NOTICE DATE: November 24, 2008 NOTICE TYPE: W-A112408-01 Operations SHORT DESCRIPTION: ERCOT has determined the Congestion Management (CM) Zone Shadow Price names for 2009. The ERCOT test environment will be available for market participant year-end testing. INTENDED AUDIENCE: QSE Operations and Settlement Personnel DAYS AFFECTED: December 11 and 16, 2008 - Test Days LONG DESCRIPTION: ERCOT has determined the short names for the 2009 Congestion Management Zones and the recorder names for the 2009 Congestion Shadow Prices. The Short Names are the identifiers that Market Participants will see in their Data Extracts designating the CM Zone in billing determinants. These values are: CM Zone Name Short Name NORTH2009 N09 HOUSTON2009 H09 SOUTH2009 S09 WEST2009 W09 The Shadow Price Recorder names are as follows: Congestion Path Name Recorder Name WEST-NORTH MCPESPC_W09N09 NORTH-WEST MCPESPC_N09W09 SOUTH-NORTH MCPESPC_S09N09 NORTH-SOUTH MCPESPC_N09S09 NORTH-HOUSTON MCPESPC_N09H09 ADDITIONAL INFORMATION: The ERCOT Market Operations Test Environment (MOTE) will be available for two test days on December 11 and 16, 2008 according to the schedules below. MOTE 2009 CM Zone Testing - Test Day #1 December 11 Real-time Simulated time 12/11/08 8:00 12/31/08 17:00 Start test; Day Ahead and AS Market Open for Trade Day January 1, 2009 12/11/08 11:00 12/31/08 20:00 AS Market Close for Trade Day January 1, 2009 12/11/08 12:00 12/31/08 21:00 Day Ahead Market Close for Trade Day January 1, 2009. Run RPRS for January 1, 2009 12/11/08 15:00 12/31/08 24:00 New Year Transition to January 1, 2009 12/11/08 18:00 1/01/09 03:00 Close of test MOTE 2008 CM Zone Testing - Test Day #2 December 16 Real-time Simulated time 12/16/08 8:00 12/31/08 17:00 Start test; Day Ahead and AS Market Open for Trade Day January 1, 2009 12/16/08 11:00 12/31/08 20:00 AS Market Close for Trade Day January 1, 2008 12/16/08 12:00 12/31/08 21:00 Day Ahead Market Close for Trade Day January 1, 2009. Run RPRS for January 1, 2009. 12/16/08 15:00 12/31/08 24:00 New Year Transition to January 1, 2009 12/16/08 18:00 1/01/09 03:00 Close of test ACTION REQUIRED: ERCOT requests participants to assess the impact on their systems and prepare accordingly. ERCOT will be conducting a simulation test of year-end transition in the second week of December 2008. 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 e-mail at [log in to unmask] If you are receiving e-mail 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/> . sg/kd