KM 458 to KM 676 Culvert Replacements

PSPC requires upgrades to four (4) culvert crossing locations of the Alaska Highway, BC.  The work is proposed to address drainage capacity, structural degradation, drainage structure maintenance and fish passage concerns at the four culvert crossings.  The locations, existing conditions and issues at each of these locations are described below:

  • Km 458.0 Site (approximately 3 km west of Fort Nelson): The existing culvert crossing includes one 900 mm diameter Corrugated Steel Pipe (CSP) culvert which is corroded and currently undersized.
  • Km 596.8 Site (Summit Pass): The existing culvert crossing includes one 1200 mm diameter Wood Stave Culvert which is undersized, significantly deteriorated and at the end of its service life.  The culvert has deformed to a state such that it is at risk of collapse.  The outlet of the culvert is perched, presenting a barrier to potential fish passage upstream.
  • Km 647.4 Site (Toad River): The existing culvert crossing includes one 1200 mm diameter CSP and one 1500 mm diameter CSP which are undersized, corroded and deformed.  The outlets of the existing dual culverts are perched presenting a barrier to potential fish passage upstream.  The culverts are located within a section of highway with vertical geometry which does not meet the Transport Association of Canada design guidelines for the posted speed limit (i.e. vertical sag curve, clear zone).
  • Km 676.2 Site (approximately 28 km west of Toad River): The existing culvert crossing includes one 900 mm diameter CSP culvert which is undersized and subject to debris flows which block large portions of the culvert.  Maintenance to remove the debris from within the culvert is regularly required but difficult to complete due to the relatively small dimeter of the existing culvert.

Upgrading these culvert crossings presents an opportunity to install replacement drainage structures with greater flow capacity, improve\ fish passage with the streams, repair and mitigate erosion concerns, and reduce ongoing maintenance costs.

 


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.

 

Latest update

May 11, 2021 - The assessment decision statement has been issued to the proponent.

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Contacts

Public Services and Procurement Canada
Makrina Haffey, Environmental Specialist
800 Burrard St
Vancouver, British Columbia V6Z 0B9
Telephone: 604-369-8963
Email: Makrina.Haffey@pwgsc-tpsgc.gc.ca


  • Location

    • Alaska Highway (British Columbia)
  • Nature of Activity

    • Highways and Roads
    • Maintenance activities (fences, walls)
  • Assessment Status

    Completed
  • Start Date

    2021-03-01
  • Proponent

    Public Services and Procurement Canada
  • Authorities

    • Public Services and Procurement Canada
  • Assessment Type

    Project on federal lands
  • Reference Number

    81150
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