Denison Dam

Denison Dam. It is a major rolled-earth embankment dam on the Red River of the South, straddling the border between Texas and Oklahoma. Constructed by the United States Army Corps of Engineers between 1939 and 1944, its primary purposes are flood control on the lower Red River and the generation of hydroelectric power. The dam impounds the large reservoir known as Lake Texoma, a premier destination for recreation and a vital regional water supply.

History

The impetus for its construction stemmed from catastrophic flooding along the Red River of the South, particularly the devastating Great Flood of 1935 which inundated vast areas of Louisiana and prompted federal action. The project was authorized under the Flood Control Act of 1938, a key piece of New Deal legislation championed by President Franklin D. Roosevelt. Planning and land acquisition involved complex negotiations with the states of Texas and Oklahoma, as well as with local communities and landowners in areas like the town of Denison, for which the structure is named. The dam's completion in 1944 came during the heightened industrial demands of World War II, providing critical power to support wartime manufacturing in the region.

Construction and design

Built as a rolled-earth fill dam, it stands approximately 165 feet tall and stretches 17,200 feet across the Red River of the South valley. The massive embankment required over 19 million cubic yards of earth and rock, sourced from nearby areas. Integral to the structure is a concrete spillway section equipped with tainter gates to manage reservoir levels, alongside a separate hydroelectric powerhouse. This powerhouse was originally equipped with generators from companies like Westinghouse Electric Corporation and is operated by the Southwestern Power Administration. The design incorporated lessons from earlier Corps projects like Fort Peck Dam and prioritized stability against the region's expansive clay soils.

Operations and purpose

Its operations are managed by the Fort Worth District of the United States Army Corps of Engineers, focusing on three core missions. The primary function is flood control, regulating the flow of the Red River of the South to protect downstream cities such as Shreveport and Alexandria. Second, the hydroelectric plant, with a capacity of 70 megawatts, generates electricity fed into the grid managed by the Southwestern Power Administration. Third, the reservoir, Lake Texoma, serves as a major raw water supply for municipalities on both sides of the state line, including entities like the North Texas Municipal Water District and the Tarrant Regional Water District.

Environmental and social impact

The creation of Lake Texoma flooded approximately 89,000 acres of river bottomland, displacing communities, submerging historic sites, and altering local ecosystems. This significantly impacted the habitats for species like the American alligator and various migratory birds, though the lake now supports a renowned fishery for species such as striped bass. Socially, the project transformed the region from agricultural bottomlands into a hub for tourism and lakeside development, boosting economies in cities like Denison and Durant. It also necessitated ongoing management of invasive species like zebra mussels and involves coordination with agencies like the U.S. Fish and Wildlife Service.

Lake Texoma

Lake Texoma is one of the largest reservoirs in the United States, with a surface area of about 89,000 acres and over 580 miles of shoreline. It is famously a "border lake," with portions lying in both Texas and Oklahoma. The lake is a premier destination for boating, fishing, and camping, hosted within areas like the Hagerman National Wildlife Refuge and Eisenhower State Park. Its waters are managed under a unique interstate compact, and it is a major economic engine for the region, supporting numerous marinas, resorts, and local businesses centered on recreation.

Category:Dams in Oklahoma Category:Dams in Texas Category:Buildings and structures in Grayson County, Texas Category:United States Army Corps of Engineers dams