this short delay.  The ISO understands that the MSC will provide the report for filing with the Commission at the start of next week.  The ISO will notify the Commission and the participants in this proceeding of any additional developments concerning this report.
Thank you for your attention to this matter.

					Respectfully submitted,

					________________________________
					Kenneth G. Jaffe
					David B. Rubin 
					Sean A. Atkins
					Attorneys for the California Independent 
						System Operator Corporation

cc:	Service List