GridPlants

Balancing areas

A balancing authority keeps supply and demand matched minute by minute inside its area, and every plant in the EIA-860 data names the one it belongs to. These are the 40 areas with at least 20 plants; smaller areas appear on the plant pages.

AreaPlantsCapacityLargest fuel
PJM Interconnection2,049226.9 GWNatural gas
MISO (Midcontinent)2,383212.6 GWNatural gas
ERCOT (Texas)935173.6 GWNatural gas
Southwest Power Pool713103.2 GWNatural gas
California ISO1,63794.4 GWNatural gas
Southern Company33570.6 GWNatural gas
New York ISO1,09345.6 GWNatural gas
Tennessee Valley Authority15244.0 GWNatural gas
Florida Power & Light15342.0 GWNatural gas
ISO New England1,47538.2 GWNatural gas
Duke Energy Carolinas44131.0 GWNatural gas
Bonneville Power Administration12930.5 GWHydroelectric
PacifiCorp East17218.7 GWCoal
Salt River Project4418.4 GWNatural gas
Duke Energy Progress East46217.7 GWNatural gas
Duke Energy Florida7416.5 GWNatural gas
Public Service Company of Colorado19216.4 GWNatural gas
Nevada Power10615.7 GWNatural gas
WAPA Rocky Mountain16611.3 GWCoal
LA Department of Water and Power9510.2 GWNatural gas
Arizona Public Service689,867 MWNatural gas
Tampa Electric458,684 MWNatural gas
Dominion Energy South Carolina618,135 MWNatural gas
PNM (New Mexico)1027,538 MWWind
WAPA Desert Southwest247,136 MWHydroelectric
Associated Electric Cooperative346,706 MWNatural gas
Santee Cooper285,978 MWCoal
Balancing Authority of Northern California845,719 MWNatural gas
Idaho Power1344,872 MWHydroelectric
Tucson Electric Power484,499 MWCoal
NorthWestern Energy524,265 MWCoal
Portland General Electric1024,224 MWNatural gas
Puget Sound Energy343,339 MWNatural gas
El Paso Electric272,856 MWNatural gas
PacifiCorp West1172,741 MWHydroelectric
Southwestern Power Administration292,601 MWHydroelectric
Imperial Irrigation District582,324 MWGeothermal
Avista302,309 MWHydroelectric
WAPA Upper Great Plains West221,128 MWHydroelectric
Hawaiian Electric23894 MWSolar