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Interim Report on 8/25/05 Event

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Summary:

California ISO Interim Report, August 25th, 2005 PDCI Loss and Subsequent Load Shedding Event

Extract:

As power use was approaching its daily peak on August 25, 2005, the loss of a major transmission line partially-owned and operated by Los Angeles Department of Water & Power required the ISO to direct utilities in southern California to drop 900 megawatts of firm load for approximately 40 minutes, and 800 megawatts of load from voluntary interruptible customers for approximately 77 minutes. CEO Yakout Mansour immediately initiated an investigation of the event, which was led by Armando Perez, Vice President Planning and Infrastructure Development. The findings and conclusions of the investigation to date are summarized in this report.

Document Locations:

• Operational Reports and Audits