Deroche Creek Realignment and Sediment Removal

The British Columbia Ministry of Environment and Climate Change Strategy proposes to address sediment accumulation and erosion concerns in the lower kilometer of Deroche Creek upstream of Nicomen Slough to mitigate the risk of flooding and damage to infrastructure in the adjacent Leq'a:mel First Nation and Deroche communities. Proposed works include removal of riparian vegetation, construction of a sediment basin and low flow channel, installation of bed armouring at Taylor Road bridge, and construction of two timber deflectors on the Deroche Creek alluvial fan.

Fish habitat offsetting measures are proposed, including construction of four rearing habitat channels within the northeast and southeast portions of the Deroche Creek alluvial fan, installation of a large woody debris reef along the Highway 7 embankment, installation of habitat complexing features in the sediment basin low flow channel, and enhancement of existing riparian habitat along Deroche Creek through invasive species removal and planting of native trees and shrubs.

Emergency sediment removal was conducted in November 2022 to remove sediments introduced by the 2021 Atmospheric River Event. The objective of the proposed project is to provide a long-term solution to the ongoing sedimentation in lower Deroche Creek to mitigate future impacts on infrastructure and salmon habitat. The proposed project is expected to be completed throughout 2024, with instream works scheduled for August 1 – September 15.

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Latest update

August 23, 2024 – Fisheries and Oceans Canada issued its Notice of Determination and determined that the project is not likely to cause significant adverse environmental effects.

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Key documents

Key documents
Document Number Document Title File Date
1 Notice of Determination - Fisheries and Oceans Canada (DFO) - August 23, 2024

Contacts

Fish and Fish Habitat Protection Program Fisheries and Oceans Canada
200 - 401 Burrard Street
Vancouver, British Columbia V6C 3S4
Email: DFO.PACFPP.PPPPAC.MPO@dfo-mpo.gc.ca


  • Location

    • Deroche (British Columbia)

  • Nature of Activity

    • Other, not otherwise specified
    • Remediation and conservation

  • Assessment Status

    Completed

  • Start Date

    2024-04-02

  • Proponent

    BC Ministry of Environment and Climate Change Strategy

  • Authorities

    • Fisheries and Oceans Canada

  • Assessment Type

    Project on federal lands

  • Reference Number

    88463
Disclaimer

This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

 

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...within 200 kilometres
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