Finding the best way to release salmon trapped by a landslide in the Fraser River near Big Bar is under careful consideration by experts.
Fisheries and Oceans Canada and B.C. government officials announced Friday at a technical briefing that they are to address impacts of the June 23 slide at a remote and unstable part of the Fraser River.
An B次元官网网址渋ncident command postB次元官网网址� was set up at Lillooet with several agencies working in tandem to find the best remediation options.
Options and remediation now being considered:
B次元官网网址� Take no action and continue to monitor fish passage;
B次元官网网址� Explore options to remove rock obstruction; or
B次元官网网址� Physically move the trapped fish upstream.
B次元官网网址淓ach of these options come with potential benefits and some risk or possible risk of consequence. For this reason, we continue to thoroughly assess each option,B次元官网网址� according to the update July 7.
What they believe happened was that a massive slab of rock sheared off and slid into a steep and narrow section of the river, creating a five-metre waterfall and a barrier to fish passage.
Several types of fish are being impacted based on the B次元官网网址渕agnitudeB次元官网网址� of the obstruction, including some of conservation concern, officials said. The fish stocks include: Interior Fraser Steelhead (Chilcotin), Spring/Summer Chinook, Interior Fraser Coho, Early Stuart Sockeye, Early Summer Sockeye, Summer Run Sockeye and Fraser Pinks.
We are aware of a significant rock slide on the near Big Bar BC which may impact the passage of returning . We have surveyed the site by air and our engineers and habitat specialists will be in the area today to determine the extent of the blockage.
B次元官网网址� DFO Pacific (@DFO_Pacific)
Dean Werk, president of the Fraser Valley Salmon Society, said he appreciates the unified approach to the problem that officials are taking by working together, but B次元官网网址渄ecisive actionB次元官网网址� needs to be taken quickly to help the fish.
B次元官网网址淭his truly should be considered a state of emergency for this historic wild salmon and sturgeon river,B次元官网网址� Werk said. B次元官网网址淭he early wild salmon population is predicted to have a dire run this season and every salmon needs to reach its natal stream in the first part of the migration.B次元官网网址�
The swift-moving water is impeding salmon and other fish from migrating upriver to reach spawning grounds, but they also created hazardous conditions for responding agencies at the site, which is not accessible by road. Field staff were forced to conduct an assessment of the site from the safety of a helicopter over the weekend. They used water dropped from a helicopter bucket to sluice away some of the sediment at the site.
If the decision is made to capture and move the fish away from the blockage, several capture methods could be used. The use of nets and weirs was discussed at the joint briefing on Friday, as well as beach seining. The fish could be transported on a flat-bed truck, to be re-introduced to the watercourse, or transported by other means such as a helicopter.
The Fraser Valley Salmon Society has been at the forefront of conservation of wild salmon and sturgeon for more than 34 years, Werk said.
B次元官网网址淥ur members and the world are very concerned about what has happened,B次元官网网址� he said.
The hope is that as many fish as possible can be released from the obstruction.
B次元官网网址淭he least impact on wild salmon the better, but if there is a loss of a small amount due to clearing the slide, then we may need to sacrifice these fish, to have the largest portion of the runs of sockeye and chinook reach the spawning areas safely,B次元官网网址� Werk said.
There is a chance of about 7.9 million mid-summer sockeye due to return, he estimated, judging from the outgoing fry potential from four years prior.
B次元官网网址淲e are hopeful this will be resolved so that all user groups can have opportunities for the future,B次元官网网址� Werk added.
Some fish are getting through, like the larger chinook, but itB次元官网网址檚 a relatively small number in the context of the total number of fish trying to pass.
B次元官网网址淲hat has happened up near Big Bar obviously is of great concern to all of us, to all British Columbians,B次元官网网址� said Federal Fisheries Minister Jonathan Wilkinson, at a separate salmon restoration funding announcement on Friday alongside provincial officials.
B次元官网网址淲e are working on it expeditiously because of the fish there waiting to pass,B次元官网网址� Wilkinson said.
The minister acknowledged the barrier is a threat for First Nations who rely on the salmon for their food and ceremonial purposes but itB次元官网网址檚 also a threat for the commercial and recreational fisheries.
B次元官网网址淭he Fraser as you know is the most important salmon-bearing river in B.C.B次元官网网址�
He said they were looking at B次元官网网址渁ll optionsB次元官网网址� to dislodge the obstruction.
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