It is a 193-foot (59 m) tall earthfill dam that was completed in 1961. The reservoir has a capacity of 40,662 acre feet (50,156,000 m3). The watershed has an area of 20.6 square miles (53 km²). It provides drinking water for the city of San Luis Obispo, the California Men's Colony, Cal Poly, and the Cayucos Area Water Organization.. "/>