Electric Power Monthly

Data for June 2017  |  Release Date: August 24, 2017  |  Next Release: September 26, 2017 
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SAS Output
Table B.1 Major Disturbances and Unusual Occurrences, Year-to-Date 2017

Year Month Event Date and Time Restoration Date and Time Duration Utility/Power Pool NERC Region Area Affected Type of Disturbance Loss (megawatts) Number of Customers Affected
2017 1 01/08/2017 9:07 AM 01/13/2017 2:30 PM 125 Hours, 23 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 106000
2017 1 01/08/2017 11:59 PM ongoing ongoing California Department of Water Resources WECC California: Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 0 0
2017 1 01/10/2017 7:30 PM 01/13/2017 2:30 PM 67 Hours, 0 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 87000
2017 1 01/15/2017 6:35 AM 01/15/2017 7:44 AM 1 Hours, 9 Minutes Los Angeles Department of Water & Power WECC California: Los Angeles County; Loss of electric service to more than 50,000 customers for 1 hour or more-Transmission Disruption 176 126000
2017 1 01/15/2017 9:27 AM 01/17/2017 1:58 AM 40 Hours, 31 Minutes Oklahoma Municipal Power Authority SPP Oklahoma: Harper County; Electrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system-Severe Weather 1 788
2017 1 01/18/2017 6:05 PM 01/19/2017 12:05 AM 6 Hours, 0 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 75000
2017 1 01/22/2017 4:15 AM 01/24/2017 2:00 PM 57 Hours, 45 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 97 64000
2017 1 01/22/2017 6:00 AM ongoing ongoing California Department of Water Resources WECC California: Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 0 0
2017 1 01/22/2017 4:00 PM 01/23/2017 3:26 AM 11 Hours, 26 Minutes Southern Company SERC Alabama: Georgia: Mississippi: Florida: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 100 29965
2017 2 02/02/2017 1:04 AM 02/02/2017 5:00 AM 3 Hours, 56 Minutes Public Service Company of New Mexico WECC New Mexico: Bernalillo County, Santa Fe County; Uncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident-Transmission Interruption 396 149223
2017 2 02/02/2017 1:11 AM ongoing ongoing Peak Reliability WECC New Mexico: Bernalillo County; Uncontrolled loss of 300 Megawatts or more of firm system loads for more than 15 minutes from a single incident-Transmission Interruption 400 Unknown
2017 2 02/13/2017 1:00 PM 02/15/2017 1:35 PM 48 Hours, 35 Minutes North Carolina Mun Power Agny #1 SERC North Carolina: Union County; Physical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems-Vandalism 0 0
2017 2 02/17/2017 8:09 AM 02/22/2017 7:30 PM 131 Hours, 21 Minutes Pacific Gas & Electric Co WECC California: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 254 169250
2017 2 02/17/2017 1:00 PM 02/17/2017 1:15 PM 0 Hours, 15 Minutes Nevada Power Company d/b/a NV Energy WECC Nevada: Clark County; Physical attack that could potentially impact electric power system adequacy or reliability; or vandalism which targets components of any security systems-Vandalism 0 0
2017 2 02/17/2017 3:00 PM 02/20/2017 11:00 AM 68 Hours, 0 Minutes LADWP WECC California: Los Angeles County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 111591
2017 3 03/01/2017 8:30 AM 03/01/2017 2:00 PM 5 Hours, 30 Minutes Tennessee Valley Authority SERC Tennessee: Kentucky: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 58000
2017 3 03/01/2017 11:49 AM 03/02/2017 9:30 PM 33 Hours, 41 Minutes American Electric Power RFC Kentucky: West Virginia: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 98575
2017 3 03/02/2017 12:20 PM 03/02/2017 11:45 PM 11 Hours, 25 Minutes ISO New England NPCC Connecticut: Maine: Massachusetts: New Hampshire: Rhode Island: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 54316
2017 3 03/06/2017 8:00 PM 03/07/2017 1:00 AM 5 Hours, 0 Minutes Kansas City Power & Light Co SERC Missouri: Jackson County, Platte County, Cass County, Lafayette County, Chariton County, Carroll County, Clay County, Johnson County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 97734
2017 3 03/08/2017 9:30 AM 03/11/2017 5:00 AM 67 Hours, 30 Minutes Consumers Energy Co RFC Michigan: Jackson County, Calhoun County, Ingham County, Hillsdale County, Washtenaw County, Kent County, Ottawa County, Midland County, Saginaw County; Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 343000
2017 3 03/08/2017 11:30 AM 03/08/2017 7:52 PM 8 Hours, 22 Minutes Cleveland Electric Illum Co RFC Ohio Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 71012
2017 3 03/08/2017 12:00 PM 03/11/2017 11:31 AM 71 Hours, 31 Minutes Detroit Edison Co RFC Michigan Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 800000
2017 3 03/08/2017 1:30 PM 03/08/2017 4:30 PM 3 Hours, 0 Minutes Niagara Mohawk Power Corporation (dba National Grid) NPCC New York Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather/Transmission Interruption Unknown 106869
2017 3 03/08/2017 3:33 PM ongoing ongoing Rochester Gas & Electric Corp NPCC New York Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 50000
2017 3 03/14/2017 12:32 PM ongoing ongoing ISO New England NPCC Connecticut: Massachusetts: Rhode Island: New Hampshire: Maine: Vermont: Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 69647
2017 3 03/21/2017 8:00 PM 03/22/2017 9:15 AM 13 Hours, 15 Minutes Southern Company SERC Georgia Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 857 257000
2017 3 03/29/2017 3:30 AM 03/31/2017 6:00 AM 50 Hours, 30 Minutes Oncor Electric Delivery Company LLC TRE Texas Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 175000
2017 4 04/03/2017 11:00 AM 04/03/2017 8:00 PM 9 Hours, 0 Minutes Southern Company SERC Alabama, Georgia Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 290 86330
2017 4 04/06/2017 7:00 PM ongoing ongoing Pacific Gas & Electric Co WECC California Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 100000
2017 4 04/07/2017 4:33 AM 04/07/2017 8:20 AM 3 Hours, 47 Minutes Pacificorp WECC Oregon Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 100 64852
2017 4 04/07/2017 8:15 AM 04/08/2017 12:14 AM 15 Hours, 59 Minutes Portland General Electric Co WECC Oregon: Multnomah County, Washington County, Marion County, Clackamas County Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 153867
2017 4 04/24/2017 5:32 AM 04/24/2017 6:33 AM 1 Hours, 1 Minutes Duke Energy Carolinas SERC North Carolina: Mecklenburg County Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 240 74698
2017 4 04/30/2017 1:00 AM 04/30/2017 5:45 PM 16 Hours, 45 Minutes Entergy Corp SERC Arkansas, Louisiana, Mississippi Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 145174
2017 5 05/01/2017 11:14 PM 05/01/2017 11:34 PM 0 Hours, 20 Minutes Pennsylvania Electric Co RFC Ohio Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 92390
2017 5 05/03/2017 6:58 PM 05/03/2017 9:15 PM 2 Hours, 17 Minutes Southern California Edison Co WECC California Load shedding of 100 Megawatts or more implemented under emergency operational policy-Generation Inadequacy 572 0
2017 5 05/03/2017 7:05 PM 05/03/2017 9:00 PM 1 Hours, 55 Minutes California ISO WECC California Load shedding of 100 Megawatts or more implemented under emergency operational policy-Generation Inadequacy 878 Unknown
2017 5 05/04/2017 5:00 AM 05/04/2017 10:00 PM 17 Hours, 0 Minutes Southern Company SERC Alabama: Georgia Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 200 60377
2017 5 05/07/2017 5:15 AM ongoing ongoing California Department of Water Resources WECC California: Fresno County Fuel supply emergencies that could impact electric power system adequacy or reliability-Fuel Supply Deficiency 0 0
2017 5 05/07/2017 11:30 PM 05/08/2017 5:00 AM 5 Hours, 30 Minutes Owensboro Municipal Utilities SERC Kentucky: Daviess County Public appeal to reduce the use of electricity for purposes of maintaining the continuity of the electric power system-Generation Inadequacy 80 0
2017 5 05/19/2017 5:30 AM ongoing ongoing Ameren Missouri SERC Missouri: St. Louis County Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 70696
2017 5 05/27/2017 11:00 PM ongoing ongoing Tennessee Valley Authority SERC Tennessee: Shelby County, Putnam County, Knox County, Davidson County, Hamilton County; Alabama: Madison County Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 116000
2017 5 05/27/2017 11:10 PM ongoing ongoing Memphis Light Gas and Water Division SERC Tennessee: Shelby County Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather 391 188000
2017 5 05/28/2017 7:30 PM 05/29/2017 10:00 PM 26 Hours, 30 Minutes American Electric Power - (SPP Reliability Region) TRE Texas: Louisiana Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 103000
2017 5 05/28/2017 7:30 PM 05/29/2017 10:00 PM 26 Hours, 30 Minutes Southwest Power Pool, Inc. SERC Louisiana: Texas Loss of electric service to more than 50,000 customers for 1 hour or more-Severe Weather Unknown 103000
2017 6 06/11/2017 2:39 PM 06/11/2017 5:55 PM 3 Hours, 16 Minutes MISO RFC Michigan Electrical System Separation (Islanding) where part or parts of a power grid remain(s) operational in an otherwise blacked out area or within the partial failure of an integrated electrical system-Transmission Interruption 63 Unknown

Note: Customers affected are estimates and are preliminary.
Source: Form OE-417, 'Electric Emergency Incident and Disturbance Report.'