Public Notices

This section contains public market notifications required by protocols as well as other market messages ERCOT may post for market transparency. Notices are categorized by types and can be filtered by selecting the desired category. ERCOT began archiving public notices November 3, 2011.

Nov 2018 Dec 2018 Jan 2019 Feb 2019 Mar 2019 Apr 2019
Date Message Type Status
Apr 21 2019 08:47:36 CST The Daily RSASM for Sunday April 21, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 21 2019 00:11:20 CST No sudden loss of generation greater than 450 MW occurred on April 20, 2019. Operational Information Active
Apr 20 2019 08:48:31 CST The Daily RSASM for Saturday April 20, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 20 2019 00:06:34 CST No sudden loss of generation greater than 450 MW occurred on April 19, 2019. Operational Information Active
Apr 19 2019 09:34:33 CST The minimum monthly Ancillary Services quantities have been posted to the ERCOT Market Information System (MIS) under the Projected Ancillary Service Requirements link under the Medium-Term System Adequacy heading. The posted quantities reflect minimum requirements only. ERCOT will follow-up with a Notification if any upward adjustments to these minimum quantities are made. https://mis.ercot.com/pps/tibco/mis/Pages/Grid+Information/Forecasts AS Postings Active
Apr 19 2019 08:47:17 CST The Daily RSASM for Friday April 19, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 19 2019 08:05:40 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Apr 19 2019 08:01:04 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Apr 19 2019 00:12:06 CST On April 18, 2019, a sudden loss of generation occurred at 17:05 totaling 717 MW. Frequency declined to 59.856 Hz, ERCOT load was 40, 018 MW. Operational Information Active
Apr 18 2019 17:09:20 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Apr 18 2019 17:04:56 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Apr 18 2019 15:03:11 CST ERCOT has cancelled the following notice: The East DC Tie will be unavailable from 08:00 04/15/2019 through 18:00 04/19/2019 due to a planned outage. Operational Information Cancelled
Apr 18 2019 08:47:35 CST The Daily RSASM for Thursday, April 18, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 18 2019 01:21:39 CST No sudden loss of generation greater than 450 MW occurred on April 17, 2019. Operational Information Active
Apr 17 2019 09:58:29 CST DC Tie Outage: The North DC Tie will be unavailable from 10:00 04/22/2019 through 16:00 04/26/2019 due to a planned outage. Operational Information Active
Apr 17 2019 08:47:54 CST The Daily RSASM for Wednesday, April 17, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 17 2019 00:22:55 CST On April 16, 2019, a sudden loss of generation occurred at 13:53 totaling 583 MW. Frequency declined to 59.912 Hz, ERCOT load was 41, 500 MW. Operational Information Active
Apr 16 2019 17:39:44 CST ERCOT has cancelled the following notice: The EAST DC Tie will be unavailable from 08:00 04/15/2019 through 18:00 04/19/2019 due to a planned outage. Operational Information Cancelled
Apr 16 2019 09:46:37 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Apr 16 2019 09:46:11 CST ERCOT has cancelled the following notice: At 09:34 ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Cancelled
Apr 16 2019 09:37:25 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Apr 16 2019 09:32:31 CST At 09:34 ERCOT is conducting an unannounced Constant Frequency Control test and has placed a QSE on Constant Frequency. Operational Information Active
Apr 16 2019 08:46:55 CST The Daily RSASM for Tuesday, April 16, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 16 2019 00:33:11 CST ERCOT has cancelled the following notice: No sudden loss of generation greater than 450 MW occurred on April 14, 2019. Operational Information Cancelled
Apr 16 2019 00:32:51 CST No sudden loss of generation greater than 450 MW occurred on April 15, 2019. Operational Information Active
Apr 16 2019 00:32:11 CST No sudden loss of generation greater than 450 MW occurred on April 14, 2019. Operational Information Active
Apr 16 2019 00:32:01 CST No sudden loss of generation greater than 450 MW occurred on April 14, 2019. Operational Information Active
Apr 15 2019 08:59:43 CST The Daily RSASM for Monday, April 15, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 15 2019 08:34:46 CST DC Tie Outage: The EAST DC Tie will be unavailable from 08:00 04/15/2019 through 18:00 04/19/2019 due to a planned outage. Operational Information Active
Apr 15 2019 00:31:09 CST No sudden loss of generation greater than 450 MW occurred on April 14, 2019. Operational Information Active
Apr 14 2019 08:45:15 CST The Daily RSASM for Sunday, April 14, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 14 2019 00:20:42 CST No sudden loss of generation greater than 450 MW occurred on April 13, 2019. Operational Information Active
Apr 13 2019 13:21:28 CST DC Tie Outage: The East DC Tie will be unavailable from 08:00 04/15/2019 through 18:00 04/19/2019 due to a planned outage. Operational Information Active
Apr 13 2019 08:45:25 CST The Daily RSASM for Saturday, April 13, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 13 2019 00:55:17 CST No sudden loss of generation greater than 450 MW occurred on April 12, 2019. Operational Information Active
Apr 12 2019 21:27:16 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 2045 for operating day 04/12 HE 23-24 and 4/13 HE 1-13 for 9.9 MWs REGUP. Operational Information Cancelled
Apr 12 2019 21:00:50 CST ERCOT has cancelled the following notice: The Railroad DC Tie will be derated to 150 MW beginning on 04/10 at 07:00 through 04/12 at 20:00 due to planned outage. Operational Information Cancelled
Apr 12 2019 20:24:40 CST ERCOT will execute a SASM at 2045 for operating day 04/12 HE 23-24 and 4/13 HE 1-13 for 9.9 MWs REGUP. Operational Information Active
Apr 12 2019 08:46:58 CST The Daily RSASM for Friday, April 12, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 12 2019 04:29:45 CST Ercot has resumed normal operations from the Primary Control Center in Taylor Operational Information Active
Apr 12 2019 04:28:52 CST ERCOT has cancelled the following notice: ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Cancelled
Apr 12 2019 00:00:07 CST On 04/11/19, a sudden loss of generation occurred at 03:37:55 totaling 664 MW. Frequency declined to 59.814 Hz, ERCOT load was 30, 852 MW. Operational Information Active
Apr 11 2019 16:37:42 CST Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Apr 11, 2019 is available. Operational Instruction Active
Apr 11 2019 08:45:37 CST The Daily RSASM for Thursday, April 11, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 11 2019 04:34:54 CST ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Apr 11 2019 03:42:49 CST ERCOT Responsive Reserve Has Been Recalled Operational Information Cancelled
Apr 11 2019 03:38:01 CST ERCOT Responsive Reserve Has Been Deployed Operational Information Active
Apr 11 2019 00:00:29 CST No sudden loss of generation greater than 450 MW occurred on April 10, 2019. Operational Information Active
Apr 10 2019 08:46:51 CST The Daily RSASM for Wednesday, April 10, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 10 2019 00:05:02 CST No sudden loss of generation greater than 450 MW occurred on April 9, 2019. Operational Information Active
Apr 10 2019 00:00:08 CST ERCOT has cancelled the following notice: The Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Cancelled
Apr 09 2019 23:47:59 CST ERCOT has cancelled the following notice: ERCOT has curtailed DC_R to 75MW export net due to contingency until further notice. Operational Information Cancelled
Apr 09 2019 20:42:42 CST DC Tie Curtailment Notice: The Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Active
Apr 09 2019 20:40:42 CST ERCOT has curtailed DC_R to 75MW export net due to contingency until further notice. Operational Information Active
Apr 09 2019 13:55:11 CST Notification of Market Price Correction: Market price correction for DAM. ERCOT has identified an issue with prices for DAM Operating Day 4/10/2019. ERCOT will correct DAM Price for Settlement Point HB_HUBAVG for hour ending 17:00 due to a software error. The error was limited to the HB_HUBAVG SPP in DAM and caused it to be slightly different from the simple average of the four ERCOT 345kV Hubs DASPPs. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 10:00 AM of 4/12/2019, Friday. Alert Active
Apr 09 2019 10:49:26 CST ERCOT has cancelled the following notice: At 10:34, ERCOT is conducting an unannounced Constant Frequency Control Test and has placed a QSE on Constant Frequency. Operational Information Cancelled
Apr 09 2019 10:46:23 CST ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Apr 09 2019 10:37:23 CST ERCOT Emergency Base Points are Enabled Operational Information Active
Apr 09 2019 10:28:33 CST At 10:34, ERCOT is conducting an unannounced Constant Frequency Control Test and has placed a QSE on Constant Frequency. Operational Information Active
Apr 09 2019 08:47:00 CST The Daily RSASM for Tuesday, April 9, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 09 2019 00:02:02 CST No sudden loss of generation greater than 450 MW occurred on April 8, 2019. Operational Information Active
Apr 08 2019 15:08:10 CST ERCOT has cancelled the following notice: The DC_R Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Cancelled
Apr 08 2019 14:53:53 CST Notification of Market Price Correction: Market price correction for DAM. ERCOT has identified an issue with prices for DAM Operating Day 4/9/2019. ERCOT will correct DAM Prices for Settlement Point HB_HUBAVG for hour ending 13:00 and 15:00 due to a software error. The error was limited to the HB_HUBAVG SPP in DAM and caused it to be slightly different from the simple average of the four ERCOT 345kV Hubs DASPPs. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 10:00 AM of 4/11/2019, Thursday. Alert Active
Apr 08 2019 14:22:23 CST DC Tie Curtailment Notice: The DC_R Railroad DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to one or more transmission security violations that would be fully or partially resolved by the curtailment of DC Tie Load. DC Tie Curtailment Notice Active
Apr 08 2019 08:46:44 CST The Daily RSASM for Monday, April 8, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 08 2019 00:00:09 CST No sudden loss of generation greater than 450 MW occurred on April 7, 2019. Operational Information Active
Apr 07 2019 19:32:05 CST DC Tie Outage: The Laredo DC Tie will be unavailable from 08:00 04/08/2019 through 16:00 04/19/2019 due to a planned outage. Operational Information Active
Apr 07 2019 09:30:55 CST ERCOT has cancelled the following notice: The DC_S DC Tie will be unavailable from 03:10 04/07/2019 through 10:00 04/07/2019 due to a forced outage. Operational Information Cancelled
Apr 07 2019 08:50:45 CST The Daily RSASM for Sunday, April 7, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 07 2019 03:23:40 CST DC Tie Outage: The DC_S DC Tie will be unavailable from 03:10 04/07/2019 through 10:00 04/07/2019 due to a forced outage. Operational Information Active
Apr 07 2019 03:07:35 CST The Railroad DC Tie will be derated to 150 MW beginning on 04/10 at 07:00 through 04/12 at 20:00 due to planned outage. Operational Information Active
Apr 07 2019 03:03:30 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie has been derated to 150 MW import/export on 04/10/19 @07:00 to 04/12/19 20:00 due to a planned work. Operational Information Cancelled
Apr 07 2019 00:26:38 CST No sudden loss of generation greater than 450 MW occurred on April 6, 2019. Operational Information Active
Apr 06 2019 14:03:11 CST ERCOT has been notified that the Railroad DC Tie has been derated to 150 MW import/export on 04/10/19 @07:00 to 04/12/19 20:00 due to a planned work. Operational Information Active
Apr 06 2019 14:00:29 CST ERCOT has cancelled the following notice: The Railroad DC Tie will be unavailable from 07:00 04/10/2019 through 20:00 04/12/2019 due to a planned outage. Operational Information Cancelled
Apr 06 2019 12:44:54 CST DC Tie Outage: The Railroad DC Tie will be unavailable from 07:00 04/10/2019 through 20:00 04/12/2019 due to a planned outage. Operational Information Active
Apr 06 2019 08:47:04 CST The Daily RSASM for Saturday, April 6, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 06 2019 00:12:46 CST No sudden loss of generation greater than 450 MW occurred on April 5, 2019. Operational Information Active
Apr 05 2019 16:11:11 CST ERCOT has cancelled the following notice: ERCOT has been notified that the Railroad DC Tie has been derated to 150 MW import/export due to a station outage until further notice. Operational Information Cancelled
Apr 05 2019 08:49:00 CST The Daily RSASM for Friday, April 5, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 05 2019 00:26:06 CST No sudden loss of generation greater than 450 MW occurred on April 4, 2019. Operational Information Active
Apr 04 2019 13:53:48 CST DAM is complete, DRUC will begin at 14:55 Operational Information Active
Apr 04 2019 13:31:14 CST ERCOT has postponed the deadline for the posting of the DAM Solution for Operating Day April 5, 2019 due to long running solution. Advisory Active
Apr 04 2019 08:47:32 CST The Daily RSASM Thursday, April 4, 2019 will not be occurring due to zero participating QSEs. Operational Information Active
Apr 04 2019 00:40:13 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 2350 for operating day April 4, 2019 for 2.2 MWs REGUP for HE3 - HE12. Operational Information Cancelled
Apr 04 2019 00:36:38 CST No sudden loss of generation greater than 450 MW occurred on April 3, 2019. Operational Information Active
Apr 03 2019 23:21:38 CST ERCOT will execute a SASM at 2350 for operating day April 4, 2019 for 2.2 MWs REGUP for HE3 - HE12. Operational Information Active
Apr 03 2019 20:40:17 CST ERCOT has cancelled the following notice: ERCOT will execute a SASM at 1945 for operating day April 4, 2019 for 9.9 MWs REGUP for HE13 - HE15. Operational Information Cancelled
Apr 03 2019 19:13:30 CST ERCOT will execute a SASM at 1945 for operating day April 4, 2019 for 9.9 MWs REGUP for HE13 - HE15. Operational Information Active
Apr 03 2019 15:51:37 CST Notification of Market Price Correction: Market price correction for DAM. ERCOT has identified an issue with prices for DAM Operating Day 4/4/2019. ERCOT will correct DAM Prices for Settlement Point HB_HUBAVG for hour ending 19:00 due to a software error. The error was limited to the HB_HUBAVG SPP in DAM and caused it to be slightly different from the simple average of the four ERCOT 345kV Hubs DASPPs. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 10:00 AM of 4/8/2019, Monday. Alert Active
Apr 03 2019 13:42:08 CST Notification of Market Price Correction: Market price correction for DAM. ERCOT has identified an issue with prices for DAM Operating Day 4/2/2019. ERCOT will correct DAM Prices for Settlement Point HB_HUBAVG for hour ending 19:00 due to a software error. The error is limited to the HB_HUBAVG SPP in the DAM and caused it to be slightly different from the simple average of four ERCOT 345kV Hubs DASPPs. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 10:00 AM of 4/4/2019, Thursday. Alert Active
Apr 03 2019 08:47:43 CST The Daily RSASM for Wednesday, April 3, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 03 2019 08:11:14 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for Spur/Salt Creek Reactor 138kv line outage. Operational Information Cancelled
Apr 03 2019 07:08:55 CST ERCOT is taking manual actions to pre-posture for Spur/Salt Creek Reactor 138kv line outage. Operational Information Active
Apr 03 2019 00:40:56 CST No sudden loss of generation greater than 450 MW occurred on April 2, 2019. Operational Information Active
Apr 02 2019 17:19:14 CST Notification of Market Price Correction: Market price correction for DAM. ERCOT has identified an issue with prices for DAM Operating Day 4/1/2019. ERCOT will correct DAM Prices for Settlement Point HB_HUBAVG for hour ending 10:00 and 15:00 due to a software error. The error is limited to the HB_HUBAVG SPP in the DAM and caused it to be slightly different from the simple average of the four ERCOT 345kV Hubs DASPPs. Complete price correction data will be posted on the Market Information System as soon as possible but no later than 10:00 AM of 4/3/2019, Wednesday. Alert Active
Apr 02 2019 08:46:51 CST The Daily RSASM for Tuesday, April 2, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 02 2019 08:12:19 CST ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for Spur/Salt Creek Reactor 138kv line outage. Operational Information Cancelled
Apr 02 2019 06:59:02 CST ERCOT is taking manual actions to pre-posture for Spur/Salt Creek Reactor 138kv line outage. Operational Information Active
Apr 02 2019 00:28:06 CST No sudden loss of generation greater than 450 MW occurred on April 1, 2019. Operational Information Active
Apr 01 2019 08:49:00 CST The Daily RSASM for Monday, April 1, 2019 will not be occurring due to zero participating QSEs Operational Information Active
Apr 01 2019 00:12:18 CST No sudden loss of generation greater than 450 MW occurred on March 31, 2019. Operational Information Active