Twin Buttes Dam and Reservoir, features of the San Angelo Project, are located immediately upstream from the Nasworthy Reservoir, about 6 miles southwest of San Angelo, Texas. Twin Buttes Dam controls the flows of the South and Middle Concho Rivers and Spring Creek. Although the reservoir has only reached full capacity twice, back in hte 1970's, the full lake has approximately 9,800 water surface acres, 3,219 land acres and 55 miles of shoreline. It is accessible from numerous roads. There are very limited recreational facilites around Twin Buues Reservoir. Camping is allowed, but there ate no developed campsies or hook-ups. Most public recreational facilites i the area are located around Lake Nasworthy just below Twin Buttes Dam. Open year-around for fishing. Available species include bass, crappie, sunfish, catfish, carp, shad, and drum. All project facilities are managed for the Bureau of Reclamation by the City of San Angelo. Current reservoir levels.