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Remediation

Over 100 sockeye salmon adults return to spawn in Hazeltine Creek

After seven years of remediation work in Hazeltine Creek in response to the 2014 tailings dam breach, the salmon have returned to the creek to spawn.  In stream work was completed in late August this year, just in time for the sockeye migration in the region.

In the early stages of the Mount Polley remediation effort, 40 thousand truckloads of rock were used to build a foundation channel along Hazeltine Creek from Polley Lake to Quesnel Lake. Next, section by section, the remediation team modified the initial channel and added sinuosity and habitat features to provide instream cover for fish, enhancing the habitat value. These features included spawning platforms, pools, riffles, rock boulder clusters, root wads, and logs.

The biological design for habitat features was developed collaboratively with Mount Polley’s technical experts, Williams Lake First Nation, Xatśūll First Nation, and at the regulatory level, with the Department of Fisheries and Oceans and the Ministry of Forests, Lands and Natural Resource Operations.  Collectively the group is referred to as the “Habitat Remediation Working Group.”

Over the past few weeks over 100 sockeye salmon adults have returned to Hazeltine Creek to spawn. “The focus of the Hazeltine Creek remediation effort at Mount Polley has been to repair and rehabilitate Hazeltine Creek so that it becomes a self-sustaining, productive fish habitat.” said Brian Kynoch, President of Imperial Metals. 

Trout have been using portions of the rehabilitated creek to spawn since 2017, and now another major milestone has been achieved with the return of sockeye salmon to the creek. The presence of the sockeye salmon and various other fish species signals that the remedial work has begun to restore ecological function.  This is not only evident in the aquatic environment but also evident across the terrestrial landscape where plant communities are developing, and abundant wildlife is observed.  It is expected that as both the aquatic and the terrestrial ecosystems mature, further ecological function will emerge, and the site will host an even broader array of organisms.

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
Remediation

The Mount Polley Team: Maintaining a Healthy Environment

Mout Polley continues to restore the environment during its current care and maintenance phase.

With 14 staff members working at the Mount Polley site, as well as several contractors, the remediation team at Mount Polley continues to work diligently to restore habitats, ecosystem and the environment at Mount Polley and affected sites.

The Mount Polley team includes environmental staff ensuring environmental recovery.  DWB Consulting Services Ltd. is also on site to provide quality control and assurance.

Some monitoring activities taking place during Mount Polley’s continued remediation include water sampling, water treatment plant sampling, plankton sampling, fish population monitoring, Hazeltine Creek monitoring and fish surveys.

Sockeye salmon in Edney Creek as a result of Mount Polley remediation
Salmon and trout are repopulating Edney Creek during Mount Polley remediation efforts.

Our efforts have proved successful to-date! Several sockeye salmon were observed in Edney Creek. Furthermore, Rainbow Trout, Coho Salmon, Lon Nose Dace and Burbot have also been identified.