A BREACH OF HUMAN RIGHTS
THE HUMAN RIGHTS IMPACTS OF THE MOUNT POLLEY MINING DISASTER, BRITISH COLUMBIA, CANADA
Amnesty International
particularly copper which interferes with salmon olfactory systems which they need for migration to their
spawning grounds. At the time of the breach, Quesnel sockeye salmon were returning up the Fraser River
and young salmon born during the 2013 spawning cycle were rearing in the lake.
The breach deposited tailings waste containing nickel, arsenic, selenium, copper, aluminium and lead into
Quesnel Lake.
Homeowners along the lake reported a dramatic increase in turbidity (meaning that water
appeared cloudy because of the number of large particles suspended in the liquid) and the appearance of a
green plume. Turbidity is an indicator of water quality: the more turbidity, the greater the concern that large
particles can harbour micro-organisms and heavy metal toxins.
Trees along the breach site were coated in
tailings. MPMC’s post-breach environmental impact assessment reported that most of the trees in the “halo”
zone died as a result of suffocation from the deposited tailings sediment.
The region’s local authority, the Cariboo Regional District (CRD) declared a State of Local Emergency; and
drinking, bathing, fishing and swimming in the lake were immediately banned by the province’s Interior
Health Authority. Community showers were temporarily set up for residents and the Red Cross, local
businesses and MPMC provided them with drinking water.
BC’s Premier Christy Clark said she was committed to
returning Quesnel Lake, one of the “most pristine, cleanest
lakes in the world”, to its pre-breach state. She said those
responsible would be held accountable and that taxpayers
would not be on the hook for the clean-up costs.
By the end of August the provincial Ministry of Environment
(MOE) reported that water in Quesnel Lake met all drinking
water and aquatic life guidelines.
However, the extent of the
pollution and long-term health impacts of the disaster remain unclear, prompting University of Northern
British Columbia researchers to note that, “the nature of waste materials now present in Quesnel Lake
presents a potential hazard to the metal content of aquatic food webs and the growth, survival and behaviour
of important fish species”.
The CRD called on the provincial government to conduct a socio-economic impacts study in order to fully
assess the impacts of the spill on people and economies within the Cariboo. The Province and MPMC
agreed to conduct a study and to release it at the end of February 2017 but, to date, the report has not been
made publicly available.
Petticrew, E.L , et al (2015), The impact of a catastrophic mine tailings impoundment spill into one of North America’s largest fjord lakes: Quesnel Lake,
British Columbia, Canada, Geophys.Res.Lett., 42, 3347-3355, dol:10.1002/2015GL063345, pg 1.
There is no agreement about how to safely remove tailings from the lake, but residents are concerned about the toxicity of the tailings sediments and their
long-term impact on Quesnel Lake. Mine tailings are a concentration of toxic substances. According to company records filed with Canada’s MOE, in 2012 the
Mount Polley tailings pond contained, “326 tonnes of nickel, over 400 tonnes of arsenic, 177 tonnes of lead and 18,400 tonnes of copper and its compounds”.
Guidelines for Canadian Drinking Water Quality – Summary Table, February 2017, http://www.hc-sc.gc.ca/ewh-seMount/pubs/water-eau/sum_guide-
res_recom/index-eng.php.
The ‘halo’ zone refers to the area along the forest floor where tailings were deposited: “Later studies conducted as part of the risk assessment problem
formulation found that there were physical impacts to the terrestrial ecosystem where the tailings deposited on the existing forest floor (referred to as the
‘halo’) blocked air exchange and led to the loss of standing trees in the ‘halo’ area along Hazeltine Creek”. Post-Event Environmental Impact Assessment
Report, Golder and Associates, June 3, 2016, pg.4.
Post-Event Environmental Impact Assessment Report, Golder and Associates, June 3, 2016. P.4 and as reported in the media: Michael Mui, Vancouver 24
Hours, http://vancouver.24hrs.ca/2016/06/22/majority-of-trees-dead-near-Mount-polley-spill, June 22, 2016, Accessed April 6, 2017.
http://globalnews.ca/video/1498093/raw-christy-clark-speaks-about-mount-polley-mine-disaster Accessed March 2017.
MOE, 2014. Information Bulletin: Latest Mount Polley water-quality results.2014ENV0073-001248 August 25, 2014, available at
http://www.env.gov.bc.ca/epd/mount-polley/pdf/20140825/IB_Aug13-water-quality-results-Aug25.pdf. However, an MOE Bulletin noted that samples
collected from the Quesnel River showed ongoing problems with turbidity levels above the B.C. drinking water guidelines and total aluminum above Health
Canada drinking water guidelines, and exceedances for total suspended solids, total iron and total phosphorus.
Fisheries and Oceans Canada, 2014. Advisory FN0753 Recreational, August 5, 2014; FOC later re-opened the chinook fishery on August 13 and the Sockeye
fishery on August 19.
Petticrew, E.L., et al (2015), The impact of a catastrophic mine tailings impoundment spill into one of North America’s largest fjord lakes: Quesnel Lake ,
British Columbia, Canada, Geophys.Res.Lett., 42, 3347-3355, dol:10.1002/2015GL063345, pg 9
“People were confused, hurt and angry.
They were traumatized. People stopped
trusting the authorities.”
– Al Richmond, Chair, Cariboo Regional
District.