Kenney Dam

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Kenney Dam.jpg
Kenney Dam
LocationSouth of Fraser Lake, British Columbia, Canada
Coordinates 53°34′45″N124°57′0″W / 53.57917°N 124.95000°W / 53.57917; -124.95000
Opening date1954
Owner(s)Rio Tinto Alcan
Dam and spillways
Type of dam Rock-fill embankment
Impounds Nechako River
Height97 m (318 ft)
Length457 m (1,499 ft)
Reservoir
Creates Nechako Reservoir
Total capacity32.7 km3 (26,500,000 acre⋅ft)
Power Station
Turbines 8 × 112 MW
Installed capacity 890 MW

The Kenney Dam is a rock-fill embankment dam on the Nechako River in northwestern British Columbia, built in the early 1950s. The impoundment of water behind the dam forms the Nechako Reservoir, [1] which is also commonly known as the Ootsa Lake Reservoir. The dam was constructed to power an aluminum smelter in Kitimat, British Columbia by Alcan (now Rio Tinto Alcan), although in the late 1980s the company increased their economic activity by selling excess electricity across North America. [2] : 128  The development of the dam caused various environmental problems along with the displacement of the Cheslatta T'En First Nation, whose traditional land was flooded. [3]

Contents

History

Selection of the dam site

Following the Second World War, the Canadian government invited the Aluminum Company of Canada (Alcan) to explore the potential of various sites around the country for hydroelectric power generation. [4] : 152  British Columbia was particularly interested in attracting the aluminum industry. Premier Byron Johnson introduced special legislation authorizing the provincial cabinet to do what it thought necessary to establish a new aluminum industry in BC. [5] : 137  For its part, Alcan was concerned with locating its energy-intensive aluminum smelters in close proximity to an inexpensive source of hydroelectric power. [5] : 137  Chilko Lake in the Chilcotin region was the original proposed site for the Kenney Dam, but due to preliminary calculations by Fisheries and Oceans Canada showing that the Chilko Lake held up to three-quarters of the Fraser River's total sockeye salmon spawned in the region, the provincial government eliminated the site from the proposal. [6] : 158  In 1948, following feasibility studies, Alcan decided to pursue a project on the Nechako River to power a large aluminum smelter to be located at the new townsite of Kitimat. [4] : 152  A public opinion poll taken in 1949 indicated that an overwhelming majority of British Columbians supported the Alcan's plans for hydroelectric development on the Nechako. [4] : 152  Support was not universal, however: for example, the International Pacific Salmon Fisheries Commission objected to the use of a salmon river for power. [2] : 69 

Alcan had originally proposed that the BC government build the dam and the company buy the electricity from the province, but the government declined. [2] : 76  Instead, Alcan signed the Kemano I agreement with the province on December 29, 1950 which granted the company rights to divert water from the Nechako above the dam and Nanika River downstream of Nanika Falls, permission to dam the Nechako and divert a portion of the original flow through a tunnel to a hydroelectric facility at Kemano, tax exemptions, and favourable water rental rates. [7] : 302  Alcan also received timber rights and mineral rights on the Crown land that was flooded, and was given the opportunity to purchase land for the townsite of Kitimat at a rate of $1.60 per acre. [2] : 74 

Construction and technical specifications

Construction of the dam and its associated facilities began in 1951 and continued until 1967, although the dam became operational in 1954. [4] : 152  The dam, located in the Canyon of the Nechako River, is a rock-filled, clay-core dam measuring 97 metres high and 457 metres wide (at the top). [4] : 152  Construction involved over 3 million cubic metres of material. [8] Concrete was injected in bedrock fissures below the dam to stabilize the foundation. [9] Until the W. A. C. Bennett Dam was built on the Peace River in the 1960s, the Kenney Dam was the largest rockfill dam in the world. [2] : 41  The dam was named for the Hon. Edward Tourtellotte Kenney, then-Minister of Lands and Forests in the government of Premier Byron Johnson. [10]

Behind the dam, the Nechako Reservoir filled from 1952 to 1957, flooding a series of lakes in the drainage basin of the upper Nechako River. [8] The water of the reservoir filled an area of 92,000 hectares. [11] However, the level of the reservoir can vary by more than 3 metres depending on rainfall and power generation needs. [2] : 41 

The dam, which sits at the east end of the reservoir, forms part of a hydroelectric complex which also includes the Skins Lake spillway, which regulates water levels both in the reservoir and downstream. On the west side of the reservoir, a 16-kilometre (9.9 mi) long intake tunnel running through the Coast Mountain range brings water to penstocks for a 2,600-foot (790 m) [12] vertical drop to the 8 units of the 890-MW Kemano Generating Station. [13] The basic design of the Kenney Dam-Kemano power station inspired a similar development in Quebec. The Bersimis-1 generating station, built between 1953 and 1956 by Hydro-Québec, shares many features with Alcan's project. [14]

Concurrent with the hydroelectric development of the Nechako, the Alcan smelter, and townsite of Kitimat were created.

Relocation of the Cheslatta T'En

Flooding of First Nations land

At the request of Fisheries and Oceans Canada (DFO) and Department of Indian Affairs (DIA), the Murray Dam and the Skins spillway were constructed across the Cheslatta River to help cool water temperatures in the upper Nechako River in order to minimize the impact on salmon spawning from the development of the Kenney Dam. [3] As a result of the discharged water from the Murray Dam and the spillway, the traditional lands which had been home to the Cheslatta T'En people for at least 10,000 years, were flooded and caused the relocation of approximately 200 Cheslatta people. [4] Villages were demolished and burned prior to the flooding with most families unable to return to collect their belongings and as water levels rose, it has been noted that coffins and skeletons from their traditional grave sites were washed away with skeletal remains being allegedly found in and around Cheslatta Lake. [4]

Relocation and compensation

The Cheslatta T'En people were given approximately 10 days notice before they were relocated to live in overcrowded tents at a temporary location 30 miles north of their reserves in Grassy Plains. [4] They were responsible for transporting their own belongings by means of wagons and consequently were forced to leave most of their traditional possessions behind. [4] After months of living in poor conditions at the temporary location sites, the Cheslatta people were eventually resettled on marginal farms scattered over large areas, which proved disconcerting for this once close-knit community. [4] According to DIA documents, the Cheslatta people asked for $108,000 in compensation along with payments for their new land, traplines and monthly pensions, however requests were denied and claims were dismissed. [15] : 48  Payments in the form of money were demanded for their new land and any constructional improvements within their community. [15] : 6  The Cheslatta people were compensated an average of $77/hectare with no payment covering moving expenses, compared to non-native individuals who received relocation compensation of $1,544/hectare along with covered moving expenses. [4] It was only a year after the Murray Dam was constructed that the band members received their compensation payments. [3]

The Cheslatta people were also regulated on where to hunt and when to fish which combined with the land payments forced many people to seek welfare benefits. [4] Their traditional practices became increasingly difficult as they were forced to conform to a new way of living and consequently death tolls rose from tuberculosis, suicide and alcoholism as a result of their poor living conditions. [4] Requests for assistance in health care, education and housing were denied until 1964 when the relocation sites were officially turned into federal reserves. [16] : 2 

DIA records show unanimous support by the Cheslatta people for the surrender of their territory, however many band members state that no formal assent was conducted and the signatures on documents are forged by Indian affairs officials. [4] It is also widely debated whether or not the legal rights of the Cheslatta people were presented as many claim that they were unaware of their power to refuse the requests of the Government of British Columbia, along with their ability to have a third-party advisor. [3] The Cheslatta people also claimed that Alcan had assured them most grave sites would be unaffected by rising water levels, however any grave sites running the risk of inundation would be transferred to higher grounds and the Cheslatta would be informed. [3] Alcan, however, claimed that the Cheslatta had agreed to flooding the grave sites, so long as two recent graves were moved and commemorative markers were placed above the flood waters. In accordance with this understanding, Alcan moved two graves while the rest of the grave markers were burned. [3]

Subsequent settlements

In 1990, the Cheslatta filed a $122 million court case against the Canadian government over DIA fraud, duress and breach of trust, however the case was settled out of court for slightly less than $7 million. [4] In 1998, Members of the Cheslatta Carrier Nation filed a Statement of Claim with the Supreme Court of British Columbia disputing all agreements and licenses issued to Alcan by the Federal and Provincial governments. The appeal was dismissed in Alcan's favour with no further legal actions in effect. [17]

On January 30, 2012, Rio Tinto Alcan finalized the transfer of approximately 11,000 acres of land to the Cheslatta Carrier Nation. The Cheslatta received the land as a form of freehold ownership with an estimated value of $1.2 million [18]

Environmental impacts

Construction of the dam involved flooding 32,000 acres of land in order to create the Nechako Reservoir. [2] : 38  This flooding impacted surrounding agricultural land and caused the loss of 8.7 million cubic meters of timber. [2] : 56  The reservoir also disrupted existing ecosystems, and impacted animals such as beavers, Canada geese, ducks, moose, and about 100 trumpeter swans, equivalent to one eighth of Canada's swan population. [2] : 51–52  The Nechako Reservoir took four years to fill, during these four year there was no flow running from the Nechako Reservoir for 50 miles between the dam and the Nautley River. [2] : 42  The fish left in this section of the river remained trapped and died. Local animals that relied on that section of the river were also forced to migrate. [2] : 42  In the first two years of operation, smelter emissions from the new Aluminum plant in Kitimat were believed to have caused further forest depletion, health problems for local workers, and harm on aquatic ecosystems. [19]

Impacts on fisheries

Although there was a general public acceptance of the proposed hydroelectric dam and smelter plant in the Fraser River region, the fisheries sector was outspoken about the dam's potential effects on salmon reproductive patterns. [6] : 157  Hydroelectric development in the region was seen in the media as being disruptive to important Fraser salmon spawning areas. [6] : 158  There were limitations to long-term streamflow and ecosystems data in the Fraser River and its tributaries, which has made specific impacts of river diversion hard to evaluate. [20]

The staff at the IPSFC and the DFO surveyed the Nechako River and discovered that the loss of salmon spawning grounds would not be the main threat to sockeye populations in dam construction. [6] : 163  Rather, it was the diversion of the river's natural flow that would cause the most impact to the sockeye population. [6] : 172  Research showed that because of the massive amount of water to be transmitted to the coast, there would be a loss of water during the spring and summer months, causing reduced flow. [6] : 172  Close to 100 percent of the river's estimated mean annual flow was diverted into the reservoir during the four-year period. [2] : 120  627 million cubic feet of water were withdrawn from the river daily. [2] : 120  Therefore, the Nechako riverbed would be affected, as well as causing a rise in water temperatures, which would make summer migration for salmon more difficult. [2] : 189  In the process of dam development, water temperatures exceeded 20 degrees Celsius, and the safest levels for sockeye salmon is 14 degrees Celsius. [21] Although the Nechako River temperatures became too high, the dam reservoir water temperatures were too low, and contained too high of levels of nitrogen and not enough oxygen for salmon. [2] : 179 

Due to these concerns, the DFO asked Alcan to assist the river's flow during the summer months. [6] : 173  Eventually both parties agreed to an extra spillway on Cheslatta Lake that would promote the natural flow of the river during these dry periods. [6] : 173  The Cheslatta, a tributary of the Nechako, would hold a spillway and reservoir to supply the water needed in sockeye migration during the summer months. [6] : 175  The river regained between 60 and 70 percent of flow, three years after the spillway was implemented. [20]

Economic impact

Energy export

Starting in the 1960s, Alcan was no longer producing energy solely for Kitimat's aluminum smelter. The company had begun selling the extra energy produced by the Kenney Dam to BC Hydro, a publicly owned company. By 1968, Alcan was producing enough energy to allow BC Hydro to delay their proposed $100 million project by 10 years. BC Hydro's proposed project would improve the power transmission system from Prince George and Smithers and it would extend the transmission system further to Terrace. [2] : 127  In 1978, when the project went forward, Alcan was able to run energy directly into the province's power grid. Because the BC Hydro grid is linked to the North American grid, Alcan began selling energy to Alberta and the United States. [2] : 128  In order to meet the energy demands in its new market, Alcan began diverting more water into its reservoir, resulting in lower water levels in the Nechako River. The decrease in water levels provided an increase the water temperatures. By 1980 water temperatures in the Nechako River had risen above what Fisheries and Oceans Canada (DFO) consider to be safe for migrating and spawning salmon. In response to the DFO studies, the federal government asked Alcan to increase water flow from the Nechako Reservoir into the river, but Alcan declined. This led to the "constitutional battle" over who controls the flow of water in the Nechako River. [2] : 130 

Kemano Completion Project

In the late 1970s Alcan announced the Kemano Completion Project. The project would construct a second tunnel from the Nechako Reservoir to Kemano, where four more power generators would be built. [5]

Controversies began in 1980, starting with the DFO and the federal government when they realized Alcan was going to go ahead with the Kemano Completion project without addressing the existing water level and temperature concerns. [5] : 139  The proposed Kemano Completion Project would result in an additional 12% reduction in the Nechako River water levels. [5] : 138  To avoid increased tensions Alcan accepted annual renewals of a court injunction setting water flows from 1980 until 1985, while the DFO performed studies on the potential effects on the Nechako's salmon population. In 1985, Alcan refused to consent to the renewal of the injunction, and DFO brought a claim against Alcan in the Supreme Court of British Columbia. [2] : 131  Both parties armed with their own scientists. [5] : 139  While the trial was briefly commenced in 1987, it was ultimately settled out of court through negotiations involving Alcan, the provincial government and the federal government, resulting in the 1987 settlement agreement. [7] : 303  Aspects of the agreement include: Alcan could build a cold water release valve in the Nechako Reservoir to cool the water temperature for migrating salmon and, in turn, release a smaller volume of water, [2] : 163  and the company gave up its water rights to the Nanika River. In addition, the federal and provincial governments agreed to allow Alcan to proceed with a modified version of its completion project. [7] : 303  Critics and opposition governments accused all three parties of not doing a proper environmental assessment. [7] : 304 

Alcan has not built the cold water release facility outlined in the 1987 settlement agreement, and as such has not reduced the amount of water released in to the Nechako water system. Studies showed that the water in the reservoir was too cold and contained too much nitrogen, while not enough oxygen. In order to create the correct balance, it was suggested that Alcan needed to draw water from both the centre and the surface of the reservoir, then run the water through "a hallow cone valve and over a baffle-clock spillway to reduce the amount of nitrogen". [2] : 179  Second delays in the construction were due to a decrease in the demand of aluminum and a decrease in the economy. [2] : 179 

In the early 1990s there were increased objections to the completion project, both from the public and the newly elected NDP provincial government, and in 1993 the BC Utilities Commission was directed to conduct public hearings. [7] : 304–5  The hearings began January 17, 1994. They looked at the design and construction of the plans for the facilities required for the completion project, hydrology impacts, fishery impacts, and the economic impacts for the people in the surrounding areas. [2] : 268  In 1995, due to the potential and unresolved impacts on the salmon fishery, BC Premier Mike Harcourt announced the cancellation of the Kemano Completion Project. [2] : 130  However, Alcan had already invested $1.3 billion in the Kemano Completion Project and in 1987 had been given permission to continue with the project. [7] : 302 

After two years of negotiations between Alcan and the BC government, the two parties signed the 1997 settlement agreement. Alcan committed to spending $50 million on a cold water release facility at Kenney Dam. [22] In addition, the government paid Alcan $500 million for what the company had previously invested in the project. [23]

See also

Related Research Articles

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<span class="mw-page-title-main">Dakelh</span>

The Dakelh or Carrier are the indigenous people of a large portion of the Central Interior of British Columbia, Canada.

<span class="mw-page-title-main">Kitimat</span> District municipality in British Columbia, Canada

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<span class="mw-page-title-main">Douglas Channel</span>

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<span class="mw-page-title-main">Gardner Canal</span>

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The Nechako Country, also referred to as the Nechako District or simply "the Nechako" is one of the historical geographic regions of the Canadian province of British Columbia, located southwest of the city of Prince George and south of Hwy 16 on the inland side of the Hazelton Mountains, and comprising the basin of the Nechako River and its tributaries. "Nechako" is an anglicization of netʃa koh, its name in the indigenous Carrier language which means "big river".

The Nechako Reservoir, sometimes called the Ootsa Lake Reservoir, is a hydroelectric reservoir in British Columbia, Canada that was formed by the Kenney Dam making a diversion of the Nechako River through a 16-km intake tunnel in the Kitimat Ranges of the Coast Mountains to the 890 MW Kemano Generating Station at sea level at Kemano to service the then-new Alcan aluminum smelter at Kitimat. When it was constructed on the Nechako River in 1952, it resulted in the relocation of over 75 families. It was one of the biggest reservoirs built in Canada until the completion of the Columbia Treaty Dams and the W.A.C. Bennett Dam that created Lake Williston. The water level may swing 10 feet between 2790 and 2800 feet.

<span class="mw-page-title-main">Kitimat River</span> River in British Columbia, Canada

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Knewstubb Lake is an arm or stretch of the Ootsa Lake Reservoir in the Nechako Country of the western Central Interior of British Columbia, Canada. It forms part of the south arm of the reservoir, which includes adjoining stretches such as Eutsuk Lake and Natalkuz Lake, which are "upstream" to the southwest. Ootsa Lake was formed by the damming and diversion of the flow of the Nechako River, the bulk of which is now drained beneath the spine of the Coast Mountains to the west to the Kemano Powerhouse, which is the power supply for the aluminum smelter at Kitimat, to the southeast of Terrace.

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The Cheslatta River is a tributary of the Nechako River, one of the main tributaries of the Fraser River, in the Canadian province of British Columbia. It flows through the Nechako Plateau. Before the construction of Kenney Dam in the early 1950s the Cheslatta was a minor tributary of the Nechako. Today the Nechako River is dry above the Cheslatta, which provides all its source water.

<span class="mw-page-title-main">Cheslatta Lake</span>

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References

  1. ↑ "Nechako Reservoir". BC Geographical Names .
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Christensen, Bev (1995), "Too Good to Be True: Alcan's Kemano Completion Project", Talon Books, Vancouver, BC
  3. 1 2 3 4 5 6 "Report of the Royal Commission on Aboriginal Peoples", RCAP, archived from the original on 25 November 2003, retrieved 30 March 2012
  4. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Windsor, J.E.; McVey, J.A. (2005). "Annihilation of Both Place and Sense of Place: The Experience of the Cheslatta T'En Canadian First Nation within the context of Large-Scale Environmental Projects". The Geographical Journal. 171 (2): 146–165. doi:10.1111/j.1475-4959.2005.00156.x.
  5. 1 2 3 4 5 6 Wellington, Alex; Greenbaum, Allan Jacob; Cragg, Wesley (1997). "Canadian Issues in Environmental Ethics". Peterborough: Broadview Press.{{cite journal}}: Cite journal requires |journal= (help)
  6. 1 2 3 4 5 6 7 8 9 Evenden, Matthew (2004). Fish Versus Power: An Environmental History of the Fraser River. New York: Cambridge University Press.
  7. 1 2 3 4 5 6 Harrison, Kathryn (1996). "Environmental Protection in British Columbia: Postmaterial Values, Organized Interests, and Party Politics". In Carty, R. Kenneth (ed.). Politics, Policy, and Government in British Columbia. Vancouver: UBC Press.
  8. 1 2 Nechako Canyon Protected Area BC Parks. Accessed 9 March 2012.
  9. ↑ Reservoir and Dam Royal BC Museum . Accessed: 16 February 2012.
  10. ↑ "Mount Kenney". BC Geographical Names .
  11. ↑ Reservoir and Dam Royal BC Museum'. Accessed: 16 February 2012.
  12. ↑ The tunnel Royal BC Museum . Accessed: 16 February 2012.
  13. ↑ Rio Tinto Alcan. "Power Operations/Watershed Management". Rio Tinto Alcan Primary Metal BC Operations.{{cite web}}: Missing or empty |url= (help)
  14. ↑ McNaughton, W.J.W. (April 1960). "Bersimis: The Development of a River". Canadian Geographical Journal. Ottawa: Royal Canadian Geographical Society. 60 (4): 127.
  15. 1 2 Byl, Dick (1992). The Cheslatta Surrender. A Legal Analysis of a Surrender Given by the Cheslatta Carrier Nation to Her Majesty in Right of the Government of Canada on the 21st of April 1952.
  16. ↑ Wagg, Dana (1993). The Cheslatta Story: In Brief.
  17. ↑ "Cheslatta Carrier Nation v. British Columbia" (PDF). British Columbia Court of Appeal. Retrieved 31 March 2012.
  18. ↑ Billard, Rebecca. "Rio Tinto Alcan returns Cheslatta Carrier Nation's traditional territory". BCLocalNews. Retrieved 31 March 2012.
  19. ↑ Environment Canada. Threats to Water Availability in Canada, (Ottawa: Minister of Public Works and Government Canada, 2004), 4.
  20. 1 2 Environment Canada, 4.
  21. ↑ International Pacific Salmon Fisheries Commission. Potential Effects of the Kemano Completion Project on Fraser River Sockeye and Pink Salmon. (New Westminster), 3.
  22. ↑ Bruce Sheedy, Analysis of a Cold Water Release Facility in the Nechako Reservoir. (Burnaby, BC: Simon Fraser University Library, 2005), 1.
  23. ↑ Rio Tinto Alcan. "History in BC. - Background". Rio Tinto Alcan Primary Metal BC Operations.{{cite web}}: Missing or empty |url= (help)
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