NOTICE DATE: March 30, 2010 NOTICE TYPE: R-B033010-01- Informational SHORT DESCRIPTION: TDSP ESI ID report updated Data Definition Language (DDL) has been posted to ERCOT.com and Texas Market Link (TML) in preparation for Project 90011- AMS Meter Flag Addition. INTENDED AUDIENCE: TDSPs and LSEs DAYS AFFECTED: March 30, 2010 LONG DESCRIPTION: Project 90011- AMS Meter Flag Addition, is a market impacting project and will be implemented during the ERCOT on-cycle retail release planned for 12:00 PM Saturday, April 24, 2010 through 12:00 AM Monday, April 26, 2010 release. With the addition of the AMS Meter Flag column, a new DDL for the TDSP ESI ID report will be required. The updated DDL can be found at the following link: http://www.ercot.com/services/mdt/ddls/ or in the Extract Definitions folder found in the Public folder for Market Participants in TML. 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]<https://mail1.ercot.com/owa/UrlBlockedError.aspx>. DP/DH