Lake Walter E. Long
General data
- Name: Lake Walter E. Long
- Water system: Colorado River (Texas)
- Water type: Artificial lake
- Progression: Decker Creek -> Gilleland Creek -> Colorado River (Texas) -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical
- Continents: North America
- Countries: United States of America
Lake Walter E. Long (also known as Decker Lake) is a reservoir on Decker Creek in Austin, Texas. It was officially impounded in 1967 and provides cooling water for a power plant that produces electricity from petroleum-based fuels. The dam and the lake are managed by the City of Austin. Surrounding the lake is the city's Lake Walter E. Long Metropolitan Park, a popular recreational destination.
Lake Walter E. Long has been stocked with species of fish intended to improve the utility of the reservoir for recreational fishing. Fish present in Lake Walter E. Long include catfish, largemouth bass, hybrid striped bass, and sunfish. Plant species present in the lake water include hydrilla, pondweed, bulrush, waterstar grass, American lotus, coontail, and southern naiad.