| Hoopes Reservoir | |
|---|---|
 Hoopes Reservoir in spring | |
  Hoopes Reservoir  Hoopes Reservoir | |
| Location | New Castle County, Delaware, United States |
| Coordinates | 39°46′27″N 75°38′03″W / 39.77426°N 75.63425°W |
| Surface area | 187 acres (76 ha) |
| Water volume | 479,160,000 cubic feet (13,568,000 m3) |
Hoopes Reservoir is a reservoir in New Castle County, Delaware.
The reservoir first impounded the water of Old Mill Stream and Red Clay Creek in 1932, with a dam built by the city of Wilmington, Delaware, for municipal drinking water. It has a water surface of 187 acres (76 ha), a maximum capacity of 11,000 acre-feet (14,000,000 m3), and a normal capacity of 6,300 acre-feet (7,800,000 m3).[1] The reservoir and its surroundings have been open to the public since 1971.[2] It is the largest reservoir in Delaware.
The dam, Edgar M. Hoopes Dam (National ID # DE00015), is a concrete gravity dam originally built in 1932 and restructured several times since. It is 135 feet (41 m) high and 845 feet (258 m) in length at the crest.[1] Its namesake, Edgar M. Hoopes, was Chief Engineer of the Wilmington Water Department from 1913 through 1918, according to a plaque on site.[2]