Highway 99 - Ten Mile Slide

Highway 99 is the most direct connection between Lillooet and Kamloops and is vital to the local and regional economy, as well as the Xaxli’p community. This project will address the slope instability at the Ten Mile Slide location.

The scope of the project includes planning, engineering and construction to implement stabilization measures above and below Highway 99 as well as the reconstruction of the highway.

Oblique Map View of Ten Mile Slide


  • The ministry and Xaxli’p completed an agreement in December 2018 for construction of the stabilization measures within their reserve boundary.
  • Schedule adjustments and additional design work prior to tender were required due to unforeseen geotechnical and environmental issues at the site.
  • Advanced soil anchor work (Phase 1) was successfully completed in February 2019, and as a result, load restrictions were increased to 27,000kg GVW.
  • The Phase 2 (Main Contract)  tender will close in July and construction is anticipated to commence in late Summer 2019. Construction is expected to be completed in fall 2020.

Project cost

  • The overall project is estimated at $60M.

Project Benefits

  • Improves safety and reliability for motorists, the trucking industry and emergency vehicles (Regional hospital services are provided in Kamloops)
  • Maintains community connectivity and cohesiveness for Xaxli’p while reducing hardships as a result of slide activity
  • Maintains the most direct connection between Lillooet and Kamloops, which is vital to the local and regional economy, as well as the Xaxli’p community
  • Responds to requests dating back to the mid-90’s for a long term solution
  • Limits future costs associated with extra-ordinary maintenance and stabilization measures due to retrogression

Public Consultation

  • Consultation with the Xaxli’p community and key stakeholders began early and is ongoing
  • Public information sessions were held at both the Xaxli’p Office and Lillooet Rec Centre in March 2017
  • Additional Xaxli’p community information sessions were held in September 2018 in Kamloops, Lillooet and Vancouver

The following posters and boards were displayed at the community information sessions and are available for viewing through the links below: