Lower Monumental: Snake River, WA
Owner: U.S. Army Corps of Engineers
Type: Federal
Year Started: 1969
Location: Snake River
State: Washington
Capacity: 810 MW
Lower Monumental Web Page
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.