NOTICE DATE: February 15, 2010

NOTICE TYPE: M-A021510-01 INITIAL: MOS Listener

INTENDED AUDIENCE: All Market Participants

DAY AFFECTED: February 14, 2010 from 6:35 AM to 7:08 AM

DESCRIPTION: An unplanned outage was experienced with the MOS Listener on February 14, 2010 from 6:35 AM to 7:08 AM.

The MOS Listener is now operational.

Additional information will be provided as it becomes available.

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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JR/JA/AD