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Lake Texoma

Man-made lake on Red river in Texas, US

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  • 7 chapters

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Through Reservoir

Hydrology

Tributaries and outlet

Lake Texoma's two main sources are the Red River from the west and Washita River from the north. Its other notable sources include Big Mineral Creek, Little Mineral Creek, Buncombe Creek, Rock Creek, and Glasses Creek. Lake Texoma drains into the Red River at the Denison Dam.

Water levels

Normal elevation of the conservation pool varies from 615 to 619 ft (187 to 189 m) National Geodetic Vertical Datum depending on the time of year. The flood control pool extends to elevation 645 ft (197 m). The lake has crested the dam's spillway at a height of 640 ft (200 m) five times - once in 1957, 1990, and 2007, and on May 24 and June 18, 2015. (USACE 2003a) The lake's previously highest elevation was recorded on May 6, 1990, at 644.76 feet. This record was broken on May 29, 2015, and the lake crested on June 1, 2015, at a new record elevation of 645.72 feet. The top of Denison Dam is at 670 feet.

Saltwater from the Red River

The Red River that formed Lake Texoma is a saltwater river due to salt deposits left over from a 250-million-year-old former sea that was in the current Texas-Oklahoma border region. As time passed, that sea evaporated, leaving salts deposits — mostly sodium chloride. Rock and silt eventually buried the deposits, but the salts continue to leach through natural seeps in tributaries above Lake Texoma, sending as much as 3,450 tons of salt per day flowing down the Red River. The problem with the water in the Red River is much of it is too salty and requires costly treatment, if it is usable at all. Due to this phenomenon, striped bass, a saltwater fish species, thrives in Lake Texoma. Lake Texoma is home to the only self-sustaining population of striped bass in Texas.

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