Blue Marsh Lake Reservoir
| Reservoir Name | Blue Marsh Lake |
| Dam Name | Blue Marsh Dam |
| River | Tulpehocken Creek |
| Administration City | Pennsylvania |
| Country | United States |
| Year | 1977 |
| Dam Height | 30 |
| Dam Length | 541 |
| Area(Sqkm) | 3.2 |
| Area(Polygonal) | 3.2 |
| Capital Expenditure | 160.2 |
| Depth(M) | 50.1 |
| Avg Displacement Of Water | 7315 |
| Catchment Area In Sqkm | 485 |
| Main Usage | Flood control |
| Status | 3: Fair |
| Longitude | -76.037083 |
| Latitude | 40.382917 |
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