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Tunnel Condition Assessment and Remediation – Wreck Cove Generating Station

Providing tunneling and rock engineering specialized services

  • ROV


  • 4.9km

    Tunnel T-1

  • 3.6km

    Tunnel T-2

  • Cape Breton, Nova Scotia

    Cape Breton, Nova Scotia

Collecting geotechnical data for remedial recommendations

Wreck Cove Tunnel was constructed in the 1970s in Cape Breton, Nova Scotia, to convey water from the McMillan reservoir to Surge Lake, the head pond of the hydro generating station. As a crucial piece of providing clean, renewable energy, a hydro system like Wreck Cove requires upgrading to continue operating. Nova Scotia Power engaged us to assess Tunnel T-1 and Tunnel T-2—aging, unlined water conveyance tunnels excavated in rock.

Using a remote operated vehicle (ROV), we completed a condition assessment of the two tunnels. Collecting geotechnical data to support the design and construction of remedial measures, we conducted two drilling investigations—comprising nine geotechnical boreholes, detailed core logging, and televiewer surveys and hydraulic conductivity testing. Our team developed and evaluated options for the remediation of a collapsed section within Tunnel T-2, and we performed stability and hydraulic analyses and the conceptional design for remedial options, such as a bypass tunnel.

As a result of our intensive assessments, we provided cost estimates for remedial options. We also prepared technical specifications and drawings for the tender phase of the project to help Nova Scotia Power take the next steps.

At a Glance

  • Nova Scotia Power Inc.
Meet Our Team

Gabriele Mellies, Senior Associate, Senior Geotechnical Engineer

I enjoy problem solving and finding solutions for rock engineering challenges that help our clients and make our communities safer.
Gabriele Mellies Senior Associate, Senior Geotechnical Engineer Read More

John Nichols, Geotechnical Engineer

Client relationships are built on trust. Having their best interests in mind means engaging with them to find a solution they can be proud of.

Sylvia Bryson, Associate, Geotechnical Engineer

I love geotechnical engineering—it’s a puzzle. It’s so satisfying to assemble bits of information until the picture is clear.
Sylvia Bryson Associate, Geotechnical Engineer Read More

Gabriele Mellies

Senior Associate, Senior Geotechnical Engineer

John Nichols

Geotechnical Engineer

Sylvia Bryson

Associate, Geotechnical Engineer

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