Rahul Sharma (Editor)

Lower Monumental Dam

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Opening date
  
1969

Height
  
30 m

Length
  
1,155 m

Phone
  
+1 509-282-3218

Impounds
  
Opened
  
1969

Construction began
  
June 1961


Location
  
Operator(s)
  
Type of dam
  
Concrete gravity, run-of-the-river

Spillway type
  
Service, gate-controlled

Address
  
5220 Devils Canyon Rd, Prescott, WA 99335, USA

Similar
  

Preparing to replace lock gate at lower monumental dam


Lower Monumental Lock and Dam is a hydroelectric, concrete, run-of-the-river dam on the Snake River, and bridges Franklin County and Walla Walla County, in the state of Washington. The dam is located six miles (10 km) south of the town of Kahlotus, and 43 miles (69 km) north of the town of Walla Walla.

Contents

Construction began in June 1961. The main structure and three generators were completed in 1969, with an additional three generators finished in 1981. Generating capacity is 810 megawatts, with an overload capacity of 932 MW. The spillway has eight gates and is 572 feet (176 m) long.

Lower Monumental Dam is part of the Columbia River Basin system of dams.

Lake Herbert G. West, which extends 28 miles (45 km) east to the base of Little Goose Dam, is formed behind the dam. Lake Sacajawea, formed from Ice Harbor Dam, runs 35 miles (56 km) southwest, downstream from the base of the dam.

Navigation lock
  • Single-lift
  • 86 feet (26 m) wide
  • 666 feet (203 m) long
  • Lower monumental dam


    References

    Lower Monumental Dam Wikipedia


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