| Agralite Electric Cooperative | 
C | 
Benson | 
MN | 
| Big Flat Electric Cooperative | 
C | 
Malta | 
MT | 
| Big Horn Rural Electric Company | 
C | 
Basin | 
WY | 
| Black Hills Electric Cooperative | 
C | 
Custer | 
SD | 
| Bon Homme Yankton Electric Association | 
C | 
Tabor | 
SD | 
| Boone Valley Electric Cooperative | 
C | 
Renwick | 
IA | 
| Burke-Divide Electric Cooperative | 
C | 
Columbus | 
ND | 
| Butler County REC | 
C | 
Allison | 
IA | 
| Butte Electric Cooperative | 
C | 
Newell | 
SD | 
| Calhoun County REC | 
C | 
Rockwell City | 
IA | 
| Cam Wal Electric Cooperative | 
C | 
Selby | 
SD | 
| Capital Electric Cooperative | 
C | 
Bismarck | 
ND | 
| Carbon Power & Light | 
C | 
Saratoga | 
WY | 
| Central Electric Cooperative | 
C | 
Mitchell | 
SD | 
| Central Montana Electric Power Cooperative | 
A | 
Great Falls | 
MT | 
| Central New Mexico Electric Cooperative | 
C | 
Mountainair | 
NM | 
| Central Power Electric Cooperative | 
A | 
Minot | 
ND | 
| Charles Mix Electric Association | 
C | 
Lake Andes | 
SD | 
| Cherry-Todd Electric Cooperative | 
C | 
Mission | 
SD | 
| Chimney Rock Public Power District | 
C | 
Bayard | 
NE | 
| City of Elk Point | 
B | 
Elk Point | 
SD | 
| Clay-Union Electric Corporation | 
C | 
Vermillion | 
SD | 
| Codington-Clark Electric Cooperative | 
C | 
Watertown | 
SD | 
| Columbus Electric Cooperative | 
C | 
Deming | 
NM | 
| Continental Divide Electric Cooperative, Inc. | 
C | 
Grants & Gallup | 
NM | 
| Corn Belt Power Cooperative | 
A | 
Humboldt | 
IA | 
| Crow Wing Power | 
A | 
Brainerd | 
MN | 
| Dakota Energy Cooperative | 
C | 
Huron | 
SD | 
| Dakota Valley Electric Cooperative | 
C | 
Milnor | 
ND | 
| Douglas Electric Cooperative | 
C | 
Armour | 
SD | 
| East River Electric Power Cooperative | 
A | 
Madison | 
SD | 
| Empire Electric Association | 
C | 
Cortez | 
CO | 
| Federated Rural Electric Association | 
C | 
Jackson | 
MN | 
| FEM Electric Association | 
C | 
Ipswich | 
SD | 
| Fergus Electric Cooperative | 
C | 
Lewistown | 
MT | 
| Flathead Electric Cooperative | 
D | 
Kalispell & Libby | 
MT | 
| Franklin REC | 
C | 
Hampton | 
IA | 
| Garland Light & Power Company | 
C | 
Powell | 
WY | 
| Goldenwest Electric Cooperative | 
C | 
Wibaux | 
MT | 
| Grand Electric Cooperative | 
A | 
Bison | 
SD | 
| Grundy County REC | 
C | 
Grundy County | 
IA | 
| Gunnison County Electric Cooperative Association | 
C | 
Gunnison | 
CO | 
| H-D Electric Cooperative | 
C | 
Clear Lake | 
SD | 
| Harrison County Rural Electric Cooperative | 
C | 
Woodbine | 
IA | 
| High Plains Power Inc. | 
C | 
Thermopolis and Riverton | 
WY | 
| High West Energy | 
C | 
Pine Bluffs | 
WY | 
| Highline Electric Association | 
C | 
Holyoke | 
CO | 
| Hill County Electric Cooperative | 
C | 
Havre | 
MT | 
| Iowa Lakes Electric Cooperative | 
C | 
Estherville | 
IA | 
| Jemez Mountains Electric Cooperative | 
C | 
Hernandez | 
NM | 
| K. C. Electric Association | 
C | 
Hugo | 
CO | 
| KEM Electric Cooperative | 
A | 
Linton | 
ND | 
| Kingsbury Electric Cooperative | 
C | 
DeSmet | 
SD | 
| L & O Power Cooperative | 
A | 
Rock Rapids | 
IA | 
| La Plata Electric Association | 
C | 
Durango | 
CO | 
| Lacreek Electric Association | 
C | 
Martin | 
SD | 
| Lake Region Electric Association | 
C | 
Webster | 
SD | 
| Lower Yellowstone Rural Electric Cooperative | 
C | 
Sidney | 
MT | 
| Lyon Rural Electric Cooperative | 
C | 
Rock Rapids | 
IA | 
| Lyon-Lincoln Electric Cooperative | 
C | 
Tyler | 
MN | 
| Marias River Electric Cooperative | 
C | 
Shelby | 
MT | 
| McCone Electric Cooperative | 
C | 
Circle | 
MT | 
| McKenzie Electric Cooperative | 
C | 
Watford City | 
ND | 
| McLean Electric Cooperative | 
C | 
Garrison | 
ND | 
| Meeker Energy | 
C | 
Litchfield | 
MN | 
| Members 1st Power Cooperative | 
A | 
Sundance | 
WY | 
| Mid-Yellowstone Electric Cooperative | 
C | 
Hysham | 
MT | 
| Midland Power Cooperative | 
C | 
Jefferson | 
IA | 
| Midwest Electric Cooperative Corporation | 
C | 
Grant | 
NE | 
| Minnesota Valley Cooperative Light & Power Association | 
A | 
Montevideo | 
MN | 
| Minnesota Valley Electric Cooperative | 
A | 
Jordan | 
MN | 
| Mor-Gran-Sou Electric Cooperative | 
A | 
Flasher | 
ND | 
| Mora-San Miguel Electric Cooperative | 
C | 
Mora | 
NM | 
| Moreau-Grand Electric Cooperative | 
C | 
Timber Lake | 
SD | 
| Morgan County Rural Electric Association | 
C | 
Fort Morgan | 
CO | 
| Mountain View Electric Association | 
C | 
Limon | 
CO | 
| Mountrail-Williams Electric Cooperative | 
C | 
Williston | 
ND | 
| Niobrara Electric Association | 
C | 
Lusk | 
WY | 
| Nishnabotna Valley Rural Electric Cooperative | 
C | 
Harlan | 
IA | 
| North Central Electric Cooperative | 
C | 
Bottineau | 
ND | 
| North Iowa Municipal Electric Cooperative Association | 
C | 
Humboldt | 
IA | 
| North West Rural Electric Cooperative | 
C | 
Orange City | 
IA | 
| Northern Electric Cooperative | 
C | 
Bath | 
SD | 
| Northern Plains Electric | 
C | 
Carrington | 
ND | 
| Northern Rio Arriba Electric Cooperative | 
C | 
Chama | 
NM | 
| Northwest Iowa Power Cooperative | 
A | 
LeMars | 
IA | 
| Northwest Rural Public Power District | 
C | 
Hay Springs | 
NE | 
| NorVal Electric Cooperative | 
C | 
Glasgow & Opheim | 
MT | 
| Oahe Electric Cooperative | 
C | 
Blunt | 
SD | 
| Osceola Electric Cooperative | 
C | 
Sibley | 
IA | 
| Otero County Electric Cooperative | 
C | 
Cloudcroft | 
NM | 
| Panhandle Rural Electric Membership Association | 
C | 
Alliance | 
NE | 
| Park Electric Cooperative | 
C | 
Livingston | 
MT | 
| Poudre Valley Rural Electric Association | 
C | 
Fort Collins | 
CO | 
| Powder River Energy Corporation | 
C | 
Sundance | 
WY | 
| Prairie Energy Cooperative | 
C | 
Clarion | 
IA | 
| Raccoon Valley Electric Cooperative | 
C | 
Glidden | 
IA | 
| Redwood Electric Cooperative | 
C | 
Clemens | 
MN | 
| Renville-Sibley Cooperative Power Association | 
C | 
Danube | 
MN | 
| Roosevelt Public Power District | 
C | 
Scottsbluff | 
NE | 
| Rosebud Electric Cooperative | 
A | 
Gregory | 
SD | 
| Roughrider Electric Cooperative | 
C | 
Hazen | 
ND | 
| Rushmore Electric Power Cooperative | 
A | 
Rapid City | 
SD | 
| Sangre de Cristo Electric Association | 
C | 
Buena Vista | 
CO | 
| San Isabel Electric Association | 
C | 
Pueblo | 
CO | 
| San Luis Valley Rural Electric Cooperative | 
C | 
Monte Vista | 
CO | 
| San Miguel Power Association | 
C | 
Nucla | 
CO | 
| Sheridan Electric Cooperative | 
C | 
Medicine Lake | 
MT | 
| Sierra Electric Cooperative | 
C | 
Elephant Butte | 
NM | 
| Sioux Valley Energy | 
C | 
Colman | 
SD | 
| Slope Electric Cooperative | 
C | 
New England | 
ND | 
| Socorro Electric Cooperative | 
C | 
Socorro | 
NM | 
| South Central Electric Association | 
C | 
St. James | 
MN | 
| Southeast Colorado Power Association | 
C | 
La Junta | 
CO | 
| Southeast Electric Cooperative | 
C | 
Ekalaka | 
MT | 
| Southeastern Electric Cooperative | 
C | 
Marion | 
SD | 
| Southwestern Electric Cooperative | 
C | 
Clayton | 
NM | 
| Springer Electric Cooperative | 
C | 
Springer | 
NM | 
| Sun River Electric Cooperative | 
C | 
Fairfield | 
MT | 
| Tongue River Electric Cooperative | 
C | 
Ashland | 
MT | 
| Traverse Electric Cooperative | 
C | 
Wheaton | 
MN | 
| Tri-State Generation and Transmission Association | 
A | 
Denver | 
CO | 
| Union County Electric Cooperative | 
C | 
Elk Point | 
SD | 
| Upper Missouri Power Cooperative | 
A | 
Sidney | 
MT | 
| Verendrye Electric Cooperative | 
C | 
Velva | 
ND | 
| West Central Electric Cooperative | 
C | 
Murdo | 
SD | 
| West River Electric Association | 
C | 
Wall | 
SD | 
| Western Iowa Municipal Electric Association | 
C | 
Manning | 
IA | 
| Western Iowa Power Cooperative | 
C | 
Denison | 
IA | 
| Wheat Belt Public Power District | 
C | 
Sidney | 
NE | 
| Wheatland Rural Electric Association | 
C | 
Wheatland | 
WY | 
| Whetstone Valley Electric Cooperative | 
C | 
Milbank | 
SD | 
| White River Electric Association | 
C | 
Meeker | 
CO | 
| Woodbury County Rural Electric Cooperative | 
C | 
Moville | 
IA | 
| Wright-Hennepin Cooperative Electric Association | 
A | 
Rockford | 
MN | 
| Wyoming Municipal Power Agency | 
A | 
Lusk | 
WY | 
| Wyrulec Company | 
C | 
Torrington | 
WY | 
| Y-W Electric Association | 
C | 
Akron | 
CO | 
| Yellowstone Valley Electric Cooperative | 
C | 
Huntley | 
MT |