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Operations Messages

This section contains important messages from the ERCOT Control Room. Refresh this screen to see current operation messages. 

Jun 2024 Jul 2024 Aug 2024 Sep 2024 Oct 2024 Nov 2024
Date & Time Notice Type Status
Jul 31, 2024 3:54:49 PM ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Jul 31, 2024 8:46:44 AM The Daily RSASM for 07/31/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 31, 2024 12:28:07 AM No sudden loss of generation greater than 450 MW occurred on July 30, 2024. Operational Information Active
Jul 30, 2024 8:47:23 AM The Daily RSASM for 07/30/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 30, 2024 1:03:46 AM No sudden loss of generation greater than 450 MW occurred on July 29, 2024. Operational Information Active
Jul 29, 2024 8:47:22 AM The Daily RSASM for 07/29/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 29, 2024 12:07:37 AM No sudden loss of generation greater than 450 MW occurred on July 28, 2024. Operational Information Active
Jul 28, 2024 8:46:14 AM The Daily RSASM for 07/28/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 28, 2024 12:05:19 AM No sudden loss of generation greater than 450 MW occurred on July 27, 2024. Operational Information Active
Jul 27, 2024 8:45:55 AM The Daily RSASM for 07/27/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 27, 2024 12:25:12 AM No sudden loss of generation greater than 450 MW occurred on July 26, 2024. Operational Information Active
Jul 26, 2024 8:45:54 AM The Daily RSASM for 07/26/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 26, 2024 12:04:42 AM No sudden loss of generation greater than 450 MW occurred on July 25, 2024. Operational Information Active
Jul 25, 2024 8:45:58 AM The Daily RSASM for 07/25/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 25, 2024 12:00:16 AM On 7/24/2024, a sudden loss of generation occurred at 07:02 totaling 1284 MW. Frequency declined to 59.872 Hz, ERCOT load was 49,131 MW. Operational Information Active
Jul 24, 2024 8:46:12 AM The Daily RSASM for 07/24/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 24, 2024 7:08:24 AM ERCOT ECRS HAS BEEN RECALLED Operational Information Cancelled
Jul 24, 2024 7:02:48 AM ERCOT ECRS HAS BEEN DEPLOYED Operational Information Active
Jul 24, 2024 12:32:40 AM On 7/23/2024, a sudden loss of generation occurred at 05:26 totaling 459 MW. Frequency declined to 59.946 Hz, ERCOT load was 47,109 MW. Operational Information Active
Jul 23, 2024 8:47:09 AM The Daily RSASM for 07/23/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 23, 2024 12:01:48 AM No sudden loss of generation greater than 450 MW occurred on July 22, 2024. Operational Information Active
Jul 22, 2024 11:27:07 PM ERCOT has cancelled the following notice: ERCOT is taking manual actions to pre-posture for a 138 KV outage in the Corpus Christi area. Operational Information Cancelled
Jul 22, 2024 9:47:47 PM ERCOT is taking manual actions to pre-posture for a 138 KV outage in the Corpus Christi area. Operational Information Active
Jul 22, 2024 9:31:11 PM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 20:50 for operating day 07/22/2024 for 38 MW ECRS HE 23-07. Operational Information Cancelled
Jul 22, 2024 8:14:47 PM ERCOT will execute a SASM at 20:50 for operating day 07/22/2024 for 38 MW ECRS HE 23-07. Operational Information Active
Jul 22, 2024 10:03:57 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at 09:45 for operating day 07/22/24 this is for ECRS for HE 13-22 1 MWs per hour and RRSPF for HE 23-24 1.6 MWs per hour. Operational Information Cancelled
Jul 22, 2024 9:19:39 AM ERCOT will execute a SASM at 09:45 for operating day 07/22/24 this is for ECRS for HE 13-22 1 MWs per hour and RRSPF for HE 23-24 1.6 MWs per hour. Operational Information Active
Jul 22, 2024 8:46:45 AM The Daily RSASM for 07/22/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 22, 2024 3:13:47 AM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 07/22/2024 07:00 through 07/22/2024 14:00 due to a planned outage. Operational Information Cancelled
Jul 22, 2024 12:03:31 AM No sudden loss of generation greater than 450 MW occurred on July 21, 2024. Operational Information Active
Jul 21, 2024 8:46:23 AM The Daily RSASM for 07/21/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 21, 2024 12:02:16 AM No sudden loss of generation greater than 450 MW occurred on July 20, 2024. Operational Information Active
Jul 20, 2024 8:46:01 AM The Daily RSASM for 07/20/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 20, 2024 12:21:55 AM No sudden loss of generation greater than 450 MW occurred on July 19, 2024. Operational Information Active
Jul 19, 2024 6:30:55 PM ERCOT has cancelled the following notice: At 3:25 PM on 07/19/2024, ERCOT will perform site failover of its Energy & Market Management Systems. During this time, market communications will be unavailable for about 20 minutes, and real-time communications will be unavailable for about 5 minutes. All systems should re-establish communications automatically. This event will be preceded by a "hot line" call shortly before beginning. Operational Information Cancelled
Jul 19, 2024 6:25:42 PM Market price correction for SCED. ERCOT has identified a need to perform a price correction for Real-Time Settlement Interval 16:00 on Operating Day 7/18/2024. This was due to Emergency Basepoints being automatically activated during scheduled system maintenance. ERCOT has determined that the impact to Real-Time Meter Prices (RTRMPRs) meets criteria for price correction in accordance with ERCOT Protocol Section 6.3(5). Corrections to RTRMPRs will be finished by 16:00 on 07/22/2024. Since ERCOT does not post price corrections for RTRMPRs, this price correction will be reflected on the settlement statements of the impacted QSEs. Alert Active
Jul 19, 2024 12:14:28 PM At 3:25 PM on 07/19/2024, ERCOT will perform site failover of its Energy & Market Management Systems. During this time, market communications will be unavailable for about 20 minutes, and real-time communications will be unavailable for about 5 minutes. All systems should re-establish communications automatically. This event will be preceded by a "hot line" call shortly before beginning. Operational Information Active
Jul 19, 2024 10:44:13 AM ERCOT extended the deadline for DAM submissions for Operating Day July 20, 2024 until 12PM to allow more time for QSEs to submit DAM transactions in case they have been impacted by nationwide IT issues. Operational Information Active
Jul 19, 2024 8:46:24 AM The Daily RSASM for 07/19/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 19, 2024 5:34:48 AM ERCOT has cancelled the following notice: ERCOT will be conducting a SASM as of 0510 for 7/19/2024 for [RRS]: HE [7 – 15] MW [ 7 MW all hours]. Operational Information Cancelled
Jul 19, 2024 4:43:30 AM ERCOT has cancelled the following notice: ERCOT will be conducting a SASM as of 0510 for 7/19/2024 for [RRS]: HE [7 – 15] MW [ 7 MW all hours]. Operational Information Cancelled
Jul 19, 2024 4:39:21 AM ERCOT will be conducting a SASM as of 0510 for 7/19/2024 for [RRS]: HE [7 – 15] MW [ 7 MW all hours]. Operational Information Active
Jul 19, 2024 4:39:21 AM ERCOT will be conducting a SASM as of 0510 for 7/19/2024 for [RRS]: HE [7 – 15] MW [ 7 MW all hours]. Operational Information Active
Jul 19, 2024 12:10:23 AM No sudden loss of generation greater than 450 MW occurred on July 18, 2024. Operational Information Active
Jul 18, 2024 5:03:38 PM ERCOT has cancelled the following notice: At 3:25 PM on 07/18/2024, ERCOT will perform site failover of its Energy & Market Management Systems. During this time, market communications will be unavailable for about 20 minutes, and real-time communications will be unavailable for about 5 minutes. All systems should re-establish communications automatically. This event will be preceded by a "hot line" call shortly before beginning. Operational Information Cancelled
Jul 18, 2024 3:59:54 PM ERCOT ECRS HAS BEEN RECALLED Operational Information Cancelled
Jul 18, 2024 3:58:10 PM ERCOT Emergency Base Points are Disabled Operational Information Cancelled
Jul 18, 2024 3:54:18 PM ERCOT ECRS HAS BEEN DEPLOYED Operational Information Active
Jul 18, 2024 3:42:17 PM ERCOT Emergency Base Points are Enabled Operational Information Active
Jul 18, 2024 9:15:50 AM At 3:25 PM on 07/18/2024, ERCOT will perform site failover of its Energy & Market Management Systems. During this time, market communications will be unavailable for about 20 minutes, and real-time communications will be unavailable for about 5 minutes. All systems should re-establish communications automatically. This event will be preceded by a "hot line" call shortly before beginning. Operational Information Active
Jul 18, 2024 8:46:31 AM The Daily RSASM for 07/18/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 18, 2024 8:20:23 AM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 07/18/2024 08:02 through 07/18/2024 12:00 due to a forced outage. Operational Information Cancelled
Jul 18, 2024 8:17:43 AM The DC_E (East) DC Tie will be unavailable from 07/18/2024 08:02 through 07/18/2024 12:00 due to a forced outage. Operational Information Active
Jul 18, 2024 12:36:04 AM No sudden loss of generation greater than 450 MW occurred on July 17, 2024. Operational Information Active
Jul 17, 2024 9:58:03 AM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 07/17/2024 08:00 through 07/17/2024 11:00 due to a planned outage. Operational Information Cancelled
Jul 17, 2024 8:45:53 AM The Daily RSASM for 07/17/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 17, 2024 12:01:35 AM No sudden loss of generation greater than 450 MW occurred on July 16, 2024. Operational Information Active
Jul 16, 2024 12:52:35 PM The DC_L (Laredo VFT) DC Tie will be unavailable from 07/22/2024 07:00 through 07/22/2024 14:00 due to a planned outage. Operational Information Active
Jul 16, 2024 8:45:58 AM The Daily RSASM for 07/16/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 16, 2024 12:18:20 AM No sudden loss of generation greater than 450 MW occurred on July 15, 2024. Operational Information Active
Jul 15, 2024 8:54:53 PM At 20:54, All Non-Spin has been recalled. Operational Information Active
Jul 15, 2024 8:54:02 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 0.0, BEGIN_TIME: 2024-07-15 20:54:02, END_TIME: 2024-07-15 20:54:02, DURATION: 0 Hrs 0 Mins.; Operational Information
Jul 15, 2024 7:39:35 PM At 19:37 approximately 633 MW of Non-Spin has been deployed, anticipated duration is 23:59. Operational Information Active
Jul 15, 2024 7:37:36 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 632.5, BEGIN_TIME: 2024-07-15 19:37:36, END_TIME: 2024-07-15 23:59:01, DURATION: 4 Hrs 21 Mins.; Operational Information
Jul 15, 2024 7:31:53 PM CM-ASM-NOTF AS_TYPE: Non-Spin, DEPLOY_MW: 549.3, BEGIN_TIME: 2024-07-15 19:31:53, END_TIME: 2024-07-15 20:00:00, DURATION: 0 Hrs 28 Mins.; Operational Information
Jul 15, 2024 5:15:35 PM The DC_E (East) DC Tie will be unavailable from 07/17/2024 08:00 through 07/17/2024 11:00 due to a planned outage. Operational Information Active
Jul 15, 2024 5:13:59 PM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 07/17/2024 07:00 through 07/17/2024 11:00 due to a planned outage. Operational Information Cancelled
Jul 15, 2024 8:49:59 AM The Daily RSASM for 07/15/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 15, 2024 12:01:49 AM No sudden loss of generation greater than 450 MW occurred on July 14, 2024. Operational Information Active
Jul 14, 2024 8:47:56 AM The Daily RSASM for 07/14/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 14, 2024 12:01:05 AM No sudden loss of generation greater than 450 MW occurred on July 13, 2024. Operational Information Active
Jul 13, 2024 8:57:21 AM The Daily RSASM for 07/13/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 13, 2024 12:00:48 AM No sudden loss of generation greater than 450 MW occurred on July 12, 2024. Operational Information Active
Jul 12, 2024 8:49:29 AM The Daily RSASM for 07/12/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 12, 2024 3:56:02 AM 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
Jul 12, 2024 3:55:51 AM ERCOT will be working from the primary control center until further notice, use the OPX numbers for Taylor. Operational Information Active
Jul 12, 2024 12:02:47 AM No sudden loss of generation greater than 450 MW occurred on July 11, 2024. Operational Information Active
Jul 11, 2024 4:00:09 PM ERCOT will be working from the alternate control center until further notice, use the OPX numbers for Bastrop. Operational Information Active
Jul 11, 2024 8:49:54 AM The Daily RSASM for 07/11/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 11, 2024 12:10:42 AM No sudden loss of generation greater than 450 MW occurred on July 10, 2024. Operational Information Active
Jul 10, 2024 1:01:13 PM The DC_E (East) DC Tie will be unavailable from 07/17/2024 07:00 through 07/17/2024 11:00 due to a planned outage. Operational Information Active
Jul 10, 2024 8:52:42 AM The Daily RSASM for 07/10/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 10, 2024 12:02:26 AM No sudden loss of generation greater than 450 MW occurred on July 9, 2024. Operational Information Active
Jul 9, 2024 8:47:25 AM The Daily RSASM for 07/09/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 9, 2024 1:56:34 AM ERCOT has cancelled the following notice: ERCOT will execute a SASM at [0140] for operating day 07/09/2024 for RRS for HE07 36.4MW, HE08 41.3MW, HE09 36.4MW. Operational Information Cancelled
Jul 9, 2024 1:04:23 AM ERCOT will execute a SASM at [0140] for operating day 07/09/2024 for RRS for HE07 36.4MW, HE08 41.3MW, HE09 36.4MW. Operational Information Active
Jul 9, 2024 12:09:07 AM No sudden loss of generation greater than 450 MW occurred on July 8, 2024. Operational Information Active
Jul 8, 2024 9:00:38 PM ERCOT has cancelled the following notice: At 12:00, ERCOT is issuing an OCN for Hurricane Beryl due to a possibility of making landfall or impacting the ERCOT Region on Sunday July 7, 2024. OCN Cancelled
Jul 8, 2024 9:00:30 PM ERCOT has cancelled the following notice: At 10:00, ERCOT is issuing an Advisory for Hurricane Beryl due to a possibility of making landfall or impacting the ERCOT Region on Sunday July 7, 2024. Advisory Cancelled
Jul 8, 2024 9:00:17 PM ERCOT has cancelled the following notice: At 12:00, ERCOT is issuing a Watch for Tropical Storm Beryl in the Gulf of Mexico which is expected to intensify into a Hurricane and have an adverse impact or make landfall within the ERCOT Region between Corpus Christi and Galveston on Sunday July 7, 2024. Watch Cancelled
Jul 8, 2024 9:00:06 PM ERCOT has cancelled the following notice: At 03:30, ERCOT is issuing an Emergency Notice due to Hurricane Beryl having an adverse impact on the ERCOT transmission system. Emergency Notice Cancelled
Jul 8, 2024 7:53:17 PM ERCOT has cancelled the following notice: The DC_E (East) DC Tie will be unavailable from 07/09/2024 08:00 through 07/09/2024 11:00 due to a planned outage. Operational Information Cancelled
Jul 8, 2024 4:08:48 PM ERCOT has been notified that the Laredo DC Tie has been derated to 70 MW Import/Export due to equipment issues until further notice. Operational Information Active
Jul 8, 2024 4:06:49 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/10/2024 16:00 due to a forced outage. Operational Information Cancelled
Jul 8, 2024 4:06:32 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage DC Tie Curtailment Notice Cancelled
Jul 8, 2024 4:05:59 PM ERCOT has cancelled the following notice: ERCOT has been notified that the Laredo DC Tie has been derated to 66 MW Import/Export due to equipment issues until further notice. Operational Information Cancelled
Jul 8, 2024 10:33:39 AM ERCOT has cancelled the following notice: ERCOT will be conducting as SASM as 0950 for 7/8/2024 for [ECRS]: HE [13 – 14, 16-19, 21-24] MW [50 MW all hours]. for [NONSPIN]: HE [14 and 24] MW [27 MW All Hours]. for [REGUP]: HE [12, 15, 17, 20, 21, 23] MW [6.8], [25], [44.10] , [80] , [6.3] , [37.5]. for [RRS]: HE [18, 19, 21, 22] MW [10], [40], [33.7] , [40]. Operational Information Cancelled
Jul 8, 2024 9:20:53 AM ERCOT will be conducting as SASM as 0950 for 7/8/2024 for [ECRS]: HE [13 – 14, 16-19, 21-24] MW [50 MW all hours]. for [NONSPIN]: HE [14 and 24] MW [27 MW All Hours]. for [REGUP]: HE [12, 15, 17, 20, 21, 23] MW [6.8], [25], [44.10] , [80] , [6.3] , [37.5]. for [RRS]: HE [18, 19, 21, 22] MW [10], [40], [33.7] , [40]. Operational Information Active
Jul 8, 2024 8:49:17 AM The Daily RSASM for 07/08/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 8, 2024 3:30:28 AM At 03:30, ERCOT is issuing an Emergency Notice due to Hurricane Beryl having an adverse impact on the ERCOT transmission system. Emergency Notice Active
Jul 8, 2024 12:28:20 AM No sudden loss of generation greater than 450 MW occurred on July 7, 2024. Operational Information Active
Jul 7, 2024 9:42:34 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/08/2024 16:00 due to a forced outage. Operational Information Cancelled
Jul 7, 2024 9:42:16 PM The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/10/2024 16:00 due to a forced outage. Operational Information Active
Jul 7, 2024 3:56:07 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/07/2024 23:59 due to a forced outage. Operational Information Cancelled
Jul 7, 2024 3:55:45 PM The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/08/2024 16:00 due to a forced outage. Operational Information Active
Jul 7, 2024 8:47:10 AM The Daily RSASM for 07/07/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 7, 2024 12:19:43 AM No sudden loss of generation greater than 450 MW occurred on July 6, 2024. Operational Information Active
Jul 6, 2024 11:54:30 PM The DC_L (Laredo VFT) DC Tie will be unavailable from 07/06/2024 23:53 through 07/07/2024 23:59 due to a forced outage. Operational Information Active
Jul 6, 2024 11:52:15 PM The DC_L (Laredo VFT) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage DC Tie Curtailment Notice Active
Jul 6, 2024 12:02:17 PM At 12:00, ERCOT is issuing a Watch for Tropical Storm Beryl in the Gulf of Mexico which is expected to intensify into a Hurricane and have an adverse impact or make landfall within the ERCOT Region between Corpus Christi and Galveston on Sunday July 7, 2024. Watch Active
Jul 6, 2024 8:47:01 AM The Daily RSASM for 07/06/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 6, 2024 12:27:04 AM No sudden loss of generation greater than 450 MW occurred on July 5, 2024. Operational Information Active
Jul 5, 2024 10:01:07 AM At 10:00, ERCOT is issuing an Advisory for Hurricane Beryl due to a possibility of making landfall or impacting the ERCOT Region on Sunday July 7, 2024. Advisory Active
Jul 5, 2024 8:47:08 AM The Daily RSASM for 07/05/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 5, 2024 12:00:44 AM No sudden loss of generation greater than 450 MW occurred on July 4, 2024. Operational Information Active
Jul 4, 2024 8:47:14 AM The Daily RSASM for 07/04/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 4, 2024 12:01:23 AM No sudden loss of generation greater than 450 MW occurred on July 3, 2024. Operational Information Active
Jul 3, 2024 12:00:06 PM At 12:00, ERCOT is issuing an OCN for Hurricane Beryl due to a possibility of making landfall or impacting the ERCOT Region on Sunday July 7, 2024. OCN Active
Jul 3, 2024 8:51:33 AM The Daily RSASM for 07/03/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 3, 2024 1:20:16 AM No sudden loss of generation greater than 450 MW occurred on July 2, 2024. Operational Information Active
Jul 2, 2024 4:03:29 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie will be unavailable from 06/25/2024 04:05 through 07/08/2024 16:00 due to a forced outage. Operational Information Cancelled
Jul 2, 2024 4:03:13 PM ERCOT has cancelled the following notice: The DC_L (Laredo VFT) DC Tie is being curtailed, a DC Tie Curtailment Notice (DCTCN) is active due to a planned or unplanned outage DC Tie Curtailment Notice Cancelled
Jul 2, 2024 11:05:19 AM The DC_E (East) DC Tie will be unavailable from 07/09/2024 08:00 through 07/09/2024 11:00 due to a planned outage. Operational Information Active
Jul 2, 2024 8:47:50 AM The Daily RSASM for 07/02/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 2, 2024 12:22:42 AM No sudden loss of generation greater than 450 MW occurred on July 1, 2024. Operational Information Active
Jul 1, 2024 8:53:17 AM The Daily RSASM for 07/01/2024 will not be occurring due to zero participating QSEs. Operational Information Active
Jul 1, 2024 12:03:04 AM No sudden loss of generation greater than 450 MW occurred on June 30, 2024. Operational Information Active