JOHN DAY DAM

'John Day Dam' is a hydroelectric dam spanning the Columbia River in the northwestern United States. The dam features a navigation lock plus fish ladders on both sides. The reservoir impounded by the dam is Lake Umatilla, and it runs 76.4 miles (123 kilometers) up the river channel to the foot of the McNary Dam.
John Day Dam is part of the Columbia River Basin system of dams.

Contents

Location

History

Gallery

Statistics

See also

References

External links

Location

John Day Dam is located 28 miles (45 km) east of the city of The Dalles, Oregon, and just below the mouth of the John Day River. The closest town on the Washington side is Goldendale, 20 miles (32 km) north. It joins Sherman County, Oregon with Klickitat County, Washington, 216 miles (348 kilometers) upriver from the mouth of the Columbia near Astoria, Oregon.
The United States Geological Survey has two entries for John Day Dam:

★ Sherman County, Oregon at , at an elevation of 164 ft. (50 m), and

★ Klickitat County, Washington at , at an elevation of 269 ft. (82 m).

History

Construction of the dam began in 1958 and was completed in 1971, (making it the newest dam on the lower Columbia), at a total cost of US$511 million. John Day Dam was built and is operated by the U.S. Army Corps of Engineers. The dam's power generation capacity is 2,160,000 kW.

Gallery

Statistics

★ Altitude: 266 feet (81 m) above sea level

★ Height: 183 feet (56 m)

★ Length: 7,365 feet (2,327 m)

★ Navigation lock:

★
★ Single-lift

★
★ 86 feet (26 m) wide

★
★ 675 feet (206 m) long

★ Powerhouse

★
★ Sixteen 135,000-kilowatt units

★
★ Total capacity: 2,160 megawatts

★
★ Overload capacity: 2,485 MW

★ Spillway

★
★ Gates: 20

★
★ Length: 1,228 feet (374 m)

See also

★ Hydroelectric dams on the Columbia River

References

★

★

External links

★ John Day Dam U.S. Army Corps of Engineers

★ Google Maps