Capacity
Ocoee Dam No. 3 is a concrete gravity diversion-type dam 110 feet (34 m) high and 612 feet (187 m) long, and has a generating capacity of 28,800 kilowatts. The dam's concrete overfall spillway has a discharge capacity of 95,000 cubic feet per second (2,700 m3/s), 1,560 cubic feet (44 m3) of which is via the dam's two 5-foot (1.5 m) by 7-foot (2.1 m) sluice gates located near the bottom of the dam. Ocoee Reservoir No. 3 has 360 acres (150 ha) of water surface and 24 miles (39 km) of shoreline. Major recreational releases are typically scheduled for weekends during the Summer months.
The powerhouse of Ocoee No. 3 was built 4.2 miles (6.8 km) downstream from the dam in order to obtain maximum utilization of the elevation loss along this stretch of the river. A high pressure conduit— most of which flows through a 12-foot (3.7 m) by 12-foot (3.7 m) tunnel carved into the mountainside— carries the water from the reservoir at a relatively steady elevation. The water emerges from the tunnel at a point 2.5 miles (4.0 km) from the reservoir intake and drops 180 feet (55 m) through a steel penstock to the powerhouse's lone turbine.
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