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Acquisitions and Dispositions
 6 Months Ended
Jun. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]  
Acquisitions and Dispositions ACQUISITIONS AND DISPOSITIONS
See Note 15 to the financial statements in Item 8 of the Form 10-K for additional information.
Southern Power
Construction Projects
During the six months ended June 30, 2024, Southern Power completed construction of and placed in service the 150-MW South Cheyenne solar facility. In addition, Southern Power continued construction of the 200-MW first phase and the 180-MW second phase of the Millers Branch solar facility. Southern Power also committed to expand construction by an additional 90 MWs through a third phase of the Millers Branch solar project. At June 30, 2024, the total cost of construction incurred for the Millers Branch project was $117 million, which is primarily included in CWIP.
Project FacilityResource
Approximate Nameplate Capacity (MW)
LocationProjected/
Actual COD		PPA Contract Period
Projects Completed During the Six Months Ended June 30, 2024
South CheyenneSolar150Laramie County, WY
Second quarter 2024
20 years
Projects Under Construction at June 30, 2024
Millers Branch(*)
Phase I
Solar200Haskell County, TXFourth quarter 202520 years
Phase II
Solar180Haskell County, TXSecond quarter 202615 years
Phase III
Solar
90
Haskell County, TX
Fourth quarter 2026
15 years
(*)The Millers Branch project includes an option to expand capacity up to a total of approximately 500 MWs.