NOTICE DATE: September 30, 2015 NOTICE TYPE: W-A093015-01 Operations SHORT DESCRIPTION: Notification of Change of Generation Resource Designation for Luminant Generation Company LLC (RE), MNSES_Unit1 and MNSES_Unit2 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: October 10, 2015 LONG DESCRIPTION: On September 25, 2015, ERCOT received a Notification of Change of Generation Resource Designation (NCGRD) for the following Generation Resources with an effective date of October 10, 2015: * Luminant Generation Company LLC - MNSES_Unit1 and MNSES_Unit2 The NCGRD states that these seasonally Mothballed Generation Resources will change their designation to operational as of October 10, 2015. ADDITIONAL INFORMATION: Pursuant to Section 3.14.1.9(4), ERCOT has posted the notification in the list titled "Notice of Change of Generation Resource Designation" on the Generation page<https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Generation> of the Market Information System (MIS) Secure Area. An ERCOT 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]<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. mm