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- Buckeye Power, Inc.
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- Central Iowa Power Cooperative
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- East Texas Electric Cooperative
- Golden Spread Electric Cooperative
- Great River Energy
- Hoosier Energy Rural Electric Cooperative
- Minnkota Power Cooperative
- North Carolina Electric Membership Corporation
- Oglethorpe Power Corporation
- Old Dominion Electric Cooperative
- Prairie Power, Inc.
- Rayburn Country Electric Cooperative, Inc.
- Southern Illinois Power Cooperative
- Southern Maryland Electric Cooperative
- Sunflower Electric Power Corporation
- Wabash Valley Power Association
- Western Farmers Electric Cooperative
- Wolverine Power Cooperative
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