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Highway 363 Moose Jaw Slope Rehabilitation

The Ministry of Highways is holding an information session to share a plan to construct a berm in the Wakamow Valley. Construction of a berm will be used to mitigate the landslide impacting Highway 363 (9th Ave. S.W. Moose Jaw).

Location

Project Location

Site History

Archeological Dig area Wakamow Valley Moose Jaw

1949 - Initial highway route constructed
1985 - Grade raised
2002 - Identified as a geohazard site
2005 - Soil nailing
2016 - Increased landslide activity
2018 - Geotechnical investigation
2023 - Heritage Resource Impact Assessment (HRIA)
2024 - Tender for Construction / Repair

Heritage Resource Impact Assessment

Heritage - archeological area - Hwy 363 Wakamow

Proposed berm construction will impact two important heritage sites:

  • Davies site
  • Garratt site

HRIA conducted Fall 2023:

  • Pedestrian reconnaissance
  • Shovel testing

Artifacts found:

  • Bone and stone tools
  • Pre-contact pottery
  • Historic / contemporary items

Heritage - archeological area - Hwy 363 Wakamow - 9th Ave. southwest Moose Jaw - Artifact 2

Heritage - archeological area - Hwy 363 Wakamow - 9th Ave. southwest Moose Jaw - Artifact

Summary Recommendations

Mitigation:

  • Archaeological monitoring during construction
  • Swamp mat protection of sensitive areas
  • Additional mitigative excavations in spring/summer 2024

Construction - Toe Berm

Berm will be built at the bottom of the existing embankment to reduce risk of further landslides.

Hwy 363 Wakamow - 9th Ave. southwest Moose Jaw toe berm

Berm grading will vary - approximately 55 m wide by 200 m long; 3 to 6 m high

Hwy 363 Wakamow - 9th Ave. southwest Moose Jaw toe berm grade

Construction considerations

Hwy 363 construction Moose Jaw Wakamow Valley

  • Access Road location through Wakamow to be determined by contractor but will be within identified area.
  • Construction planned for Fall 2024 to avoid bird nesting period.
  • Tree clearing will be required -- approval has been obtained from the Wakamow Valley Authority.
  • Tree clearing area will be minimized.
  • Access road and laydown area to be rehabilitated to preconstruction condition once berm construction is complete.
  • No traffic detours will be required for any of the work.
  • Work zone accommodation will be installed as required.

Information Session

You are invited to attend this information session for more information on project details, timelines and heritage investigation results. Alternatively, you will be able to view the materials at the website provided below.

Moose Jaw Event Centre
110-1st Ave NW, Moose Jaw, SK
April 30, 2024
4:00 – 7:00 p.m. (come and go format)

Next Steps

  • Heritage Work - complete pre-impact archaeological excavations in spring/summer 2024
  • Post construction tenders to SaskTenders
  • Select contractor (target June 2024)
  • Berm construction including access road removal, site cleanup, and topsoil replacement (target - Fall 2024)
  • Site and road rehabilitation (Spring 2025)

For more information, please contact:

Matthew Stephenson, Ministry of Highways
Email