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The dam is located approximately 4 miles (6 km) northeast of Orofino and impounds the Dworshak Reservoir for flood control and hydroelectricity generation. With a height of 717 feet (219 m), Dworshak is the third tallest dam in the United States and the tallest straight-axis concrete dam in the Western Hemisphere.he reservoir is required to maintain a minimum of 700,000 acre feet (0.86 km 3) of winter flood-storage space, and dam releases are operated so that water levels reach a maximum of 1,570 feet (480 m) in July.
The Kenney Dam, 7 km south of the recreation site, was an impressive feat of engineering when it was built in the early 1950s. With four million cubic yards of material and standing over 90 metres high, it was the largest rock-filled dam in the world.here are no park facilities at Nechako Canyon, but just outside the protected area off the Holy Cross Road, is the Cheslatta River Recreation Site. This popular camping site is actually on land owned by Alcan, the company behind the construction of Kenney Dam and the reservoir development of the area.