Hennessey Reservoir
| Reservoir Name | Hennessey |
| Dam Name | Conn Creek |
| River | Conn Creek |
| Administration City | California |
| Country | United States |
| Year | 1946 |
| Dam Height | 38 |
| Dam Length | 213 |
| Area(Sqkm) | 2.8 |
| Area(Polygonal) | 2.8 |
| Capital Expenditure | 38.2 |
| Depth(M) | 13.6 |
| Avg Displacement Of Water | 785 |
| Catchment Area In Sqkm | 126 |
| Main Usage | Irrigation |
| Status | 2: Good |
| Longitude | -122.38125 |
| Latitude | 38.487083 |
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