Southern black racer (scientific name: "Coluber constrictor"), the racer is more likely to suffocate or crush its victim into the ground, rather than coiling around it in typical constrictor fashion. Man remains the greatest enemy of black racers. Many are killed on highways and others are intentionally killed out of fear. The white chin causes some people to kill this snake, believing that it is a cottonmouth – a venomous snake more commonly called a water moccasin. The venomous snake has a white lining inside of its mouth. Racers are nonvenomous and do not breed with cottonmouths. Natural enemies include such birds of
Moccasin Dam its water is imported through the Hetch Hetchy Project pipelines. In order to protect the high-quality Hetch Hetchy water, local flows from Moccasin Creek are captured upstream and routed through a bypass system that discharges downstream of Moccasin Dam. The bypass includes a small hydroelectric plant with a capacity of 2.9 megawatts (MW). The main Moccasin Powerhouse is situated at the eastern (upstream) end of the reservoir, and consists of two units with a total capacity of 100 megawatts. In 2004, the powerhouse generated 391 million Kilowatt hours (KWh). In 2009, it generated 348 million KWh. Moccasin is the furthest