Kahkewistahaw First Nation Lagoon Upgrade

The Proposed Project

Construct sewer infrastructure upgrades for the Kahkewistahaw First Nation community. Project will include expanding the two celled facultative sewage treatment lagoon with a primary cell expansion of approx. 1.51 Ha (2.01 ha total), and a storage cell expansion of approx. 26,600 Cu.M  (66,600 cubic meters total).

The lagoon cell expansion will involve clearing and grubbing and topsoil stripping of the proposed lagoon expansion area. Upon completion of topsoil stripping, common excavation will begin excavating to the design depths of the floor. Excess material will be used for the construction of the cell walls. Upon excavation completion and verified compaction the cell will be lined with a HDPE liner to make a water tight structure. Protective sand layer will be installed on the new expanded cells. Topsoil will be spread on the exterior of the berms and seed will be planted.

Standard construction waste is expected to be generated throughout project construction. The successful contractor will be
responsible to manage, collect, and dispose of all construction generated waste at a designated landfill.

After construction, the expanded lagoon cells will handle sewage/wastewater generated by the community.

All wastewater received by the lagoon will be treated through natural treatment processes and stored for a period of approximately 220 days according to design guidelines and regulations prior to release. Upon conclusion of the one year storage period, the treated effluent will be released to the environment through a controlled discharge to the modified storage cell.

Life expectancy of this infrastructure ranges from 20-30 years before further upgrades are required.


Latest update

March 8, 2022 - Indigenous Services Canada issued its notice of determination Notice of Determination for Kahkewistahaw First Nation Lagoon Upgrade - Canada.ca (iaac-aeic.gc.ca) 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 for Kahkewistahaw First Nation Lagoon Upgrade - March 8, 2022
1 Public Comment Period on Intent to Make a Determination - June 17, 2021


Indigenous Services Canada
Alvin Hamilton Building, 1783 Hamilton Street
Regina, Saskatchewan S4P 2B6
Telephone: 306-581-3134
Email: isc-skenv@sac-isc.gc.ca

  • Location

    • Kahkewistahaw IR 72 (Saskatchewan)
  • Nature of Activity

    • Water Management
    • Waste Management
  • Assessment Status

  • Start Date

  • Proponent

    Kahkewistahaw First Nation
  • Authorities

    • Indigenous Services 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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