NOTICE DATE:  April 3, 2008

NOTICE TYPE:  W-A040308-01   Operations

CLASSIFICATION: Public

SHORT DESCRIPTION:  “Total On-Line Capacity” calculation on the ERCOT Portal to be corrected

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  April 3, 2008

LONG DESCRIPTION:  ERCOT has determined that the calculation which provides the Total On-Line Capacity value on the ERCOT Portal (http://mospublic.ercot.com/ercot/jsp/frequency_control.jsp) needs to be revised to exclude self-serve generation.  Until this revision is made, Total On-Line Capacity may be determined by adding the Total Generation and Total Spinning Reserve values posted on this portal display.

CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via e-mail at [log in to unmask].

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