***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** NOTICE DATE: October 6, 2017 NOTICE TYPE: M-A100617-01 Operations SHORT DESCRIPTION: Notification of Suspension of Operations for LUMINANT GENERATION COMPANY LLC (RE) – Monticello Unit 1 (MNSES_UNIT1), Monticello Unit 2 (MNSES_UNIT2), and Monticello Unit 3 (MNSES_UNIT3) INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: January 4, 2018 LONG DESCRIPTION: ERCOT received a Notification of Suspension of Operations (NSO) for the following Generation Resources: * Monticello Unit 1 (MNSES_UNIT1) * Monticello Unit 2 (MNSES_UNIT2) * Monticello Unit 3 (MNSES_UNIT3) The NSO indicates that Luminant Generation Company LLC (Luminant) will decommission and retire the above-referenced Generation Resources permanently on January 4, 2018. The NSO further identifies the Generation Resources as having the following summer Seasonal Net Max/Minimum Sustainable Ratings: Generation Resource Seasonal Net Max Sustainable Rating (MW) Seasonal Net Minimum Sustainable Rating (MW) Monticello Unit 1 (MNSES_UNIT1) 535 210 Monticello Unit 2 (MNSES_UNIT2) 535 210 Monticello Unit 3 (MNSES_UNIT3) 795 320 A copy of the NSO is posted under the Notice of Suspension of Operations portlet on the Grid/Generation<https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Generation> page of the ERCOT Market Information System (MIS) Secure Area. An ERCOT Digital Certificate is required to access the MIS. ACTION REQUIRED: Please send any comments you may have regarding this NSO to [log in to unmask]<mailto:[log in to unmask]>, with “Luminant (MNSES_UNIT1, MNSES_UNIT2, MNSES_UNIT3) NSO Application” in the subject line. Comments are due no later than October 20, 2017. All comments will be posted to the Grid/Generation<https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Generation> page of the MIS Secure Area. 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. sa