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Southwestern Power Administration

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Adapted from the English Wikipedia article Southwestern Power Administration, available under CC BY-SA 4.0Updated 7 August 2025
Southwestern Power Administration
Company typeDivision of the U.S. Department of Energy
IndustryElectric power marketing
Founded1944
FounderUnited States Congress
Headquarters
United States
Area served
Texas, Arkansas, Oklahoma, Missouri, and neighboring states
ProductsHydroelectric power
OwnerUnited States Department of Energy
ParentUnited States Department of Energy

The Southwestern Power Administration (Southwestern) operates as a division within the U.S. Department of Energy. Created under Section 5 of the Flood Control Act of 1944, it functions as a power marketing administration tasked with distributing hydroelectric power produced by 24 multipurpose dams constructed by the United States Army Corps of Engineers. Legally, Southwestern is mandated to sell electricity solely to publicly owned entities, including rural electric cooperatives and municipal utilities. It caters to over 100 preference customers, who collectively provide power to more than 10 million consumers.

Southwestern oversees a network comprising 1,380 miles of high-voltage transmission lines, 24 substations, and 46 communication facilities through its regional offices. The agency’s centralized Operations Center handles continuous power scheduling and dispatching.

The agency’s rate structure is designed to recover all costs fully, encompassing repayment with interest for the construction of dams and transmission infrastructure, major refurbishments, as well as annual operation and maintenance expenses for both the Corps of Engineers and Southwestern itself. On average, yearly revenues amount to around US$100 million, which are returned to the U.S. Treasury, with approximately US$40 million allocated toward interest payments and repayment of federal investments.

History

Efforts led by Texas Speaker Sam Rayburn and Arkansas Representative Clyde T. Ellis focused on maintaining federal ownership of dams built by the U.S. Army Corps of Engineers, while establishing the Southwestern Power Administration (SWPA) to oversee and market their hydroelectric output. In the late 1930s, Rayburn and Ellis secured control over dams at Denison, TX and Norfork, AR within their congressional districts. They championed the creation of a regional system resembling a smaller-scale version of the Tennessee Valley Authority, intended to supply power across Texas, Arkansas, Oklahoma, Missouri, and neighboring states purchasing electricity from these dams. Unlike the TVA, SWPA managed only hydroelectric facilities on federally constructed dams and did not operate any fossil fuel plants.

Central to Rayburn’s vision was expanding affordable electricity access in rural areas, complementing his earlier achievement with the Rural Electrification Act of 1936 that fostered rural electric cooperatives providing low-cost power. The SWPA, along with other Power Marketing Administrations, played a critical role in delivering inexpensive hydroelectric energy that supported REA’s rural electrification objectives. Initially established by a 1943 executive order signed by President Roosevelt—aimed at preventing private utilities from transferring dam control to the Federal Works Agency—the SWPA was formally authorized through the Flood Control Act of 1944, which also created the Southeastern Power Administration. From 1943 until 1984, twenty-four dams were developed under SWPA’s jurisdiction.

List of dams

Name Capacity (MW) Year completed Location
Denison Dam 80 1943 Bryan County, OK / Grayson County, TX
Norfork Dam 80.4 1944 Mountain Home, Arkansas
Fort Gibson Dam 48 1949 Fort Gibson, Oklahoma
Bull Shoals Dam 380 1951 Bull Shoals, Arkansas
Narrows Dam 25.5 1951 Murfreesboro, Arkansas
Whitney Dam 43 1951 Whitney, Texas
Tenkiller Ferry Dam 34 1952 Gore, Oklahoma
Blakely Mountain Dam 75 1953 Hot Springs, Arkansas
Town Bluff Dam 8 1953 Jasper, Texas
Table Rock Dam 200 1958 Branson, Missouri
Greers Ferry Dam 96 1962 Heber Springs, Arkansas
Eufaula Dam 90 1964 Eufaula, Oklahoma
Sam Rayburn Dam 52 1965 Jasper, Texas
Beaver Dam 112 1966 Eureka Springs, Arkansas
Broken Bow Dam 100 1968 Broken Bow, Oklahoma
Keystone Dam 70 1968 Tulsa, Oklahoma
Stockton Dam 52 1969 Stockton, Missouri
Robert S. Kerr Dam 110 1970 Sallisaw, Oklahoma
Webbers Falls Dam 60 1970 Webbers Falls, Oklahoma
Dardanelle Dam 160.8 1971 Russellville, Arkansas
DeGray Dam 68 1972 Arkadelphia, Arkansas
Ozark-Jeta Taylor Lock and Dam 100 1974 Ozark, Arkansas
Harry S. Truman Dam 160 1979 Tom Township, Missouri
Clarence Cannon Dam 58 1984 Monroe City, Missouri


Visual Representations of Southwestern Power Administration

Denison Dam located in North Texas
Denison Dam, finalized in 1943, stands as the earliest project within the SWPA's assets.
Ozark-Jeta Taylor Dam structure
The Ozark-Jeta Taylor Lock and Dam situated in Ozark, Arkansas is distinguished as SWPA’s sole hydroelectric installation without an associated reservoir.
Bull Shoals Dam on Arkansas-Missouri border
Bull Shoals Dam, a key infrastructure asset straddling the Arkansas-Missouri boundary.
Southwestern Power Administration substation in eastern Arkansas
Electrical substation operated by SWPA located in Clarksville, Arkansas.
Southwestern Power Administration electrical distribution facility in Oklahoma
SWPA-managed switchyard facility based in Oklahoma.


Bibliography

  • Executive Order No. 7037 ~ Creation of the Rural Electrification Administration, Franklin D. Roosevelt, May 11, 1935, National Archives and Records Service, pp. 172-175
  • Franklin D. Roosevelt: "Executive Order 9366 - Concerning the Management and Allocation of Electric Power at Denison Dam, Grand River Dam, and Norfork Dam," July 30, 1943, The American Presidency Project, University of California - Santa Barbara
  • Southwestern Federal Power Program—Financial Status and Challenges, U.S. General Accounting Office, November 22, 1972, Congressional Report, U.S. Government Printing Office
  • Electricity for a Region: The Southwest Power Administration, Jeanette W. Ford, 1982, The Chronicles of Oklahoma, vol. 60, no. 4 (Winter 1982-83), Oklahoma Historical Society, pp. 448-459

External links