NOTICE DATE: June 3, 2013

NOTICE TYPE: M-A060313-01 Outage – Wholesale

SHORT DESCRIPTION: Planned system maintenance with impacted services

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: June 6, 2013, 14:30 – 19:30 CDT

LONG DESCRIPTION: ERCOT will be performing planned system maintenance on a source database on Thursday, June 6, 2013, within a maintenance window of 14:30 – 19:30 CDT.

During the maintenance period, Market Participants may experience intermittent issues with the following services:

· Current Day Report (CDR) publishing to the ERCOT Market Information System (MIS)

Note that the outage is scheduled to begin at approximately 14:30 CDT; however, this start time may be delayed depending on the current system conditions.

ADDITIONAL INFORMATION: Note that the Current Day Reports (CDR) system will be impacted. Reports will be rerun and reposted as applicable. The MIS Dashboards and ERCOT.com price displays will not be populated with data during this timeframe.

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 email at [log in to unmask].

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