I never heard any mention of this before.https://www.cbc.ca/news/canada/north/victoria-gold-mine-experts-1.7264503
Tests run on rainbow trout
The latest news release from Victoria Gold states most infrastructure on-site wasn't impacted, including the containment ponds and the water treatment plant.
Cyanide has already been detected in Haggart Creek. Earlier this month, Streicker said the concentration in the water was 0.04 milligrams per litre. Tyler Williams, a water resources scientist with the territorial government, said water collected on June 25 and 26 from Dublin Gulch and Haggart Creek, respectively, was used to run tests on juvenile rainbow trout, which were observed for four days to see if they died or experienced some change in behaviour.
"[The tests] showed no effects to fish and no fish mortalities," he said.
British Columbia water quality guidelines state 0.01 mg/L can cause adverse impacts to fish, but that variables, including species and lifestage, can affect to what degree. The report states cyanide levels greater than 0.2 mg/L "are rapidly fatal to most fish species," with salmonids — the family of fish including salmon, trout and whitefish — being most sensitive to the effects of cyanide.