NOTICE DATE: May 13, 2010 NOTICE TYPE: M-A022610-02 Operations SHORT DESCRIPTION: Approved proposal to install a new SPS at Mount Enterprise INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: October 1, 2010 LONG DESCRIPTION: ERCOT has received a request to install a Special Protection System (SPS) at the Oncor Mount Enterprise substation. This SPS is intended to protect against overloads on the Mount Enterprise - Nacogdoches 345 kV line that can occur under various system conditions. ERCOT has completed its review and has approved the proposal. Further details of this SPS can be found in the "Special Protection Systems Information" section of the ERCOT Planning and Operations Information secure website: http://planning.ercot.com/login/login. 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 Relations via email at [log in to unmask]<blocked::mailto:[log in to unmask]>. If you are receiving email 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/>. dh