| Triadelphia Reservoir | |
|---|---|
 | |
  Triadelphia Reservoir  Triadelphia Reservoir | |
| Location | Howard / Montgomery counties, near Brookeville, Maryland |
| Coordinates | 39°12′27″N 77°00′48″W / 39.207517°N 77.013302°W |
| Type | reservoir |
| Primary inflows | Patuxent River |
| Primary outflows | Patuxent River |
| Catchment area | 77.3 sq mi (200 km2) |
| Basin countries | United States |
| Surface area | 800 acres (3.2 km2) |
| Average depth | 52 ft (16 m) |
| Water volume | 6,200,000,000 US gal (0.023 km3) |
| Surface elevation | 351 ft (107 m) |
Triadelphia Reservoir is located on the Patuxent River, in Howard County and Montgomery County, Maryland near the town of Brookeville.
The reservoir was created in 1943 by the construction of the Brighton Dam on the Patuxent.[1]
- ^ Washington Suburban Sanitary Commission. Laurel, MD. "The WSSC -- A Thumbnail History." June 2007.