NOTICE DATE:  May 5, 2008

NOTICE TYPE:  W-A040308-02   UPDATE Operations

CLASSIFICATION: Public

SHORT DESCRIPTION:  "Total On-Line Capacity" calculation on the ERCOT
Portal has been corrected.

INTENDED AUDIENCE:  All Market Participants

DAY AFFECTED:  May 1, 2008

LONG DESCRIPTION:  ERCOT has corrected the Total On-Line Capacity on the
ERCOT Portal (http://mospublic.ercot.com/ercot/jsp/frequency_control.jsp
<http://mospublic.ercot.com/ercot/jsp/frequency_control.jsp> ).  The
value was revised to exclude self-serve generation.

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] <mailto:[log in to unmask]> .

If you are receiving e-mail from an ERCOT distribution list that you no
longer wish to receive, please follow this link in order to unsubscribe
from this list: http://lists.ercot.com <http://lists.ercot.com/> .

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