Coquitlam Dam

Last updated
Coquitlam Dam
Location Coquitlam, British Columbia
Coordinates 49°21′14″N122°46′37″W / 49.35389°N 122.77694°W / 49.35389; -122.77694 Coordinates: 49°21′14″N122°46′37″W / 49.35389°N 122.77694°W / 49.35389; -122.77694
Opening date1914
Operator(s) BC Hydro
Dam and spillways
Impounds Coquitlam River
Height31 m
Length290 m
Reservoir
Creates Coquitlam Lake
Surface area1100 ha

Coquitlam Dam is a hydraulic fill embankment dam on the Coquitlam River in the city of Coquitlam, British Columbia. Although it has no powerhouse of its own, its waters divert to Buntzen Lake, making it part of BC Hydro's electrical generation infrastructure. [1] It is also one of the main reservoirs for the Greater Vancouver Water District. BC Hydro has released a new document in March 2018 that addresses emergency preparedness and outlines the areas effected should the dam fail as a result of an extreme earthquake event. [2]

Contents

History

The first Coquitlam Dam, built to raise the water level of Coquitlam Lake by five feet, was begun in April 1904, and completed in 1905. It was built to protect the water supply to powerhouses on Indian Arm, via a tunnel to Buntzen Lake, and also supplied water to New Westminster. [3] By 1906 the original dam was discovered to be leaking, and while repairs were made the leak continued through 1908, until a second dam was completed in 1914. At the time of the tunnel's completion, it was the longest power diversion tunnel in the world. [3] Due to seismic concerns, an embankment dam was built on the downstream side of the original rockfill dam in 2008. [4]

The Port Moody-Coquitlam Railway, no longer operating, was built to assist with the dam's construction.

Related Research Articles

The British Columbia Hydro and Power Authority, operating as BC Hydro, is a Canadian electric utility in the province of British Columbia. It is the main electricity distributor, serving 1.8 million customers in most areas, with the exception of the City of New Westminster, where the city runs its own electrical department and portions of the West Kootenay, Okanagan, the Boundary Country and Similkameen regions, where FortisBC, a subsidiary of Fortis Inc. directly provides electric service to 213,000 customers and supplies municipally owned utilities in the same area. As a provincial Crown corporation, BC Hydro reports to the BC Ministry of Energy, Mines and Low Carbon Innovation, and is regulated by the British Columbia Utilities Commission (BCUC). Its mandate is to generate, purchase, distribute and sell electricity.

Mica Dam Dam in Mica Creek, British Columbia, Canada

Mica Dam, a hydroelectric embankment dam spanning the Columbia River 135 kilometres north of Revelstoke, British Columbia, Canada, was built as one of three Canadian projects under the terms of the 1964 Columbia River Treaty and is operated by BC Hydro. Completed in 1973 under the terms of the treaty, the Mica powerhouse had an original generating capacity of 1,805 megawatts (MW). Mica Dam, named after the nearby settlement of Mica Creek and its associated stream, in turn named after the abundance of mica minerals in the area, is one of the largest earthfill dams in the world. The reservoir for the dam is Kinbasket Lake, which was created when the dam was built. Water from the dam flows south directly into Revelstoke Lake, the reservoir for the Revelstoke Dam. Mica Dam is the tallest dam in Canada and second tallest in North America after the Chicoasén Dam in Mexico and it is the farthest upstream dam on the Columbia River. The dam's underground powerhouse was the second largest in the world at the time of its construction, and was the first 500 kV installation of sulphur hexafluoride (SF6) insulated switchgear in the world.

Revelstoke Dam Dam in Revelstoke, Canada

The Revelstoke Dam, also known as Revelstoke Canyon Dam, is a hydroelectric dam spanning the Columbia River, 5 km (3.1 mi) north of Revelstoke, British Columbia, Canada. The powerhouse was completed in 1984 and has an installed capacity of 2480 MW. Four generating units were installed initially, with one additional unit (#5) having come online in 2011. The reservoir behind the dam is named Lake Revelstoke. The dam is operated by BC Hydro.

Coquitlam River

The Coquitlam River is a tributary of the Fraser River in the Canadian province of British Columbia. The river's name comes from the word Kʷikʷəƛ̓əm which translates to "Red fish up the river". The name is a reference to a sockeye salmon species that once occupied the river's waters.

Coquitlam Lake

Coquitlam Lake is a reservoir located just north of Coquitlam, British Columbia. It is one of the three main water sources for Metro Vancouver, and part of the Coquitlam watershed. It is also a part of BC Hydro's power generation system. A tunnel directs water from the lake to nearby Buntzen Lake, and from there to a pair of power stations.

Reservoir Storage space for water

A reservoir is most commonly an enlarged natural or artificial lake created using a dam to store fresh water.

Bridge River Power Project

The Bridge River Power Project is a hydroelectric power development in the Canadian province of British Columbia, located in the Lillooet Country between Whistler and Lillooet. It harnesses the power of the Bridge River, a tributary of the Fraser, by diverting it through a mountainside to the separate drainage basin of Seton Lake, utilizing a system of three dams, four powerhouses and a canal.

Indian Arm Fjord in British Columbia

Indian Arm is a steep-sided glacial fjord adjacent to the city of Vancouver in southwestern British Columbia. Formed during the last Ice Age, it extends due north from Burrard Inlet, between the communities of Belcarra and the District of North Vancouver, then on into mountainous wilderness. Burrard Inlet and the opening of Indian Arm was mapped by Captain George Vancouver and fully explored days later by Dionisio Alcalá Galiano in June 1792.

Buntzen Lake

Buntzen Lake is a 4.8 kilometres (3 mi) long lake in Anmore, British Columbia, Canada, in the Greater Vancouver area. It is named after the first general manager of the B.C. Electric Co., Johannes Buntzen. There is a smaller lake just to the north named McCombe Lake.

Eagle Mountain, also known as Eagle Ridge, is the mountainous ridge with many indistinct summits between Buntzen Lake and Coquitlam Lake near Coquitlam, British Columbia. Its proximity to Coquitlam, and the houses being built on its southern slopes, make it a very popular weekend destination for hiking, mountain biking, horseback riding, and ATV riding. There is a network of logging roads leading up the south side of the summit to a plateau area with lakes, hiking trails and mountain biking trails.

Jordan River Dam Dam on the Jordan River, British Columbia, Canada

The Jordan River Dam, officially the Jordan River Diversion Dam, and known locally simply as Diversion Dam, is a dam located in Jordan River, British Columbia, Canada. It is part of the second hydroelectric development on Vancouver Island.

Culmback Dam Dam in Snohomish County, Washington

The Culmback Dam is a large rockfill hydroelectric and water supply dam on the Sultan River, a tributary of the Skykomish River, in Washington. Built in 1965, the dam is 640 feet (200 m) long at the crest and 262 feet (80 m) high. Its reservoir, Spada Lake, provides water for 70 to 75 percent of Snohomish County and feeds the Jackson Hydro Project, providing 112 megawatts of clean energy to Snohomish county. Some critics charge that the dam has strongly impacted the runs of salmon and other migratory fish in the Sultan River by depleting gravel and sediment needed to line the riverbed. The dam's operator counters that Culmback Dam dramatically reduces flooding events, benefiting fish populations and the surrounding communities. The dam was named in honor of George Culmback, a former mayor of Everett.

Lubbe Powerhouse

The Goldstream Powerhouse is a decommissioned hydroelectric plant located near Goldstream Provincial Park in Langford, near Victoria, British Columbia. This plant provided electricity to Victoria for 60 years and is one of the little-known and ingenious chapters in the history of Victoria. This plant was one of the first hydro plants of this type on the west coast of North America. The structure is over a century old and is unsafe to inhabit. It is within the boundaries of the watershed lands owned by the CRD and is inaccessible to the public due to its proximity to a drinking water reservoir.

Ruskin Dam and Powerhouse Dam in Ruskin, British Columbia

Ruskin Dam is a concrete gravity dam on the Stave River in Ruskin, British Columbia, Canada. The dam was completed in 1930 for the primary purpose of hydroelectric power generation. The dam created Hayward Lake, which supplies water to a 105 MW powerhouse and flooded the Stave's former lower canyon, which ended in a small waterfall approximately where the dam is today.

Stave Falls Dam and Powerhouse Dam in Stave Falls

Stave Falls Dam is a dual-dam power complex on the Stave River in Stave Falls, British Columbia, Canada. The dam was completed in 1912 for the primary purpose of hydroelectric power production. To increase the capacity of Stave Lake, the dam was raised in 1925 and the Blind Slough Dam constructed in an adjacent watercourse 500 m (1,600 ft) to the north, which was the site of the eponymous Stave Falls. In 2000, the dam's powerhouse was replaced after a four-year upgrade. The powerhouse was once British Columbia's largest hydroelectric power source and is a National Historic Site of Canada.

Kootenay Canal Dam in Kootenays, British Columbia, Canada

The Kootenay Canal is a hydroelectric power station, located 19 km downstream of Nelson, British Columbia, Canada. Where the Kootenay River flows out of the reservoir formed by the Corra Linn Dam on Kootenay Lake., a canal diverts water to BC Hydro's Kootenay Canal Generating Station. Its construction was a result of the Duncan Dam and Libby Dam providing year round flows into Kootenay Lake. The powerhouse was completed in 1976.

John Hart Dam Dam in Campbell River, British Columbia, Canada

The John Hart Dam is one of three hydroelectric dams on the Campbell River, located on Vancouver Island in British Columbia, Canada. The dam is located at the outflow of John Hart Lake. The John Hart Generating Station is located nearby.

Metro Vancouver watersheds

The Metro Vancouver watersheds, also known as the Greater Vancouver watersheds, supply potable water to approximately 2.4 million residents in the Lower Mainland of British Columbia. They provide tap water to a land area covering more than 2,600 km², including Vancouver, Langley and Richmond. Metro Vancouver serves a total of 21 member municipalities, one electoral district, and one treaty First Nation. From west to east, the watersheds are the Capilano, the Seymour, and the Coquitlam. They are located in the North Shore Mountains and Coquitlam Mountain, respectively. Each watershed possesses a reservoir for water storage purposes, under the control of Metro Vancouver. The reservoirs are supplied by about 3.5 metres of rain and 4.5 metres of snowpack annually. Two additional off-catchment areas under control of Metro Vancouver contribute to the water supply. The watersheds have a long history of controversies surrounding logging, highway development, and salmon run conservation.

Waneta Dam Expansion is a two-unit powerplant which started construction in winter of 2010/11 just downstream of the existing Waneta Dam on the Pend d'Oreille River. The dam generates power from water that would otherwise be spilled from the existing project, and is delivered to the BC Hydro grid via a separate 10km long 230kV transmission line. The expansion project is a partnership, with Fortis Inc. holding a 51% share in the project and the two Crown agencies Columbia Power Corporation and Columbia Basin Trust holding a 32.5% and 16.5% share, respectively. SNC-Lavalin designed and built the project. In January 2019, Columbia Power and Columbia Basin Trust announced that they had agreed to purchase Fortis Inc.’s 51% interest in the facility. The purchase was concluded in April 2019.

Ford Lake Dam Dam in 2635 Bridge RoadYpsilanti Charter Township, Washtenaw County, Michigan

The Ford Lake Dam is an earthen, multi-arch hydroelectric gravity dam and powerhouse crossing the Huron River in Ypsilanti Charter Township in Washtenaw County in the U.S. state of Michigan. The dam was constructed in 1931–1932 and created the Ford Lake reservoir at 975 acres (395 ha).

References

  1. BC Hydro: Coquitlam River and Buntzen Lake Watersheds Archived 2007-10-13 at the Wayback Machine Retrieved on 22 February 2009
  2. "Coquitlam Dam Emergency Flood Map" (PDF).
  3. 1 2 Will Koop: Coquitlam Watershed History Archived 2006-10-07 at the Wayback Machine Retrieved on 22 February 2009
  4. BC Hydro: Coquitlam Dam Seismic Upgrade Archived 2009-02-15 at the Wayback Machine Retrieved 12 March 2009