Pertinent Data LAKE TEXOMA (DENISON DAM) OKLAHOMA AND TEXAS Location: On the Red River at river mile 725.9, 5 miles northwest of Denison in Grayson County, Texas. Purpose: Flood control, water supply, hydroelectric power, regulation of Red River flows, improvement of navigation, and recreation. Status: Complete. History of Construction: Construction began in August 1939 and was completed in February 1944. The project was first available to operate for full flood control without any restrictions in January 1944. The first hydroelectric turbine was placed on line in March 1945 and the second in September 1949. Construction of a highway bridge across Lake Texoma at the Willis Ferry site started 24 April 1958 and was completed 30 October 1960. The 5,426-foot-long bridge replaces a former crossing south of Woodville, Oklahoma, on Oklahoma State Highway 99 and Texas State Highway 91. The roadway surface is about 37 feet above the top of the power pool. Type of Structure: The structure is a rolled earthfill embankment with a rock- protected upstream slope. The main embankment is 15,200 feet long. The maximum height of the structures is 165 feet above the streambed. A rolled earthfill dike 5,870 feet long and 15 feet high is located in the vicinity of Platter, Oklahoma. The Cumberland levee is 23,480 feet long with a crest elevation of 647.0. Highway 75A crosses the top of the dam. Spillway and Control Works: The uncontrolled spillway is a concrete, gravity, chute-type structure, 2,000 feet long, located in a saddle on the right bank. Spillway capacity at maximum pool (elevation 666.4) is l,050,000 cfs. The outlet works consist of three 20-foot-diameter, concrete conduits through the embankment equipped with six 9- by 19- foot vertical lift gates and one emergency gate. Capacity of the outlet works is 67,500 cfs at the top of the flood control pool and 60,120 cfs at the top of the power pool. Limiting channel capacity below Denison Dam is about 60,000 cfs. Hydrologic Data: The estimated peak discharge for the May through June 1980 flood was 470,000 cfs. The volume was 8,517,000 acre-feet which is equivalent to 4.73 inches of runoff. The peak inflow for the May 1990 flood was 300,000 cfs with a volume of 5,087,000 acre- feet. The peak inflow for the May through June 1987 flood was 315,000 cfs with a volume of 2,879,000 acre-feet. The total volume of inflow for the 1957 flood was 8,364,000 acre-feet. Lake Data: Based on 1985 sedimentation survey. Feature Elevation (feet) Acres (acres) Capacity (acre-feet) Equivalent Runoff (1) (inches) Top of Dam 670.0 - - - Maximum Pool 666.4 - - - Top of Flood Control Pool 640.0 141,418 5,194,163 2.88 Flood Control Storage 617.0-640.0 - 2,613,777 l.45 Top of Power Pool 617.0 86,910 2,580,386 (2) l.43 Conservation Storage 590.0-617.0 - l,570,216 (3) 0.87 Bottom of Power Pool 590.0 42,787 1,010,170 0.56 (1) From a 39,719-square-mile drainage area upstream from the dam; 33,783 square miles contributing. (2) Excludes inactive storage in Cumberland pool. (3) Includes 150,000 acre-feet for water supply (150.0 mgd yield). Power Data: The powerhouse contains two 35,000 kilowatt generators, with provisions for three additional 43,000 kilowatt units. One 20- foot-diameter steel-lined conduit provides water for each power unit. Each of the five power conduits is equipped with two 9- by 19-foot vertical life gates located in the intake structure. The powerhouse and power conduits are located adjacent to the outlet works near the right abutment. Additional power data are as follows: Item Amount Required Flow for Firm Energy, average cfs 1,800 Average Net Power Heads, feet        Power Pool, full 103.2      Power Pool, empty 75.0      Critical Hydroperiod 92.2 Dependable Capacity, kW 54,000 Installed Capacity, kW 70,000 Potential Capacity, kW 199,000 Average Annual Firm Energy, kWh 126,470,000 Document Date: August 9, 1996 Data: September 1993 Click here for more information on Lake Texoma from the US Army Corps of Engineers. Member of Texoma WestEnd .