NOTICE DATE: February 21, 2011 NOTICE TYPE: W-A022111-01 Extracts/Reports - Wholesale SHORT DESCRIPTION: Change to posting frequency for Hourly State Estimator Transmission Line Flows INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: February 23, 2011 LONG DESCRIPTION: The posting frequency for NP6-619-CD Hourly State Estimator Transmission Line Flows will change beginning February 23, 2011. Current Frequency: Hourly Updated Frequency: 5 Minutes The State Estimator Reports are located on the ERCOT Market Information System (MIS) under Real-Time Operations. 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<http://lists.ercot.com/>. dh