Cultus Lake Septic Upgrade Project

The current sanitary system at Cultus Lake Laboratory discharges into a septic dispersal field of which is nearing end of life. The current proposal involves updating the septic treatment system and dispersal fields to a gravity fed sewer collection system discharging to a pump station. The gravity line will be installed to collect both the site and the Cultus Lake Park Boards septic on DFO property and then lifted to the pump station.  The installation of a sanitary forcemain will convey flows from the pump station and then discharge flows to a manhole near the property.  The pump station will be located on a developed grass area near the edge of the forested area on the adjacent Cultus Lake Laboratory campus, close to the  Sweltzer River.  The current design is to work only within paved or gravel portions of the existing road to avoid instream disturbances to Sweltzer River and Hatchery Creek. The design will require the forcemain to cross under a culvert within the riparian zone of Hatchery Creek. To reduce the amount of disturbed surface area, the use of Horizontal Directional Drilling (HDD) rather than open-cut trench methodology will be applied. The culvert is part of the Hatchery Creek system.


Key equipment will include: trucks, vehicles, excavation equipment, hydro-vac truck, and horizontal directional drilling equipment.


The proposed project will include the following steps:

•    Supplies will be brought to site by road and then installed or prefabricated items will be brought onsite
•    A crane and/or other machinery to be used to pick up/deploy them in proper position 
•    Installation of piping to the pump station : 200mm diameter PVC gravity sanitary sewer and extension of existing 150mm diameter sanitary pipe, new 100mm diameter HDPE sanitary forcemain
•    Horizontal drilling under the culvert within Hatchery Creek
•    Installation of a new wet-well pump station
•    Tie-in of gravity sanitary with existing off-site distribution box, sanitary system, and new on-site pump station
•    Connection of the new sanitary forcemain with the pump station to convey flows from pump station to manholes


Latest update

April 8, 2024 – The Fisheries and Oceans Canada has issued its Notice of Determination and determined that the project is not likely to cause significant adverse environmental effects.


Key documents

Key documents
Document Number Document Title File Date
2 Notice of Determination: Cultus Lake Septic Upgrade Project PDF (675 KB) April 8, 2024


Fisheries and Oceans Canada Real Property Technical Services Pacific Region
Collin Gagne, Project Engineer
200 - 401 Burrard Street
Victoria, British Columbia V6C 3S4
Telephone: 604-649-6849

  • Location

    • Cultus Lake Laboratory (British Columbia)
  • Nature of Activity

    • Building and Property Development
  • Assessment Status

  • Start Date

  • Proponent

    Fisheries and Oceans Canada - Real Property Safety and Security, Real Property & Technical Support
  • Authorities

    • Fisheries and Oceans Canada
  • Assessment Type

    Project on federal lands
  • Reference Number


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.


Nearby assessments

...within 200 kilometres
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