Bronson Avenue Microtunnelling Project

Discover how Marathon Underground helped install a new watermain in Ottawa, Ontario directly below a major highway, conducting a 200-metre microtunnel through solid rock.

Combined Sewage Storage Tunnel Shoring Project

Learn how Marathon Underground provided shoring design and implementation for Ottawa's Combined Sewage Storage Tunnel (CSST); a project that involved multiple different geological conditions and shoring systems.

Shawinigan Horizontal Directional Drilling Project

Learn how Marathon Underground carried out a complex HDD project directly below the St. Maurice River in Shawinigan, Quebec.

Mining - Lake Shore Gold Design and Civil Works Project

Discover how Marathon Underground handled a dam stability project for Lake Shore Gold that required integration of a shear key to help increase the stability and safety of a tailing pond dam.


Find out how our trenchless technology and auger boring has been used in a wide range of pipeline projects, including under roads, railways, rivers and environmentally-sensitive areas.

Calabogie Dam Rock Anchor Project

Find out how Marathon Underground installed rock anchors to bring stability to the Calabogie dam with Ontario Power Generation – a project that also required mitigating impact to local fish and wildlife.

Geotech & Environmental Drilling

See how Marathon Underground has managed a wide range of complex and challenging geotechnical and environmental drilling projects while maintaining the safety of our workers and the environment.


Canada's Leading Specialty Underground Contractor

Discover the Marathon Underground Difference

Contact us today for more information on our wide range of drilling and underground services.

Call 1-800-669-2086 or email: