Granger Lake (Brazos River Basin)
Granger Lake, formerly known as Laneport Lake, is located approximately seven miles east of the city of Granger in Williamson County, on the San Gabriel River, a tributary of the Brazos River. The dam and lake were built and are owned by the United State government, and operated by the U.S. Army Corps of Engineers for flood control, water supply and recreational purposes. Authorization to build Laneport Lake was originally approved in the Flood Control Act by the U. S. Congress on 3 September 1954. Construction began in 1972 and completion is estimated in 1977. Deliberate impoundment started in the same year. However, the project was placed into operation in 1980. The earthfill dam, including the spillway, is 16,320 feet long with a maximum height of 115 feet above the streambed. At top of conservation pool, elevation 504.0 feet above mean sea level, the lake will cover 4,203 surface acres and store 50,779 acre-feet water. The dam controls a drainage area of approximately 709 square miles.