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.
| Date | Message | Type | Status |
|---|---|---|---|
| Feb 23 2020 08:46:19 CST | The Daily RSASM for Sunday, February 23, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 23 2020 00:07:20 CST | No sudden loss of generation greater than 450 MW occurred on February 22, 2020 | Operational Information | Active |
| Feb 22 2020 08:46:37 CST | The Daily RSASM for Saturday, February 22, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 22 2020 01:09:52 CST | No sudden loss of generation greater than 450 MW occurred on February 21, 2020 | Operational Information | Active |
| Feb 21 2020 08:46:15 CST | The Daily RSASM for Friday, February 21, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 21 2020 00:01:07 CST | No sudden loss of generation greater than 450 MW occurred on February 20, 2020. | Operational Information | Active |
| Feb 20 2020 13:38:08 CST | ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for Bluff Creek 345KV North bus outage. | Operational Information | Cancelled |
| Feb 20 2020 12:29:02 CST | ERCOT is taking manual actions to pre-posture for Bluff Creek 345KV North bus outage. | Operational Information | Active |
| Feb 20 2020 08:51:56 CST | The Daily RSASM for Thursday, February 20, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 20 2020 00:00:13 CST | No sudden loss of generation greater than 450 MW occurred on February 19, 2020. | Operational Information | Active |
| Feb 19 2020 08:47:14 CST | The Daily RSASM for Wednesday February 19, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 19 2020 08:25:53 CST | ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for 345kv line MOSSW to ODEHV 34600_A outage. | Operational Information | Cancelled |
| Feb 19 2020 07:31:43 CST | ERCOT is taking manual actions to pre-posture for 345kv line MOSSW to ODEHV 34600_A outage. | Operational Information | Active |
| Feb 19 2020 04:45:03 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 |
| Feb 19 2020 03:32:36 CST | ERCOT will execute a SASM at 04:05 for operating day Wednesday, February 19, 2020 for 20 MW RRS and 40MW NSPIN for each hour HE09 through HE24 and 5mw REGUP for HE19. | Operational Information | Active |
| Feb 19 2020 00:28:38 CST | ERCOT will execute a SASM at 01:15 for operating day Wednesday, February 19, 2020 for 20 MW RRS and 55MW NSPIN for each hour HE04 through HE08 and 5mw REGUP for HE07. | Operational Information | Active |
| Feb 19 2020 00:00:52 CST | No sudden loss of generation greater than 450 MW occurred on February 18, 2020. | Operational Information | Active |
| Feb 18 2020 15:52:36 CST | Eagle Pass DC Tie and DC-EGPS (DC_EGPS) 138 kV Block Load Transfer (138 kV CB 3000)will be unavailable on Monday 02/24/20 at 08:30 until Wednesday16:00 for CFE clearance on the Piedras Negras to Eagle Pass circuit. | Operational Information | Active |
| Feb 18 2020 08:50:12 CST | The Daily RSASM for Tuesday February 18, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 18 2020 00:00:06 CST | No sudden loss of generation greater than 450 MW occurred on February 17, 2020. | Operational Information | Active |
| Feb 17 2020 08:54:36 CST | The Daily RSASM will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 17 2020 00:11:15 CST | No sudden loss of generation greater than 450 MW occurred on February 16, 2020. | Operational Information | Active |
| Feb 16 2020 08:53:04 CST | The Daily RSASM for Sunday, February 16, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 16 2020 00:18:02 CST | No sudden loss of generation greater than 450 MW occurred on February 15, 2020. | Operational Information | Active |
| Feb 15 2020 08:48:21 CST | The Daily RSASM for Saturday, February 15, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 15 2020 00:39:07 CST | No sudden loss of generation greater than 450 MW occurred on February 14, 2020. | Operational Information | Active |
| Feb 14 2020 08:47:07 CST | The Daily RSASM for Friday, February 14, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 14 2020 00:04:17 CST | No sudden loss of generation greater than 450 MW occurred on February 13, 2020. | Operational Information | Active |
| Feb 13 2020 08:47:32 CST | The Daily RSASM for Thursday, February 13, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 13 2020 00:13:08 CST | No sudden loss of generation greater than 450 MW occurred on February 12, 2020. | Operational Information | Active |
| Feb 12 2020 16:51:37 CST | ERCOT has cancelled the following notice: ERCOT will execute a SASM at 01:35 for operating day 02/12/2020 for HE07 for 42 MW RRS and HE08 14 MW RRS. | Operational Information | Cancelled |
| Feb 12 2020 08:47:41 CST | The Daily RSASM for Wednesday, February 12, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 12 2020 01:10:41 CST | ERCOT will execute a SASM at 01:35 for operating day 02/12/2020 for HE07 for 42 MW RRS and HE08 14 MW RRS. | Operational Information | Active |
| Feb 12 2020 00:55:00 CST | No sudden loss of generation greater than 450 MW occurred on February 11, 2020. | Operational Information | Active |
| Feb 11 2020 12:33:47 CST | Frequency Measurable Events: Report tracking Frequency Measurable Events (FMEs) as of Feb 10, 2020 is available. | Operational Instruction | Active |
| Feb 11 2020 08:46:02 CST | The Daily RSASM for Tuesday, February 11, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 11 2020 03:35:51 CST | ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:05 for operating day 02/11/2020 for HE 0700, 0800, 0900, 1000 for RRS MW 35, 7, 21, 7 | Operational Information | Cancelled |
| Feb 11 2020 01:39:16 CST | ERCOT will execute a SASM at 02:05 for operating day 02/11/2020 for HE 0700, 0800, 0900, 1000 for RRS MW 35, 7, 21, 7 | Operational Information | Active |
| Feb 11 2020 00:31:16 CST | On 02/10/2020, a sudden loss of generation occurred at 16:07 totaling 511 MW. Frequency declined to 59.860 Hz, ERCOT load was 43, 925 MW. | Operational Information | Active |
| Feb 10 2020 16:13:39 CST | ERCOT Responsive Reserve Has Been Recalled | Operational Information | Cancelled |
| Feb 10 2020 16:07:07 CST | ERCOT Responsive Reserve Has Been Deployed | Operational Information | Active |
| Feb 10 2020 08:46:14 CST | The Daily RSASM for Monday, February 10, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 10 2020 00:13:28 CST | No sudden loss of generation greater than 450 MW occurred on February 9, 2020. | Operational Information | Active |
| Feb 09 2020 08:45:57 CST | The Daily RSASM for Sunday, February 9, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 09 2020 00:00:06 CST | No sudden loss of generation greater than 450 MW occurred on February 8, 2020. | Operational Information | Active |
| Feb 08 2020 08:48:33 CST | The Daily RSASM for Saturday February 8, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 08 2020 00:20:33 CST | No sudden loss of generation greater than 450 MW occurred on February 7, 2020. | Operational Information | Active |
| Feb 07 2020 08:47:06 CST | The Daily RSASM for Friday February 7, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 07 2020 04:31:11 CST | ERCOT is working from primary control center. | Operational Information | Active |
| Feb 07 2020 04:30:08 CST | ERCOT has cancelled the following notice: ERCOT will operating from back up control center until further notice. | Operational Information | Cancelled |
| Feb 07 2020 04:30:04 CST | ERCOT has cancelled the following notice: ERCOT will operating from back up control center until further notice. | Operational Information | Cancelled |
| Feb 07 2020 00:06:36 CST | On 02/6/2020, a sudden loss of generation occurred at 01:16 totaling 595 MW. Frequency declined to 59.904 Hz, ERCOT load was 45, 100 MW. Another sudden loss of generation occurred at 21:23 totaling 624 MW. Frequency declined to 59.863 Hz, ERCOT load was 47, 972 MW. | Operational Information | Active |
| Feb 06 2020 21:29:31 CST | ERCOT Responsive Reserve Has Been Recalled | Operational Information | Cancelled |
| Feb 06 2020 21:22:59 CST | ERCOT Responsive Reserve Has Been Deployed | Operational Information | Active |
| Feb 06 2020 17:24:29 CST | ERCOT will operating from back up control center until further notice. | Operational Information | Active |
| Feb 06 2020 14:04:36 CST | Notification of Prices Under Investigation: Notification of DAM prices under investigation. Update: ERCOT has completed its investigation of DAM prices for Operating Day 02/06/2020, and has concluded that no corrections are warranted. Prices will become final at 10 AM on 02/10/2020. | Alert | Active |
| Feb 06 2020 08:48:07 CST | The Daily RSASM for Thursday February 6, 2020 will not be occurring due to zero participating QSEs. | Operational Information | Active |
| Feb 06 2020 08:24:13 CST | ERCOT has cancelled the following notice: The Eagle Pass 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 |
| Feb 06 2020 07:03:45 CST | DC Tie Curtailment Notice: The Eagle Pass 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 |
| Feb 06 2020 01:20:16 CST | ERCOT Responsive Reserve Has Been Recalled | Operational Information | Cancelled |
| Feb 06 2020 01:16:24 CST | ERCOT Responsive Reserve Has Been Deployed | Operational Information | Active |
| Feb 06 2020 00:19:12 CST | No sudden loss of generation greater than 450 MW occurred on February 5, 2020. | Operational Information | Active |
| Feb 05 2020 15:50:21 CST | Notification of Prices Under Investigation: Notification of DAM prices under investigation. ERCOT has identified a potentially incorrect Resource RRS limit used for DAM for Operating Day 02/06/2020. ERCOT is evaluating the facts, and the impact on prices, if any, is still under investigation. ERCOT will send an update as soon as the investigation is complete. If a price correction is needed, corrected prices will be posted no later than 10 AM on 02/10/2020. | Alert | Active |
| Feb 05 2020 08:51:27 CST | The Daily RSASM for Wednesday February 5, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 05 2020 02:46:46 CST | ERCOT will execute a SASM at 03:15 for operating day Wednesday, 02/05/2020 for 56 MW RRS for HE06. | Operational Information | Active |
| Feb 05 2020 01:14:09 CST | No sudden loss of generation greater than 450 MW occurred on February 4, 2020. | Operational Information | Active |
| Feb 05 2020 01:03:18 CST | No sudden loss of generation greater than 450 MW occurred on February 4, 2020. | Operational Information | Active |
| Feb 04 2020 15:31:33 CST | DAM is complete, DRUC will begin at 16:22 | Operational Information | Active |
| Feb 04 2020 13:25:15 CST | ERCOT has postponed the deadline for the posting of the DAM Solution for Operating Day February 5, 2020 due to long solution time. | Advisory | Active |
| Feb 04 2020 09:01:13 CST | ERCOT has cancelled the following notice: At 0705 ERCOT is issuing a Transmission Emergency for the far West Area to commit EMR PBSES generation | Operational Information | Cancelled |
| Feb 04 2020 08:48:13 CST | The Daily RSASM for Tuesday February 4, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 04 2020 07:12:37 CST | At 0705 ERCOT is issuing a Transmission Emergency for the far West Area to commit EMR PBSES generation | Operational Information | Active |
| Feb 04 2020 02:40:59 CST | No sudden loss of generation greater than 450 MW occurred on February 3, 2020. | Operational Information | Active |
| Feb 04 2020 02:40:20 CST | No sudden loss of generation greater than 450 MW occurred on February 4, 2020. | Operational Information | Active |
| Feb 03 2020 15:00:03 CST | ERCOT has cancelled the following notice: The Notification to be executed at 11:40 SASAM was cancelled | Operational Information | Cancelled |
| Feb 03 2020 13:58:46 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2020-02-03 13:58:45, END_TIME: 2020-02-03 13:58:45, DURATION: 0 Hrs 0 Mins.; | Market Message | |
| Feb 03 2020 13:35:02 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 14:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 9 Hrs 0 Mins.; | Market Message | |
| Feb 03 2020 13:30:20 CST | The Notification to be executed at 11:40 SASAM was cancelled | Operational Information | Active |
| Feb 03 2020 12:45:28 CST | ERCOT has cancelled the following notice: ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW | Operational Information | Cancelled |
| Feb 03 2020 12:44:01 CST | ERCOT has cancelled the following notice: ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW | Operational Information | Cancelled |
| Feb 03 2020 12:35:02 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 13:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 10 Hrs 0 Mins.; | Market Message | |
| Feb 03 2020 11:35:02 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 12:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 11 Hrs 0 Mins.; | Market Message | |
| Feb 03 2020 11:15:26 CST | ERCOT will be executing a SASM for failure to provide @11:40 REGDN HR 14-4.4MW, 15-4.4MW REGUO HR 13-5.2MW, 14-8.10MW, 15-8.10MW, 16-5.2MW, 17-4.8MW, 18-4.8MW, 19-8.8MW, 20 8.8MW, 21-8.8MW | Operational Information | Active |
| Feb 03 2020 11:00:48 CST | ERCOT has cancelled the following notice: ERCOT will execute a SASM at 02:40 for operating day 02/03/2020 for HE 6-12. REGUP HE 06-11 8.8 MWs, REGUP HE 12 7.1 MWs and REGDN HE 10 3.3 MWs. | Operational Information | Cancelled |
| Feb 03 2020 10:35:02 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 11:00:00, END_TIME: 2020-02-03 23:00:00, DURATION: 12 Hrs 0 Mins.; | Market Message | |
| Feb 03 2020 09:35:01 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 09:32:58, END_TIME: 2020-02-03 23:00:00, DURATION: 13 Hrs 27 Mins.; | Market Message | |
| Feb 03 2020 09:32:58 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 09:32:58, END_TIME: 2020-02-03 23:00:00, DURATION: 13 Hrs 27 Mins.; | Market Message | |
| Feb 03 2020 09:00:01 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2020-02-03 09:00:01, END_TIME: 2020-02-03 09:00:01, DURATION: 0 Hrs 0 Mins. ; | Market Message | |
| Feb 03 2020 08:55:59 CST | CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 145.0, BEGIN_TIME: 2020-02-03 08:55:59, END_TIME: 2020-02-03 09:00:00, DURATION: 0 Hrs 4 Mins.; | Market Message | |
| Feb 03 2020 08:48:19 CST | The Daily RSASM for Monday February 3, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 03 2020 02:09:17 CST | ERCOT will execute a SASM at 02:40 for operating day 02/03/2020 for HE 6-12. REGUP HE 06-11 8.8 MWs, REGUP HE 12 7.1 MWs and REGDN HE 10 3.3 MWs. | Operational Information | Active |
| Feb 03 2020 00:18:45 CST | No sudden loss of generation greater than 450 MW occurred on February 2, 2020. | Operational Information | Active |
| Feb 02 2020 08:45:58 CST | The Daily RSASM for Sunday February 2, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 02 2020 00:52:18 CST | No sudden loss of generation greater than 450 MW occurred on February 1, 2020. | Operational Information | Active |
| Feb 01 2020 08:46:40 CST | The Daily RSASM for Saturday February 1, 2020 will not be occurring due to zero participating QSEs | Operational Information | Active |
| Feb 01 2020 00:03:05 CST | No sudden loss of generation greater than 450 MW occurred on January 31, 2020. | Operational Information | Active |