PDCI Re-rate for 8/21/01

Market Notification: After the Day-Ahead Market closed, PDCI TTC N-S was
changed from 1757 to 2875 MW and S-N was changed from 1705 MW to 2804 MW
starting HE02 for operating day 08/21/01. This was due to return of the BPA
Celilo Valve Group #8. The first applicable hour to run with the adjusted
rating in the Hour-Ahead Market is HE05 for 08/21/01. Inquiries please call
(916) 351-4409. Please address real-time operational inquiries to the
Real-Time scheduling desk at (916) 351-2493.

The system conditions described in this communication are dynamic and
subject to change. While the ISO has attempted to reflect the most current,
accurate information available in preparing this notice, system conditions
may change suddenly with little or no notice.