NOTICE DATE: May 7, 2015

NOTICE TYPE: M-B040815-02 Operations

SHORT DESCRIPTION: Update to the proposal to Retire Parkway SPS

INTENDED AUDIENCE: ERCOT Market Participants

DAY AFFECTED: August 5, 2015

LONG DESCRIPTION: ERCOT has received a proposal from Lower Colorado River Authority (LCRA) to retire the Parkway Special Protection System (SPS). The Parkway SPS was designed to monitor and relieve thermal violations on the Schertz to Parkway 138kV line (361T361). The exit strategy on file for this SPS is to upgrade the thermal rating of the Schertz to Parkway 138kV line from 220 MVA to 358 MVA. LCRA has indicated that this exit strategy has been implemented.

ERCOT has completed its review of the proposal to disable the Parkway SPS and is recommending that the Parkway SPS be removed.

The Parkway SPS is scheduled to be permanently removed from the field on August 5, 2015.

ADDITIONAL INFORMATION: Information regarding SPSs can be found on the ERCOT Market Information System (MIS) under Special Protection Systems and Remedial Action Plans. A digital certificate is required to access the MIS.

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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