Chum salmon swim beneath the surface of Salmon Creek on Aug. 3, 2015. (Michael Penn, Juneau Empire File)

Chum salmon swim beneath the surface of Salmon Creek on Aug. 3, 2015. (Michael Penn, Juneau Empire File)

Major rock slide in B.C. river raises concerns about salmon spawning

The Department of Fisheries and Oceans Canada is looking at several options to address the problem

A significant rock slide in B.C.’s Fraser River appears to be blocking salmon from migrating upstream to spawning grounds, raising concerns about impacts to species that are already in peril.

The federal and B.C. governments say they’re working together to assess the impacts and come up with responses to the slide that happened around June 21 or 22 in a remote area near Big Bar, just west of Clinton.

READ MORE: Rock slide in B.C. river may hinder salmon passage

The obstruction has created a five-metre waterfall. A Fisheries and Oceans Canada representative said Friday the department has installed acoustic monitoring equipment to determine if fish are able to pass up through the slide to the upper part of the river.

“Our initial assessment is that chinook salmon are holding below the rock slide and they’re having difficulty getting up past the falls,” said Bonnie Antcliffe, associate regional director general, on a conference call with reporters.

“However, until we have more information from the acoustic monitoring equipment, it’s really difficult to confirm the extent of fish passage. Some fish may be getting up.”

She said the department is planning to install a second acoustic monitoring device below the slide.

The department is looking at several options to address the problem, including monitoring the site to determine if fish are able to pass through the area when the water level drops naturally in the coming weeks, she said.

It’s also considering reducing the velocity of water or the height of the falls, or providing passage for fish through engineering and rock work.

Another option would be moving the fish by truck from below the slide to above it, but that would be difficult because it is a remote area with little road access, she said.

“This is an extremely important situation and it’s also very dynamic and it’s very complex,” Antcliffe said. “At this point, we’re doing everything we can to ensure we address the issue quickly but also in an appropriate manner to ensure a successful outcome for fish.”

Jennifer Davis, with the provincial Forests Ministry, said the natural turbidity of the Fraser River has made it challenging to determine how many fish are passing through. The area is also very remote, with steep canyon slopes and limited access for helicopters, she said.

Scientists on site are working hard to determine the magnitude of the problem and what responses can happen, Davis added, and they’re also co-ordinating with First Nations and communities.

“There’s a whole variety of things that can be looked at, but it’s a bit premature to jump into which action it would be.”

There are a number of stocks, including chinook, steelhead, coho and sockeye that would migrate above the barrier for spawning, and Fisheries and Oceans already has concerns about some of those species and has implemented conservation measures to protect them, said the department’s Andrew Thomson.

“That’s what’s really at risk here, is further impairment of the stocks that are already in a critical zone,” he said.

While there’s no concrete figure on how many salmon are currently impacted, Thomson said typically at this time the run that would be most prominent would be chinook, and it’s believed to be the early part of their migratory window.

But later in summer, Thomson said scientists would expect to see a very large number of chilko sockeye moving through the area — potentially upward of a million fish.

“Depending on the stock numbers, there could be quite a number of fish that would be below this barrier.”

Laura Kane, The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Brigitte Gietema was one of more than 100 athletes who participated in the Move4Communitas fitness fundraiser for mental health. (Photo: Brigitte Gietema)
Virtual walk raises more than $13K for Communitas in Abbotsford

Move4Communitas was held over eight weeks, involving 100 participants

The Seattle Cossacks are a popular portion of the Hope Brigade Days parade. Some form of a community parade may still take place, say organizers. (Standard file photo)
Hope’s Brigade Days once again hit by pandemic concerns

Main event cancelled, but there is a glimmer of hope some events could happen

(Submitted)
Looking back on a rural nursing career in Hope

After a career spent working at Fraser Canyon Hospital, Jo-Dee Chisholm retires

B.C. Wildfire Services shows a fire on Chehalis Forest Service Road as of Sunday, May 16, 2021. (BC Fire Services)
UPDATE: Fire near Harrison Mills grows to 3 hectares

Resident near wildfire: ‘I pray that the Creator brings rain as soon as possible’

Justin Bond’s Bahrain 1 took a team around a year to construct. It gets its name because the Sheik of Bahrain is a major sponsor of the team. / Photo courtesy of Justin Bond.
Mission dragracer wins Atlanta race, ousts back-to-back world champion

Justin Bond goes quarter-mile in 5.738-seconds, beating champ Stevie ‘Fast’ Jackson on home turf

Daily confirmed COVID-19 cases reported to B.C. public health, seven-day rolling average in white, to May 12, 2021. (B.C. Centre for Disease Control)
B.C. preparing ‘Restart 2.0’ from COVID-19 as June approaches

Daily infections fall below 500 Friday, down to 387 in hospital

A vial of AstraZeneca vaccine is seen at a mass COVID-19 vaccination clinic in Calgary, Alta., Thursday, April 22, 2021. Dr. Ben Chan remembers hearing the preliminary reports back in March of blood clots appearing in a handful of European recipients of the Oxford-AstraZeneca COVID-19 vaccine. THE CANADIAN PRESS/Jeff McIntosh
Science on COVID, VITT constantly changing: A look at how doctors keep up

While VITT can represent challenges as a novel disorder, blood clots themselves are not new

Police tape is shown in Toronto Tuesday, May 2, 2017. Statistics Canada says the country's crime rate ticked up again in 2018, for a fourth year in a row, though it was still lower than it was a decade ago. THE CANADIAN PRESS/Graeme Roy
CRIME STOPPERS: ‘Most wanted’ for the week of May 16

Crime Stoppers’ weekly list based on information provided by police investigators

Poached trees that were taken recently on Vancouver Island in the Mount Prevost area near Cowichan, B.C. are shown on Sunday, May 10, 2021. Big trees, small trees, dead trees, softwoods and hardwoods have all become valuable targets of tree poachers in British Columbia as timber prices hit record levels. THE CANADIAN PRESS/Jen Osborne.
Tree poaching from public forests increasing in B.C. as lumber hits record prices

Prices for B.C. softwood lumber reached $1,600 for 1,000 board feet compared with about $300 a year ago

The warm weather means time for a camping trip, or at least an excursion into nature. How much do you know about camps and camping-related facts? (John Arendt - Summerland Review)
QUIZ: Are you ready to go camping?

How many camp and camping-related questions can you answer?

The Independent Investigations Office of BC (IIO) (File Photo)
Police watchdog investigating after man found dead in Surrey following a wellness check

IIO says officers ‘reportedly spoke to a man at the home before departing’

On Friday, May 14 at Meadow Gardens Golf Club in Pitt Meadows, Michael Caan joined a very elite club of golfers who have shot under 60 (Instagram)
Crowds at English Bay were blasted with a large beam of light from an RCMP Air-1 helicopter on Friday, May 14. THE CANADIAN PRESS/Marc Grandmaison
Police enlist RCMP helicopter to disperse thousands crowded on Vancouver beach

On Friday night, police were witness to ‘several thousand people staying well into the evening’

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

Most Read