Electricity
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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 4.3.A. Summer Net Internal Demand, Capacity Resources, and Capacity Margins by North American Electric Reliability Assessment Area, 1999-2010 Actual
(Megawatts and Percent) |
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| Interconnection | NERC Regional Assesment Area | Net Internal Demand (MW)[1] -- Summer | |||||||||||
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Eastern Interconnection |
FRCC | 34,832 | 35,666 | 38,932 | 37,951 | 40,387 | 42,243 | 45,950 | 45,345 | 46,434 | 44,660 | 46,263 | 45,522 |
| NPCC | 53,450 | 54,270 | 55,888 | 55,164 | 53,936 | 51,580 | 57,402 | 60,879 | 58,221 | 59,896 | 55,730 | 56,232 | |
| Balance of Eastern Region |
401,701 | 420,443 | 417,613 | 430,396 | 422,253 | 419,349 | 455,594 | 469,639 | 465,229 | 447,629 | 424,714 | 454,759 | |
| ECAR | 94,072 | 98,651 | 100,235 | 101,251 | 98,487 | 95,300 | NA | NA | NA | NA | NA | NA | |
| MAAC | 49,325 | 51,358 | 54,015 | 54,296 | 53,566 | 52,049 | NA | NA | NA | NA | NA | NA | |
| MAIN | 47,165 | 51,845 | 53,032 | 53,267 | 53,617 | 50,499 | NA | NA | NA | NA | NA | NA | |
| MAPP | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 4,493 | |
| MISO | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 100,963 | |
| MRO | 30,606 | 28,006 | 27,125 | 28,825 | 28,775 | 29,094 | 38,266 | 40,661 | 40,249 | 38,857 | 35,849 | NA | |
| PJM | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 136,465 | |
| RFC | NA | NA | NA | NA | NA | NA | 190,200 | 190,800 | 177,200 | 169,155 | 161,241 | NA | |
| SERC | 142,726 | 151,527 | 144,399 | 154,459 | 148,380 | 153,024 | 186,049 | 196,196 | 205,321 | 196,711 | 186,507 | 160,896 | |
| SPP | 37,807 | 39,056 | 38,807 | 38,298 | 39,428 | 39,383 | 41,079 | 41,982 | 42,459 | 42,906 | 41,117 | 51,942 | |
| ERCOT | TRE | 51,697 | 53,649 | 55,106 | 55,833 | 59,282 | 58,531 | 59,060 | 61,214 | 61,063 | 61,049 | 63,518 | 64,378 |
| Western Interconnection |
WECC | 112,177 | 116,913 | 107,294 | 117,032 | 120,894 | 121,205 | 128,464 | 139,402 | 135,839 | 130,916 | 122,881 | 126,944 |
| All Interconnections |
Contiguous U.S. |
653,857 | 680,941 | 674,833 | 696,376 | 696,752 | 692,908 | 746,470 | 776,479 | 766,786 | 744,151 | 713,106 | 747,836 |
| Interconnection | NERC Regional Assesment Area |
Capacity Resources (MW)[2] -- Summer | |||||||||||
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | ||
| Eastern Interconnection |
FRCC | 40,645 | 43,083 | 42,290 | 43,342 | 46,806 | 48,579 | 50,200 | 50,909 | 53,027 | 51,541 | 49,239 | 53,370 |
| NPCC | 63,077 | 63,376 | 63,760 | 66,208 | 70,902 | 71,532 | 72,258 | 73,095 | 73,771 | 75,894 | 78,639 | 67,569 | |
| Balance of Eastern Region |
460,325 | 490,333 | 487,950 | 504,357 | 513,382 | 526,454 | 532,917 | 534,270 | 543,608 | 539,936 | 559,823 | 571,719 | |
| ECAR | 107,451 | 115,379 | 113,136 | 119,736 | 123,755 | 127,919 | NA | NA | NA | NA | NA | NA | |
| MAAC | 57,831 | 60,679 | 59,533 | 63,619 | 65,897 | 66,167 | NA | NA | NA | NA | NA | NA | |
| MAIN | 55,984 | 64,170 | 65,950 | 67,025 | 67,410 | 65,677 | NA | NA | NA | NA | NA | NA | |
| MAPP | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 7,210 | |
| MISO | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 131,691 | |
| MRO | 35,373 | 34,236 | 32,271 | 34,259 | 33,287 | 35,830 | 46,792 | 50,116 | 47,259 | 48,180 | 47,529 | NA | |
| PJM | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 168,970 | |
| RFC | NA | NA | NA | NA | NA | NA | 220,000 | 214,693 | 213,544 | 215,477 | 215,700 | NA | |
| SERC | 160,575 | 169,760 | 171,530 | 172,485 | 177,231 | 182,861 | 219,749 | 223,630 | 234,232 | 228,169 | 247,400 | 200,511 | |
| SPP | 43,111 | 46,109 | 45,530 | 47,233 | 45,802 | 48,000 | 46,376 | 45,831 | 48,573 | 48,110 | 49,194 | 63,337 | |
| ERCOT | TRE | 65,423 | 69,622 | 70,797 | 76,849 | 74,764 | 73,850 | 66,724 | 70,664 | 75,912 | 74,274 | 76,280 | 73,857 |
| Western Interconnection |
WECC | 136,274 | 141,640 | 124,193 | 142,624 | 150,277 | 155,455 | 160,026 | 162,288 | 168,080 | 167,860 | 152,467 | 158,407 |
| All Interconnections |
Contiguous U.S. | 765,744 | 808,054 | 788,990 | 833,380 | 856,131 | 875,870 | 882,125 | 891,226 | 914,397 | 909,504 | 916,449 | 924,922 |
| Interconnection | NERC Regional Assesment Area |
Capacity Margin (percent)[3] -- Summer | |||||||||||
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | ||
| Eastern Interconnection |
FRCC | 14.3 | 17.2 | 7.9 | 12.4 | 13.7 | 13.0 | 8.5 | 10.9 | 12.4 | 13.4 | 6.0 | 14.7 |
| NPCC | 15.3 | 14.4 | 12.3 | 16.7 | 23.9 | 27.9 | 20.6 | 16.7 | 21.1 | 21.1 | 29.1 | 16.8 | |
| Balance of Eastern Region |
12.7 | 14.3 | 14.4 | 14.7 | 17.8 | 20.3 | 14.5 | 12.1 | 14.4 | 17.1 | 24.1 | 20.5 | |
| ECAR | 12.5 | 14.5 | 11.4 | 15.4 | 20.4 | 25.5 | NA | NA | NA | NA | NA | NA | |
| MAAC | 14.7 | 15.4 | 9.3 | 14.7 | 18.7 | 21.3 | NA | NA | NA | NA | NA | NA | |
| MAIN | 15.8 | 19.2 | 19.6 | 20.5 | 20.5 | 23.1 | NA | NA | NA | NA | NA | NA | |
| MAPP | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 37.7 | |
| MISO | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 23.3 | |
| MRO | 13.5 | 18.2 | 15.9 | 15.9 | 13.6 | 18.8 | 18.2 | 18.9 | 14.8 | 19.3 | 24.6 | NA | |
| PJM | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | 19.2 | |
| RFC | NA | NA | NA | NA | NA | NA | 13.5 | 11.1 | 17.0 | 21.5 | 25.2 | NA | |
| SERC | 11.1 | 10.7 | 15.8 | 10.5 | 16.3 | 16.3 | 15.3 | 12.3 | 12.3 | 13.8 | 24.6 | 19.8 | |
| SPP | 12.3 | 15.3 | 14.8 | 18.9 | 13.9 | 18.0 | 11.4 | 8.4 | 12.6 | 10.8 | 16.4 | 18.0 | |
| ERCOT | TRE | 21.0 | 22.9 | 22.2 | 27.3 | 20.7 | 20.7 | 11.5 | 13.4 | 19.6 | 17.8 | 16.7 | 12.8 |
| Western Interconnection |
WECC | 17.7 | 17.5 | 13.6 | 17.9 | 19.6 | 22.0 | 19.7 | 14.1 | 19.2 | 22.0 | 19.4 | 19.9 |
| All Interconnections |
Contiguous U.S. |
14.6 | 15.7 | 14.5 | 16.4 | 18.6 | 20.9 | 15.4 | 12.9 | 16.1 | 18.2 | 22.2 | 19.1 |
| [1] Net Internal Demand represent the system demand that is planned for by the electric power industry`s reliability authority and is equal to Internal 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 Summer peak period begins on June1 and extends through September 30. • 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 consistent trend 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." |
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