Culvert Replacement at Canadian Forces Ammunition Depot Rocky Point

Canadian Forces Ammunition Depot (CFAD) Rocky Point is a lodger unit of Canadian Forces Base (CFB) Esquimalt located on a peninsula approximately 18km southwest straight distance from Victoria, British Columbia in the District of Metchosin.

Due to the presence of ammunitions stored on the property, a local DND fire detachment is located at CFAD to be able to respond immediately to any fire that could threaten public safety. Access to the south of the property is via gravel range roads - ensuring these roads are maintained and passable is vital to ensuring fire truck access and immediate fire response.

A 900 millimetre, steel corrugated culvert of 12 metres in length with two concrete 90 centimetre headwalls on the primary north-south access road (Figure 1) was washed out by excessive rainfall in fall 2021. Upon inspection, the culvert bottom was also found to have large holes or be completely absent in places due to excessive corrosion. The existing culvert cannot safely support the weight of fire trucks using the road and needs to be removed and replaced to maintain fire response access.

Culvert replacement is expected to be straightforward and completed in the dry on this seasonal, intermittent watercourse. Disturbance to surrounding vegetation and soils will be minimized and work will include:
• Clearing of vegetation (primarily invasive scotch broom and gorse on the outlet/east side and a treed area on the inlet/west side);
• Removal of concrete headwalls with excavator or backhoe;
• Removal of culvert overfill with excavator or backhoe, removal of culvert and culvert debris with appropriate disposal;
• Preparation of culvert bed with 3/4 road base grade gravel using a backhoe or excavator;
• Installation of prefabricated, concrete 900 millimetre diameter culvert of 12 metres in length. If concrete not available, a plastic corrugated culvert of the same size will be used. Culvert to be embedded 1/3 of culvert depth;
• Placement of substrate in culvert to 1/3 culvert depth;
• Installation of prefabricated, 90 centimetre concrete headwalls;
• Backfilling with minimum of 300 millimetre cover;
• Placement of erosion protection (ie riprap) at culvert inlet and outlet;
• Regrading of road; and
• Reseeding with native seed mix where required.


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

July 16, 2022 – The public comment period on the project is closed. The Department of National Defence is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects.

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Contacts

Becky MacInnis
Department of National Defence
Becky MacInnis, Environment Officer / MARPAC Formation Safety and Environment
Formation Safety and Environment, Canadian Forces Base Esquimalt
PO Box 17000 Stn Forces
Victoria, British Columbia V9A 7N2
Email: Rebecca.MacInnis@forces.gc.ca


  • Location

    • Canadian Forces Ammunition Depot (CFAD) Rocky Point , Metchosin (British Columbia)
  • Nature of Activity

    • Water Management
  • Assessment Status

    In progress
  • Start Date

    2022-07-06
  • Proponent

    Department of National Defence
  • Authorities

    • Department of National Defence
  • Assessment Type

    Project on federal lands
  • Reference Number

    83766

Nearby assessments

..within 200 kilometres
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