Table 8.6.A. Noncoincident Peak Load by North American Electric Reliability Corporation Assessment Area,
2002 - 2012, Actual
 

Summer Peak Load (Megawatts)
  Eastern Interconnection ERCOT Western Interconnection All Interconnections
Period FRCC NPCC Balance of Eastern Region ECAR MAAC MAIN MAPP MISO MRO PJM RFC SERC SPP TRE WECC Contiguous U.S.
2002 40,696 56,012 442,535 102,996 55,569 56,396 -- -- 29,119 -- -- 158,767 39,688 56,248 119,074 714,565
2003 40,475 55,018 431,349 98,487 53,566 56,988 -- -- 28,831 -- -- 153,110 40,367 59,996 122,537 709,375
2004 42,383 52,549 427,860 95,300 52,049 53,439 -- -- 29,351 -- -- 157,615 40,106 58,531 123,136 704,459
2005 46,396 58,960 462,550 -- -- -- -- -- 39,918 -- 190,200 190,705 41,727 60,210 130,760 758,876
2006 45,751 63,241 476,048 -- -- -- -- -- 42,194 -- 191,920 199,052 42,882 62,339 142,096 789,475
2007 46,676 58,314 475,660 -- -- -- -- -- 41,684 -- 181,700 209,109 43,167 62,188 139,389 782,227
2008 44,836 58,543 452,087 -- -- -- -- -- 39,677 -- 169,155 199,779 43,476 62,174 134,829 752,470
2009 46,550 55,944 431,701 -- -- -- -- -- 37,963 -- 161,241 191,032 41,465 63,518 128,245 725,958
2010 45,722 60,554 466,543 -- -- -- 4,598 108,346 -- 136,465 -- 164,058 53,077 65,776 129,352 767,948
2011 44,968 63,390 486,131 -- -- -- 4,726 102,819 -- 158,043 -- 164,726 55,817 68,416 119,565 782,469
2012 44,338 58,319 468,092 -- -- -- 5,051 96,769 -- 154,339 -- 161,687 50,246 66,548 130,465 767,762

 

Winter Peak Load (Megawatts)
  Eastern Interconnection ERCOT Western Interconnection All Interconnections
Period FRCC NPCC Balance of Eastern Region ECAR MAAC MAIN MAPP MISO MRO PJM RFC SERC SPP TRE WECC Contiguous U.S.
2002 / 2003 45,635 46,009 371,977 87,300 46,551 42,412 -- -- 23,645 -- -- 141,882 30,187 45,414 95,951 604,986
2003 / 2004 36,841 48,079 364,232 86,332 45,625 41,719 -- -- 24,134 -- -- 137,972 28,450 42,702 102,020 593,874
2004 / 2005 44,839 48,176 378,987 91,800 45,905 42,929 -- -- 24,526 -- -- 144,337 29,490 44,010 102,689 618,701
2005 / 2006 42,657 46,828 381,246 -- -- -- -- -- 33,748 -- 151,600 164,638 31,260 48,141 107,493 626,365
2006 / 2007 42,526 46,697 390,263 -- -- -- -- -- 34,677 -- 149,631 175,163 30,792 50,402 111,093 640,981
2007 / 2008 41,701 46,795 386,301 -- -- -- -- -- 33,191 -- 141,900 179,888 31,322 50,408 112,700 637,905
2008 / 2009 45,275 46,043 390,829 -- -- -- -- -- 36,029 -- 142,395 179,596 32,809 47,806 113,605 643,557
2009 / 2010 53,022 44,864 405,176 -- -- -- -- -- 35,351 -- 143,827 193,135 32,863 56,191 109,565 668,818
2010 / 2011 46,135 45,712 400,589 -- -- -- 5,069 86,728 -- 115,535 -- 152,030 41,226 57,315 101,668 651,418
2011 / 2012 40,117 45,234 404,280 -- -- -- 4,803 86,844 -- 122,563 -- 150,850 39,220 50,100 108,459 648,190
2012 / 2013 36,409 45,545 390,818 -- -- -- 5,168 74,430 -- 122,566 -- 153,738 34,916 46,909 101,706 621,387

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 June 1 and extends through September 30.
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 data series for these regions have not been adjusted. Instead, the Balance of Eastern Region category was introduced 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.
N/A - Not Available
Source: U.S. Energy Information Administration, Form EIA-411, "Coordinated Bulk Power Supply and Demand Program Report."