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Halifax Harbour Solutions Cleanup

Largest municipal infrastructure project ever completed in Atlantic Canada

  • 250

    Years of Pollution

  • $330M

    Capital Budget

  • 300K

    Halifax Residents

  • Halifax, Nova Scotia

    Halifax, Nova Scotia

Keeping wastewater out of Halifax's deepwater harbours

The municipality of Halifax was releasing 180 million liters of untreated wastewater into one of the world’s largest deepwater, ice-free harbours each day. To remedy this situation, three sewage treatment plants were completed over a seven-year period. We provided specialized geotechnical engineering services throughout the design phase for each plant. During construction, our personnel were on-site to observe the excavation, foundation construction, installation of rock anchors, and placement of fill materials and concrete.

For the Halifax plant, we contributed to the design of the rock anchor system that supported the rock faces during excavation of a 30 metre deep wet well in variable quality bedrock and resists the large hydrostatic forces behind the walls and beneath the floor slab. A kilometre-long consolidation tunnel collects wastewater from several pipelines and delivers it to the plant. We completed the geotechnical investigation and provided design parameters and site specific stabilization measures for the tunnel exit point. For the Dartmouth plant, we inspected the dynamic compaction operations used to compact the loose fill material, which ranged in thickness from 2 to 10 metres.

At a Glance

Meet Our Team

James Mitchell, Managing Principal, Geotechnical Engineering

Using safety and ethics as a guide, I am proud of the high quality services our Geotechnical team delivers to our clients.
James  Mitchell Managing Principal, Geotechnical Engineering Read More

James  Mitchell

Managing Principal, Geotechnical Engineering

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