Market Participants:

Please assure that this Notification is forwarded to your respective
Operating Departments ---

Notification of Operating Procedure Update

*	The following new or revised ISO Operating Procedures have been
implemented and are posted for reference on the ISO Website.

ISO Operating Procedure posted:  S-320 Four Corners-Moenkopi and
Eldorado-Moenkopi 500 kV Lines
Version: 1.1
Effective Date: 1-30-02
Procedure Purpose: This Procedure addresses specific requirements associated
with operating and scheduling the Four Corners-El Dorado-Moenkopi 500 kV
path. The Four Corners-El Dorado-Moenkopi path is made up of the 500 kV Four
Corners-Moenkopi line and the 500 kV El Dorado-Moenkopi line. Both 500 kV
transmission lines are located within Arizona Public Service Company's (APS)
Control Area.  The ISO-APS Control Area boundary is metered at El Dorado.
The line is operated in accordance with an existing Operating Agreement
between APS and Southern California Edison (SCE).  SCE's entitlements on
this line are "Converted Rights" as of the ISO Operations Date.
Changes / Reasons: See attached
 <<S-320 Procedure Change Description V1.1.doc>> 

*	Please find them at
http://www1.caiso.com/thegrid/operations/opsdoc/index.html under the
appropriate Operating Procedure section heading.

Please e-mail any comments or questions to the 'Procedure Control Desk'
mailbox [mailto:procctrldesk@caiso.com] and we will respond as soon as
possible.

Thank you!

California ISO Procedure Control Desk




Client Relations Communications.0921
CRCommunications@caiso.com