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Electric Power Annual 2010 Data Tables

With Data for 2010   |  Release Date:  November 09, 2011   |  Next Release Date: November 2012

Table 4.4.A. Winter Net Internal Demand, Capacity Resources, and Capacity Margins by North American Electric Reliability Assessment Areas, 2001-2010 Actual
(Megawatts and Percent)
Interconnection NERC Regional
Assesment Area		 Net Internal Demand (MW)[1] -- Winter
    2001/
2002		 2002/
2003		 2003/
2004		 2004/
2005		 2005/
2006		 2006/
2007		 2007/
2008		 2008/
2009		 2009/
2010		 2010/ 2011
Eastern
Interconnection		 FRCC 39,699 42,001 36,229 41,449 42,493 45,993 46,093 45,042 51,703 45,954
NPCC 42,551 45,980 47,850 47,859 46,328 48,394 46,185 47,151 44,864 44,172
Balance of Eastern Region 341,158 360,748 357,026 371,011 375,365 385,887 383,779 384,495 399,204 389,351
ECAR 82,831 84,844 86,332 91,800 NA NA NA NA NA NA
MAAC 39,458 46,159 45,625 45,565 NA NA NA NA NA NA
MAIN 38,412 39,974 39,955 40,618 NA NA NA NA NA NA
MAPP MRO MRO MRO NA NA NA NA NA NA 4,877
MISO NA NA NA NA NA NA NA NA NA 80,311
MRO 21,575 23,090 24,042 24,446 32,854 34,582 34,358 34,539 33,983 NA
PJM NA NA NA NA NA NA NA NA NA 115,535
RFC NA NA NA NA 151,600 147,800 141,200 142,395 143,827 NA
SERC 130,311 137,541 133,244 139,486 160,054 173,036 176,766 175,199 188,653 148,062
SPP 28,571 29,140 27,828 29,096 30,857 30,469 31,455 32,362 32,741 40,566
ERCOT TRE 43,908 44,719 41,988 44,010 46,991 46,038 46,068 46,747 56,191 55,917
Western
Interconnection		 WECC 95,395 94,554 100,337 101,002 105,670 107,586 113,504 110,977 106,256 99,515
All
Interconnections		 Contiguous
U.S.		 562,711 588,002 583,430 605,331 616,847 633,898 635,629 634,412 658,219 634,909
Interconnection NERC Regional
Assesment Area		 Capacity Resources[2] -- Winter
    2001/
2002		 2002/
2003		 2003/
2004		 2004/
2005		 2005/
2006		 2006/
2007		 2007/
2008		 2008/
2009		 2009/
2010		 2010/ 2011
Eastern
Interconnection		 FRCC 44,336 46,219 50,010 51,196 49,066 56,896 57,510 53,278 52,751 57,358
NPCC 66,314 68,884 73,123 74,277 76,076 76,110 75,772 79,394 78,992 70,557
Balance of
Eastern Region		 488,418 511,642 524,995 538,041 545,850 547,005 537,094 545,843 567,746 595,627
ECAR 115,926 123,823 129,351 131,187 NA NA NA NA NA NA
MAAC 63,604 66,143 68,134 69,604 NA NA NA NA NA NA
MAIN 63,209 66,694 68,942 66,414 NA NA NA NA NA NA
MAPP NA NA NA NA NA NA NA NA NA 6,941
MISO NA NA NA NA NA NA NA NA NA 129,241
MRO 30,809 33,224 32,769 34,371 44,620 46,959 44,987 47,343 46,422 NA
PJM NA NA NA NA NA NA NA NA NA 190,000
RFC NA NA NA NA 229,000 220,930 212,257 215,477 215,700 NA
SERC 169,580 174,925 179,810 186,784 224,652 231,917 229,627 234,797 255,527 207,558
SPP 45,290 46,833 45,989 49,681 47,578 47,199 50,223 48,226 50,097 61,888
ERCOT TRE 72,644 73,335 77,111 71,902 61,003 71,451 75,504 73,910 69,490 77,660
Western
Interconnection		 WECC 119,254 132,278 152,158 149,360 152,211 166,362 167,770 167,312 151,022 156,413
All
Interconnections		 Contiguous
U.S.		 790,966 832,358 877,397 884,776 884,206 917,824 913,650 919,736 920,002 957,615
Interconnection NERC Regional
Assesment Area		 Capacity Margin (percent)[3] -- Winter
    2001/
2002		 2002/
2003		 2003/
2004		 2004/
2005		 2005/
2006		 2006/
2007		 2007/
2008		 2008/
2009		 2009/
2010		 2010/
2011
Eastern
Interconnection		 FRCC 10.5 9.1 27.6 19.0 13.4 19.2 19.9 15.5 2.0 19.9
NPCC 35.8 33.3 34.6 35.6 39.1 36.4 39.0 40.6 43.2 37.4
Balance of
Eastern Region		 30.2 29.5 32.0 31.0 31.2 29.5 28.5 29.6 29.7 4.6
ECAR 28.5 31.5 33.3 30.0 NA NA NA NA NA NA
MAAC 38.0 30.2 33.0 34.5 NA NA NA NA NA NA
MAIN 39.2 40.1 42.0 38.8 NA NA NA NA NA NA
MAPP NA NA NA NA NA NA NA NA NA 29.7
MISO NA NA NA NA NA NA NA NA NA 37.9
MRO 30.0 30.5 26.6 28.9 26.4 26.4 23.6 27.0 26.8 NA
PJM NA NA NA NA NA NA NA NA NA 39.2
RFC NA NA NA NA 33.8 33.1 33.5 33.9 33.3 NA
SERC 23.2 21.4 25.9 25.3 28.8 25.4 23.0 25.4 26.2 28.7
SPP 36.9 37.8 39.5 41.4 35.1 35.4 37.4 32.9 34.6 34.5
ERCOT TRE 39.6 39.0 45.5 38.8 23.0 35.6 39.0 36.8 19.1 28.0
Western
Interconnection		 WECC 20.0 28.5 34.1 32.4 30.6 35.3 32.3 33.7 29.6 36.4
All
Interconnections		 Contiguous
U.S.		 28.9 29.4 33.5 31.6 30.2 30.9 30.4 31.0 28.5 33.7
[1] Net Internal Demand represent the system demand that is planned for by the electric power industry`s reliability authority and is equal toInternal Demand less Direct Control Load Management and Interruptible Demand.
[2] Capacity Resources: Utility and nonutility-owned generating capacity that is existing or in various stages of planning or construction,less inoperable capacity, plus planned capacity purchases from other resources, less planned capacity sales.
[3] Capacity Margin is the amount of unused available capability of an electric power system at peak load as a percentage of capacity resources.
Notes:
• NERC region and reliability assessment area maps are provided on EIA's Electricity Reliability web page: http://www.eia.gov/cneaf/electricity/page/eia411/eia411.html
•Peak load represents an hour of a day during the associated peak period.
•The Winter peak period begins October 1 and extends through May 31.
•Historically the MRO, RFC, SERC, and SPP regional boundaries were altered as utilities changed reliability organizations. The historical dataseries for these regions have not been adjusted. Instead, the Balance of Eastern Region category was introduced to to provide a consistenttrend of the Eastern interconnection.
•ECAR, MAAC, and MAIN dissolved at the end-of-2005. Many of the former utility members joined RFC. Reliability First Corporation (RFC) came into existence on January 1, 2006. RFC submitted a consolidated filing covering the historical NERC regions of ECAR, MAAC, and MAIN.
•NA - Not Available
Source: U.S. Energy Information Administration, Form EIA-411, "Coordinated Bulk Power Supply and Demand Program Report."