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Acquisitions and Dispositions (Tables)
3 Months Ended
Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract]  
Schedule of Asset Acquisitions
Project FacilityResource
Approximate Nameplate Capacity (MW)
LocationProjected/
Actual COD
PPA Contract Period
Projects Under Construction at March 31, 2024
Millers Branch(a)
Phase I
Solar200Haskell County, TXFourth quarter 202520 years
Phase II
Solar180Haskell County, TXSecond quarter 202615 years
South CheyenneSolar150Laramie County, WY
Second quarter 2024(b)
20 years
(a)The Millers Branch project includes an option to expand capacity up to a total of approximately 500 MWs.
(b)Subsequent to March 31, 2024, Southern Power completed construction of and placed in service the 150-MW South Cheyenne solar facility.