Nicasio Reservoir
 |
| Nicasio Reservoir | |
|---|---|
| Location | Marin County, California |
| Coordinates | 38°04′36″N 122°45′16″W / 38.07667°N 122.75444°W |
| Type | reservoir |
| Primary inflows | Nicasio Creek |
| Primary outflows | Nicasio Creek |
| Basin countries | United States |
| Surface elevation | Template:Converta |
Nicasio Reservoir is a large, shallow water man-made reservoir formed by the building of a 130-foot high dam on the Nicasio Creek in 1961 in the Nicasio Valley in Marin County, California, amid much controversy among longtime residents of the area.[citation needed] The Marin Municipal Water District (MMWD) forced the displacement of many farms, including the McIsaac family farm, on which the majority of the reservoir sits.[citation needed]
The controversy stems from the fact that water from the reservoir is rarely used by the MMWD, being considered a "back-up" source for times of severe drought (1975-1977, etc).[citation needed]
In addition, the building of this dam on Nicasio Creek wiped out the spawning salmon population in this area. There was an abbreviated attempt by the district to trap the salmon below the dam and transport them by truck further up Nicasio Creek and also Halleck Creek which was ultimately unsuccessful.[citation needed]
The reservoir is still used for recreational purposes; mainly fishing and hiking.