Categories
Monitoring

Mount Polley Environmental Monitoring

Environmental monitoring programs and closure research projects at Mount Polley mine site continue as planned. Remediation construction at the lower Hazeltine Creek and Edney Creek began this summer. Mount Polley staff, with assistance from Golder Associates Ltd., have begun development of the 2022 Water Management Plan.

Monitoring activities include regular water quality and toxicity sampling at:

  • water treatment plant (WTP) 
  • surface waters of Polley Lake, Bootjack Lake, Hazeltine Creek, Edney Creek & Quesnel Lake
  • mine contact waters including groundwater & mine seepage with flow rates

Regular inspections of all critical ditches, sumps, ponds, pumping systems and pipelines.

Ongoing surveys and studies include:

  • spawning activity in Hazeltine & Edney Creeks
  • remediated terrestrial habitats; vegetation growth, nesting sites and wildlife usage
  • aquatic habitats; fish population & tissue, zooplankton, phytoplankton, benthic invertebrates and sediments in Bootjack, Polley & Quesnel Lakes
  • dilution modelling of the Quesnel Lake discharge
  • semi-passive and passive water treatment options for closure which include a constructed wetland treatment system pilot study and a saturated rock fill bench scale test
Tour of aquatic habitat construction in lower Hazeltine Creek
Tour of aquatic habitat construction in lower Hazeltine Creek
Hazeltine Creek Reach One revegetated riparian area
Categories
Remediation

Major milestones of Mount Polley’s environmental remediation efforts to date

The remediation effort at Mount Polley is ongoing; however, we are very proud of the major milestones that have been completed to-date.

  1. Repair of lower Edney Creek, re-establishment of link to Quesnel Lake and installation of new fish habitat for spawners from Quesnel Lake, completed in spring 2015, with evidence of successful spawning by Interior Coho, Kokanee and Sockeye Salmon.
  2. Completion of construction of a new Hazeltine Creek channel in May 2015, to control erosion and provide base for remediation of the creek itself and the creek valley.
  3. Ongoing planting of native trees and shrubs in the riparian and upland areas along the creek, now totally more than 600,000 trees and shrubs planted.
  4. Installation of over 6 kilometres of new fish spawning and rearing habitat in upper to middle Hazeltine Creek. Evidence of successful 2018 and 2019 Rainbow trout spawning in upper Hazeltine Creek.
  5. Clean-up and repair of 400 metres of Quesnel Lake shoreline, including placement of new fish spawning gravels.
  6. Re-establishment of wetlands in the Polley Flats area adjacent to the repaired TSF.
Hazeltine Creek aerial view
Hazeltine Creek recovery work. An aerial view of the environmental remediation efforts captured by a drone.
Categories
Video

Mount Polley Remediation Story

This is the story of Mount Polley Remedition – from tailings spill to environmental recovery

Katie: “My name is Katie McMahen. I was born and raised here in Williams Lake and I was a member of the environmental team here at Mount Polley for a number of years. Although it was a really devastating event, as scientists we want to learn what we can out of this work that’s going on and so we’re studying methods for restoring functioning forest ecosystems, methods for rehabilitating the soil, and trying to improve best practices, really. Since day one, we’ve been doing a ton of environmental monitoring and really prioritizing fixing up the creek.

“So I love the forest, and I love working and rehabilitating the forest, so some of the coolest work we’ve been doing is not just the replanting of trees, but trying to trying to create the right conditions for those trees to thrive. So, managing the tailings, doing some techniques to really make nice little sites for the trees to grow and so that they had the proper soil conditions.”

Mount Polley remediation staff on site near Hazeltine Creek
Mount Polley staff have been working diligently for years to restore habitats, ecosystems, and the environment at Mount Polley and affected sites. The Mount Polley Remediation story is one of turn-around, innovation, and Canadian pride.

Gabriel: “My name is Gabriel Holmes, and I grew up in Likely, British Columbia, and I’m an environmental technician here, I’ve worked here since 2011. I’m really proud of reintroducing the fish into the creeks – there’s a whole bunch of things I could go on and on – but reintroducing fish into Hazeltine Creek was a real milestone, the success of the spawning last year of the rainbow trout and Hazeltine Creek, a real milestone. The vegetative communities that are developing in our terrestrial landscapes in riparian areas and then of course this year, seeing a number of sockeye salmon in Edney Creek. I’m really proud to see that occur because that’s one of our end goals that we were trying to accomplish and to see them utilizing the system today, it’s fantastic.”

Katie: “I’m super proud of the work that we’ve done here. One of the biggest challenges has just been the scale of the work that we’ve had to do, and so considering it’s only five years now since the breach, just the sheer amount of work that’s been done in those five years is amazing. When I look back it feels like way longer because I can’t believe how much we’ve done.

“We’ve really set a high precedent for what needs to happen following an incident like this and that the type of work that can be done and should be done to clean up sites. There’s a lot of information that needs to get out there about what what’s the actual environmental conditions and the fact that we have thriving rainbow trout in the creek and tons of wildlife and animals using the habitat that we’ve created. It’s going to take some years for everything to grow, but these ecosystems are well on their way to recovery.”

Mount Polley environmental technician surveys sites near Polley lake. Remediation efforts have come a long way and are almost complete. The recovery project has cost Mount Polley’s parent company more than $70 million.