Mean daily water temperatures in the Nechako River above the Stuart River confluence did not exceed 20 C between July 20 and Aug. 20, 2017. Nechako Fisheries Conservation Program photo

Mean daily water temperatures in the Nechako River above the Stuart River confluence did not exceed 20 C between July 20 and Aug. 20, 2017. Nechako Fisheries Conservation Program photo

Manipulating water temperatures in the Nechako River

The objective is to protect migrating sockeye salmon

An annual Rio Tinto project to moderate elevated water temperatures in the Nechako River during sockeye salmon migration saw positive results in 2017.

Mean daily water temperatures in the Nechako River above the Stuart River confluence did not exceed 20 C between July 20 and Aug. 20, 2017.

Kevin Dobbin, a spokesperson for Rio Tinto BC Works, says the ultimate goal of the project is to minimize the frequency of occurrences of water temperatures in excess of 20 C (between July 20 and Aug. 20) as this might impact sockeye salmon.

This is achieved by manipulating the timing and volume of reservoir water discharged, through Skins Lake Spillway releases, into the Nechako River.

“It serves to protect the sockeye salmon while they migrate through the Nechako River to spawning grounds upstream,” he explained.

The respective maximum and minimum mean daily water temperatures recorded during the 2017 control period were 19.5 C on Aug. 9 and 16.7 C on Aug. 17.

Dobbin said Rio Tinto BC Works considers this project to be an integral part of their operations in British Columbia.

The project is implemented by an independent third-party consultant, who in turn directs Rio Tinto to make the appropriate changes in spillway discharge to meet the objective. Annual data is collected, analyzed, and then reported and published as the Nechako Fisheries Conservation Program report.

The Nechako River is jointly monitored by Rio Tinto, Fisheries and Oceans Canada and the B.C. Ministry of Environment. The Nechako Fisheries Conservation Program was formed to ensure the effective implementation of a 1987 settlement agreement between the three parties. The agreement defined a program of measures intended to conserve Nechako River chinook and protect migrating sockeye populations.

Reports relating to project, and a historical summary report of data from 1987-2016, are available at http://www.nfcp.org.


 

@flavio_nienow
newsroom@ldnews.net

Like us on Facebook and follow us on Twitter.

Nechako Watershed

Just Posted

FILE – Perry Bellegarde, National Chief of the Assembly of First Nations, takes part in an event on Parliament Hill in Ottawa on Tuesday, July 7, 2020. THE CANADIAN PRESS/Sean Kilpatrick
Indigenous Peoples Day must be a ‘call to action’, says Assembly of First Nations chief

Discovery of children at Kamloops residential school site must lead to change, Perry Bellegarde says

The Binche Fishing Derby at Stuart Lake is fast approaching. (Binche Fishing Derby Facebook photo)
Binche shares excitement for upcoming fishing derby

“It’s more than just fishing,” says Dave Birdi

A person receives a COVID-19 vaccine at a vaccination clinic run by Vancouver Coastal Health, in Richmond, B.C., Saturday, April 10, 2021. (THE CANADIAN PRESS/Jonathan Hayward)
Local youth vaccination clinics underway

Pfizer vaccine will be used

Priya Sharma. (Submitted)
Column: Why ultimatums don’t work

By Priya Sharma It is a common misconception that people can choose… Continue reading

Marco Mendicino, Minister of Immigration, Refugees and Citizenship during a press conference in Ottawa on Thursday, May 13, 2021. THE CANADIAN PRESS/Sean Kilpatrick
Canada to welcome 45,000 refugees this year, says immigration minister

Canada plans to increase persons admitted from 23,500 to 45,000 and expedite permanent residency applications

The Sacred Hearts church on PIB land burned Monday morning. (Theresa May Jack/Facebook)
Two churches on First Nation land in South Okanagan burn to the ground

Sacred Hearts church on Penticton Indian Band land was reduced to rubble

Tl’etinqox-lead ceremony at the site of the former St. Joseph’s Mission in Williams Lake, B.C., June 18, 2021. (Angie Mindus photo - Williams Lake Tribune)
‘We are all one people’: Honouring residential school victims and survivors

Love, support and curiousity: Canadians urged to learn about residential schools and their impact

Indigenous rights and climate activists gathered outside Liberty Mutual’s office in Vancouver to pressure the insurance giant to stop covering Trans Mountain. (Photo by Andrew Larigakis)
Activists work to ensure Trans Mountain won’t get insurance

Global campaign urging insurance providers to stay away from Canadian pipeline project

In the first election with public money replacing corporate or union donations, B.C. Liberal leader Andrew Wilkinson, B.C. Greens leader Sonia Furstenau and B.C. NDP leader John Horgan take part in election debate at the University of B.C., Oct. 13, 2020. (THE CANADIAN PRESS)
B.C. MLAs ponder 2022 ‘sunset’ of subsidy for political parties

NDP, B.C. Fed call for increase, B.C. Liberals have no comment

Investigators use a bucket to help recover human remains at a home burned in the Camp fire, Thursday, Nov. 15, 2018, in Magalia, Calif. Many of the missing in the deadly Northern California wildfire are elderly residents in Magalia, a forested town of about 11,000 north of the destroyed town of Paradise. (AP Photo/John Locher)
‘Forever War’ with fire has California battling forests instead

Five of the state’s largest-ever blazes seared California last year, as authorities tackle prevention

Tokyo 2020 President Seiko Hashimoto and IOC President Thomas Bach, on a screen, speak during a five=party online meeting at Harumi Island Triton Square Tower Y in Tokyo Monday, June 21, 2021. The Tokyo Olympics will allow some local fans to attend when the games open in just over a month, Tokyo organizing committee officials and the IOC said on Monday. (Rodrigo Reyes Marin/Pool Photo via AP)
Tokyo Olympics to allow Japanese fans only, with strict limits

Organizers set a limit of 50% capacity — up to a maximum of 10,000 fans

The border crossing into the United States is seen during the COVID-19 pandemic in Lacolle, Que. on February 12, 2021. THE CANADIAN PRESS/Paul Chiasson
VIDEO: Border quarantine to soon lift for fully vaccinated Canadians

Eligible travellers must still take multiple COVID-19 tests

Most Read