****************************************************************************************** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials ****************************************************************************************** NOTICE DATE: April 30, 2014 NOTICE TYPE: M-A043014-01 Operations SHORT DESCRIPTION: Changes to substation to Load Zone assignments INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: May 1, 2014 LONG DESCRIPTION: The following corrections to the Load Zone assigned to the Electrical Buses at the substations listed in the table below will be made in the ERCOT Network Model effective May 1, 2014. Substation Owner Previous LOADZONE Corrected LOADZONE Effective Date ALIBATES Sharyland Utilities LZ_NORTH LZ_WEST 5/1/2014 CLEARCRO Electric Transmission Texas LZ_NORTH LZ_WEST 5/1/2014 CTT_CROS Cross Texas Transmission LZ_NORTH LZ_WEST 5/1/2014 CTT_GRAY Cross Texas Transmission LZ_NORTH LZ_WEST 5/1/2014 GAUSS Electric Transmission Texas LZ_NORTH LZ_WEST 5/1/2014 OGALLALA Sharyland Utilities LZ_NORTH LZ_WEST 5/1/2014 RAILHEAD Cross Texas Transmission LZ_NORTH LZ_WEST 5/1/2014 TULECNYN Sharyland Utilities LZ_NORTH LZ_WEST 5/1/2014 WINDMILL Sharyland Utilities LZ_NORTH LZ_WEST 5/1/2014 All the substations are switching stations with no load or generation. The changes in the Load Zone assignments do not impact calculation of Settlement Point Prices for the associated Load Zones since Locational Marginal Prices (LMPs) at Electrical Buses with no load have a zero weighting factor in the load-weighted average LMP calculations used to determine Load Zone Settlement Point Prices. 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. dg