Featured Project

Muncho Lake, Alaska Highway, BC
Key Services
  • Excavation and Disposal

Public Works and Government Services Canada (PWGSC) acts as the federal custodian for the 90-metre-wide right-of-way (ROW) of the current Alaska Highway alignment between km 133 and km 968 in Northern British Columbia. The highway was constructed in 1942 as a wartime effort and upgraded for public traffic between the 1940s and 1950s.  

Settlements had not existed before the highway construction period along much of the route. Consequently, historic camps, storage areas, refuelling stops, equipment maintenance areas, military bases, airstrips, and dump sites were established as the construction proceeded.  PWGSC manages the associated environmental liabilities within the Alaska Highway contaminated sites portfolio.  We were retained to remediate soil and groundwater contamination at the former Muncho Lake Maintenance Camp, located at km 698 of the Alaska Highway, approximately 240 km west of Fort Nelson, British Columbia, and about 120 km south of the Yukon border. 

Key Challenges
  • Extreme temperatures ranging from ‐30 to ‐40 degrees Celsius, creating a logistical hurdle to ensure worker safety and maintaining the efficiency of heavy equipment operating under these conditions. 
  • The project was located on an isolated stretch of the Alaska Highway – approximately 2 or 3 hours in either direction to reach essential services. 
Key Solutions
  • Milestone devised safety measures tailored to the remote location, including the construction of temporary facilities and the provision of first aid personnel to safeguard workers. 
  • To address soil and groundwater contamination at the site, Milestone constructed an engineered soil treatment facility (STF) and provisioned the setup and operation of a water treatment plant. 

Project Scope

  • Construction of an engineered soil treatment facility (STF) to accommodate contaminated soil from this contract and future fiscal projects. 
  • Excavation, loading, trucking and transfer of contaminated soil from km 698 maintenance yard to km 713 for placement of the STF. 
  • Provision and operation of water treatment plant and equipment to manage accumulated groundwater within the excavations. 
  • Excavation, loading, transport, placement and compaction of granular backfill material to restore excavation areas. 

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