The Moyie Dam is located on the Moyie River about one and
one-half miles upstream of its confluence with the Kootenai River. Moyie
Dam is a 92-foot-high concrete gravity dam that impounds a small reservoir,
approximately one mile long. The length of the top of the Dam along the
walkway at elevation 2040 is 376 feet.
Powerhouses There are three powerhouses located about 1000 feet downstream. The powerhouses were constructed in 1921, 1941, and 1982 respectively. Four hydroelectric turbines are located in the powerhouses with two units in Powerhouse Two and one unit each in Powerhouses One and Three. The nameplate capacity of the units totals 3950 KW.
Spillway The Dam has an ogee spillway with a crest 17 feet below the top of the dam. The spillway length is 95.5 feet. Piers supporting the walkway divide the spillway into nine segments. A concrete training wall on the spillway separates the spillway flow with four crest segments flowing onto the west half of the spillway and five onto the east. The spillway has the capacity of 19,800 cfs at 2037.5 feet with 2.5 feet of residual freeboard.
Information for the Moyie Dam is from the City of Bonners Ferry, Idaho
Dam is owned and operated by the Seattle District, U.S. Army Corp of Engineers,
and is located in northwestern Montana on the Kootenai River 17 miles upstream
of Libby, Montana. Construction on the dam commenced in April 1967 and was
completed in July 1973. Construction of the powerhouse began in May 1972 and was
completed in July 1976. The dam was dedicated and first power was on line in
Libby Dam is a concrete gravity
structure designed by the Seattle District, U.S. Army Corps of Engineers. The
primary function of the project is to generate hydroelectric power and to serve
as flood control for the Kootenai River.
Powerhouse Power is
produced by five 105,000 kilowatt (kw) generators, with space available for
three additional units of the same size. Currently a fifth unit is being
installed by Allis-Chalmers, Hydro-Turbine Division.
Operation Reservoir operations are centralized in the Reservoir Control Center (RCC) of the Army Corps of Engineers, North Pacific Division. The physical operation of the project within the approved limits is accomplished by project personnel. Should an emergency occur or appear to be developing, the project engineer or an assistant will promptly contact the RCC to report field conditions and receive instructions. Bonneville Power Administration and other parties upstream and downstream of the project that may be affected by the emergency will also be informed as soon as possible.
Libby Dam Construction
Flood control is an important
function of the Libby Dam and Moyie Dam projects. Their reservoirs are managed to alleviate flooding below the
dams, and is a part of the regional flood control system of the Kootenai River
Source information for the Libby
Dam is from the Emergency Action and Notification Subplan manual. (U.S. Army
Corps of Engineers)
Smith Creek Power System Smith Creek Power System is a power generation station owned by Eugene City Water and Electric, Eugene, Oregon. The plant has a small diversion dam on Smith Creek and approximately three miles of penstock to the power station. The power station produces 34 megawatts of power. The plant is operated and maintained by Dominion, a large company that manages power generation plants.