Home > Electricity > Electric Power Annual > Net Internal Demand, Actual or Planned Capacity Resources, and Capacity Margins by North American Electric Reliability Council Region

Net Internal Demand, Actual or Planned Capacity Resources, and Capacity Margins by North American Electric Reliability Council Region                      
Table 3.3.    xls     pdf   format     

Table 3.3.  Net Internal Demand, Actual or Planned Capacity Resources, and Capacity Margins by North American Electric Reliability Council Region, Summer, 2007 through 2012
(Megawatts)
North American Electric Reliability Council Region Net Internal Demand[1] Capacity Resources[2] Capacity Margin (percent)[3] Net Internal Demand[1] Capacity Resources[2] Capacity Margin (percent)[3]
  2007 2008
TRE (formerly ERCOT) 63,725 72,503 12.1 65,028 75,749 14.2
FRCC 44,417 53,553 17.1 45,141 55,622 18.8
MRO (U.S.)[4] 41,260 47,875 13.8 42,558 49,182 13.5
NPCC (U.S.) 58,371 72,105 19 59,239 72,897 18.7
ReliabilityFirst[5] 177,200 213,787 17.1 180,300 214,783 16.1
SERC 198,522 235,485 15.7 202,854 237,037 14.4
SPP 43,056 50,109 14.1 44,018 51,901 15.2
WECC (U.S.) 137,925 169,876 18.8 140,940 172,167 18.1
Contiguous U.S. 764,476 915,292 16.5 780,078 929,338 16.1
  2009 2010
TRE (formerly ERCOT) 66,422 77,894 14.7 67,745 77,918 13.1
FRCC 45,980 57,202 19.6 47,085 59,312 20.6
MRO (U.S.)[4] 43,508 49,055 11.3 44,252 49,313 10.3
NPCC (U.S.) 59,532 72,084 17.4 60,306 72,923 17.3
ReliabilityFirst[5] 183,900 217,625 15.5 186,600 219,492 15
SERC 207,110 237,304 12.7 211,114 238,933 11.6
SPP 44,902 53,420 15.9 45,594 53,881 15.4
WECC (U.S.) 143,502 173,494 17.3 146,205 175,269 16.6
Contiguous U.S. 794,856 938,078 15.3 808,902 947,041 14.6
  2011 2012
TRE (formerly ERCOT) 68,833 78,843 12.7 70,235 78,843 10.9
FRCC 48,212 59,979 19.6 49,277 61,693 20.1
MRO (U.S.)[4] 44,993 49,529 9.2 45,732 49,884 8.3
NPCC (U.S.) 61,065 72,923 16.3 61,798 72,800 15.1
ReliabilityFirst[5] 188,900 219,492 13.9 191,600 219,492 12.7
SERC 214,834 240,273 10.6 218,943 240,423 8.9
SPP 46,248 54,328 14.9 46,947 54,630 14.1
WECC (U.S.) 149,137 175,431 15 151,837 176,064 13.8
Contiguous U.S. 822,221 950,799 13.5 836,370 953,830 12.3
  [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 IPP-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.
  [4] Regional name has changed from Mid-Continent Area Power Pool to Midwest Reliability Organization.
  [5] ReliabilityFirst Corporation (RFC) came into existence on January 1, 2006, and submitted a consolidated filing covering the historical NERC regions of ECAR, MAAC, and MAIN.  Many of the former utility members joined RFC.
  Notes: Actual data are final. Projected data are updated annually, so revision superscript is not used. 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 MRO, SERC, and SPP regional boundaries were altered as utilities changed reliability organizations.  The historical data series have not been adjusted. Totals may not equal sum of components because of independent rounding.
  Source: Energy Information Administration, Form EIA-411, "Coordinated Bulk Power Supply Program."
More Tables on Demand, Capacity Resources, and Capacity Margins:
formats
Table 3.2.  Net Internal Demand, Capacity Resources, and Capacity Margins by North American Electric Reliability Council Region, Summer html pdf xls
Table 3.4. Net Internal Demand, Actual or Planned Capacity Resources, and Capacity (Megawatts) html pdf xls

see also:
Electric Power Monthly
Electric Power Annual
annual electricity statistics back to 1949
projected electricity capacity to 2030
international electricity statistics