Thompson Falls Dam

Last updated

Thompson Falls Dam is a dam in Sanders County, Montana, in the northwestern part of the state.

Sanders County, Montana County in the United States

Sanders County is a county in the U.S. state of Montana. As of the 2010 United States Census, the population was 11,413. Its county seat is Thompson Falls. The county was founded in 1905.

A complex of four hydropower dams stand on the Clark Fork River in downtown Thompson Falls, Montana:

Thompson Falls, Montana City in Montana, United States

Thompson Falls is a city in and the county seat of Sanders County, Montana, United States. The population was 1,313 at the 2010 census.

Operations here began in 1915 with original construction on a set of natural falls. Today, the four dams together impound an upstream reservoir, with a water storage capacity of 8300 acre-feet, and a seven-unit hydroelectric generation capacity of 94 megawatts. [1]

Montana Power Company originally built the dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014. The island between the dams contains a public park with hiking trails, picnic tables, and scenic overlooks. [2]

The Montana Power Company (MPC) was an electric utility company based in Butte, Montana which provided electricity to Montana consumers and industry from 1912 to 1997.

PPL Corporation

The PPL Corporation is an energy company headquartered in Allentown, Pennsylvania, United States. It currently controls about 8,000 megawatts of regulated electric generating capacity in the United States and delivers electricity to 10.5 million customers in Pennsylvania, Kentucky, and Great Britain. It also provides natural gas delivery service to 321,000 customers in Kentucky. PPL Electric Utilities is the PPL Corporation's primary subsidiary.

NorthWestern Corporation owns NorthWestern Energy, a utility company that serves South Dakota, Nebraska, and Montana that is based in Sioux Falls. As of December 31, 2007, the company serves approximately 650,000 customers. The company's corporate headquarters are located in Sioux Falls while the headquarters for the South Dakota operations are in Huron, SD.

Related Research Articles

The Twin Falls are a pair of waterfalls, 175 ft (53 m) high, that are located on the Unknown River, a tributary of the Churchill River that drains the central Labrador basin and flows into Lake Melville and the Atlantic Ocean. Hydroelectric power development rights on the river were acquired by the British Newfoundland Development Corporation (Brinco) in the 1950s. In partnership with Wabush Mines Limited and the Iron Ore Company of Canada, the two mining corporations operating in Western Labrador, Brinco created the Twin Falls Power Corporation to deliver power 115 miles (185 km) west to the two mining operations being developed near the Labrador-Quebec border.

Colorado-Big Thompson Project

The Colorado-Big Thompson Project is a federal water diversion project in Colorado designed to collect West Slope mountain water from the headwaters of the Colorado River and divert it to Colorado's Front Range and plains. In Colorado, approximately 80% of the state's precipitation falls on the West Slope, in the Rocky Mountains, while around 80% of the state's growing population lives along the East Slope, between the cities of Fort Collins and Pueblo.

Spokane Falls

Spokane Falls is the name of a waterfall and dam on the Spokane River, located in the central business district in downtown Spokane, Washington. The city of Spokane was also initially named "Spokane Falls".

Willow Creek Pass is a mountain pass on the border between Lincoln and Sanders Counties in the U.S. state of Montana. Located at 47°53′27″N115°17′1″W, its elevation is 3,707 feet (1,130 m). The pass is near the head of Willow Creek. The pass is approximately 18.8 miles from Thompson Falls and near the community of Sanders.

Rainbow Dam

Rainbow Dam is a hydroelectric dam on the Missouri River, 29 feet (8.8 m) high and 1,055 feet (322 m) long, located six miles northeast of Great Falls in the U.S. state of Montana. The dam is named for the downstream Rainbow Falls, a 45 ft (14 m) waterfall that is the third of the five Great Falls of the Missouri. Built in 1910, the dam furnishes water to an eight-unit hydroelectric plant with a capacity of 36 megawatts. As the dam's power plant is located over a half-mile downstream, the flow of water over Rainbow Falls and downstream Crooked Falls is significantly reduced during the dry season. The water from the penstocks re-enters the river a few hundred yards east of Crooked Falls. Montana Power Company acquired the dam when it was founded in 1912, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014.

Holter Dam

Holter Dam is a hydroelectric straight gravity dam on the Missouri River about 45 miles (72 km) northeast of Helena, Montana, in the United States. The dam, which was built between 1908 and 1918, is 1,364 feet (416 m) long and 124 feet (38 m) high. The reservoir formed by the dam, Holter Lake is 25 miles (40 km) long and has a storage capacity of 243,000 acre feet (300,000,000 m3) of water when full. The dam is a "run-of-the-river" dam because it can generate electricity without needing to store additional water supplies behind the dam.

Black Eagle Dam

Black Eagle Dam is a hydroelectric gravity weir dam located on the Missouri River in the city of Great Falls, Montana. The first dam on the site, built and opened in 1890, was a timber-and-rock crib dam. This structure was the first hydroelectric dam built in Montana and the first built on the Missouri River. The dam helped give the city of Great Falls the nickname "The Electric City." A second dam, built of concrete in 1926 and opened in 1927, replaced the first dam, which was not removed and lies submerged in the reservoir. Almost unchanged since 1926, the dam is 782 feet (238 m) long and 34.5 feet (10.5 m) high, and its powerhouse contains three turbines capable of generating seven megawatts (MW) of power each. The maximum power output of the dam is 18 MW. Montana Power Company built the second dam, PPL Corporation purchased it in 1997 and sold it to NorthWestern Corporation in 2014. The reservoir behind the dam has no official name, but was called the Long Pool for many years. The reservoir is about 2 miles (3.2 km) long, and has a storage capacity of 1,710 acre feet (2,110,000 m3) to 1,820 acre feet (2,240,000 m3) of water.

Madison Dam

Madison Dam is a hydroelectric dam on the Madison River in Madison County, Montana, in the southwestern part of the state.

Point View Dam is a dam in Wayne, Passaic County, New Jersey.

Willow Creek Dam is a dam in Lewis and Clark County, Montana.

Como Dam

Como Dam is a dam in Ravalli County, Montana, in the far western part of the state.

Sly Creek Dam is a dam in Butte County, California.

Kicking Horse Dam is a dam in Lake County, Montana.

Orwell Dam

Orwell Dam is a dam in Otter Tail County, Minnesota, about six miles southwest of Fergus Falls.

Black Canyon Diversion Dam

Black Canyon Diversion Dam is a dam in Gem County, Idaho.

Willow Creek Dam (Colorado) Dam in Colorado

Willow Creek Dam is a dam in Grand County, Colorado.

Swift Dam is a dam in Pondera County, Montana, on the southern end of the Blackfeet Indian Reservation.

Soda Dam, also known as Alexander Dam, is a dam in Caribou County, Idaho, directly west of the town of Soda Springs.

International Control Dam

The International Control Dam, also known as the International Control Structure, operated by Ontario Power Generation, is a weir that controls the water diversions from the Niagara River and dispatches the water between the New York Power Authority and Ontario Power Generation in accordance with the terms of the 1950 Niagara Treaty. It was completed in 1954.

References

Coordinates: 47°35′29″N115°21′01″W / 47.59149°N 115.35020°W / 47.59149; -115.35020

Geographic coordinate system Coordinate system

A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.