Triadelphia Reservoir (800 acres) is located on the Patuxent River, near the town of Brookeville Maryland.

Triadelphia and its sister impoundment Rocky Gorge are maintained as a drinking water source by the Washington Suburban Sanitary Commission (WSSC).

Triadelphia Reservoir is also known as Tridelphia Reservoir.

Triadelphia Reservoir Fish Species

Triadelphia Reservoir contains largemouth bass, smallmouth bass, northern pike, chain pickerel, yellow perch, white perch, channel catfish, and other species.


Special regulations apply to Triadelphia Reservoir. For more information, visit the Washington Suburban Sanitary Commission website (

Information about Triadelphia Reservoir fishing and other recreation is also available at:

Brighton Dam Information Center
2 Brighton Dam Road
Brookville, MD 20833

Related Information

Maryland Freshwater Fishing

Patuxent River