NOTICE DATE: June 29, 2009

NOTICE TYPE: M-A062909-01 Outage – Mospublic.ercot.com

SHORT DESCRIPTION: Mospublic.ercot.com outage June 27, 2009

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: June 27, 2009, 5:20 AM – 6:25 AM

LONG DESCRIPTION: Mospublic.ercot.com experienced an outage on June 27, 2009 from 5:20 AM until 6:25 AM. The root cause has not yet been determined.

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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