B.C.’s Chilcotin River is flowing once again after breaching a kilometre-long landslide that had barricaded it for five days, unleashing a surge of water laden with silt and timber that poses an uncertain new threat to beleaguered salmon runs currently sniffing out their spawning grounds. Officials have yet to determine any effects on salmon runs, but are prepared to intervene as soon as the river is safe. The emptying of the temporary 11-kilometre lake that formed behind the landslide dam was slower than worst-case scenario modelling, averting the need for mass evacuations downriver. …Dr. Scott Hinch, associate dean at the University of British Columbia’s Pacific Salmon Ecology and Conservation Laboratory is optimistic, saying the Chilko sockeye have the best swimming ability of any of the Fraser sockeye and has a broad thermal tolerance. Studies have found they also have more efficient hearts than other salmon populations. [A Globe and Mail subscription is required for full access]