Sherwood Dam
| Lake Sherwood Dam | |
|---|---|
Lake Sherwood Dam in 1907. Photograph by John Sparhawk Appleton. | |
| Country | United States |
| Location | Ventura County, California |
| Coordinates | 34°08′21″N 118°51′26″W / 34.13917°N 118.85722°W |
| Status | Operational |
| Opening date | 1904 |
| Construction cost | $2,000 (1904) |
| Owner(s) | Lake Sherwood Association |
| Dam and spillways | |
| Type of dam | Arch, constant-radius |
| Impounds | Mishe Mokwa Creek, Potrero Valley Creek |
| Height | 45 ft (14 m) |
| Length | 270 ft (82 m) |
| Reservoir | |
| Creates | Lake Sherwood |
| Total capacity | 2,600 acre⋅ft (3,200,000 m3) |
Sherwood Dam, known also as Lake Sherwood Dam, Alturas Dam, and Potrero Dam, is a 270-foot-long (82 m) concrete arch dam in the Santa Monica Mountains near Thousand Oaks, California. Completed in 1904, its construction led to the creation of the 165-acre (67 ha) Potrero Lake (since renamed Lake Sherwood) over the following winter. It was the first reservoir of its size in the area, and remains one of the oldest standing dams in California.