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 project team encountered some unforeseen geotechnical and environmental issues at the site which has caused schedule impacts and required additional design and mitigation before proceeding with the tender.
  • The ministry and Xaxli’p are nearing completion on an agreement for construction of the stabilization measures within their reserve boundary.
  • Phase 1 work is now underway, which includes installing advanced soil anchors. More information can be found here.  
  • The Phase 2 (Main Contract) design is being finalized before the ministry tenders the contract later this winter through a competitive bidding process.
  • 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 on March 16th (at the Xaxli’p Office) and March 29th (at the Lillooet Rec Centre) in 2017
  • Xaxli’p community information sessions were recently held from September 21st-23rd, 2018 in Kamloops, Lillooet and Vancouver

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

Contact Information

For more information, please contact Scotty McKenzie, Ministry Project Manager by e-mail at Scott.McKenzie@gov.bc.ca