Collecting geotechnical data for the design and implementation of remedial measures
Wreck Cove is the largest hydro station in Nova Scotia and produces approximately one third of the province’s hydroelectricity. Tunnel T-2, one of the station’s water conveyance tunnels, was constructed in the 1970s to convey water from the Wreck Cove Reservoir to Surge Lake, the head pond of the station. As a crucial part of providing clean, renewable energy, a hydro plant like the Wreck Cove station requires upgrading to continue operating. Following our tunnel condition assessment, Nova Scotia Power engaged us to support the design and tendering of remedial measures for the aging tunnel excavated in rock.
During our condition assessment, we identified a major collapse in the tunnel that required extensive remediation. Collecting geotechnical data to support the proposed design and construction of remedial measures, we conducted two drilling investigations. These comprised nine geotechnical boreholes, detailed core logging, televiewer surveys, and hydraulic conductivity testing. Our team performed stability analyses and developed and evaluated remedial options for the rehabilitation of the collapsed section within Tunnel T-2. We also provided conceptional designs for the remedial options, such as a bypass tunnel, and prepared cost estimates for these options.
In support of the tender phase of the project, we prepared technical specifications and drawings to help Nova Scotia Power take the next steps for the rehabilitation of the tunnel.
At a Glance
- Offices
- Client
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- Nova Scotia Power Inc.
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.
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.
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