The Brockville Tunnel was Canada’s first railway tunnel, constructed between 1854 and 1860 beneath downtown Brockville, Ontario. This historic restoration project aimed to repurpose the tunnel for recreational, tourism, and economic development purposes while preserving its architectural and geological features.
Key restoration tasks included reinforcing masonry, rebuilding sections of the masonry, replacing stones, over 1 kilometre of tuck-pointing, and masonry cleaning. The project also involved the installation of steel framing and modern lighting, enhancing the tunnel’s accessibility and appeal.
As the prime general contractor, we managed and coordinated multiple subcontractors and tradespeople, including masons and steelworkers, to execute the project effectively and within established guidelines.
The project included but was not limited to the following:
- Installed Cintec anchors to reinforce the masonry at the South Portal and stabilize the arch.
- Repointed deteriorated mortar joints and dismantled and rebuilt loose or bulging masonry sections.
- Replaced damaged stones as necessary to maintain structural integrity.
- Performed tuck-pointing along the entire kilometre-long masonry liner, followed by thorough cleaning to restore the original appearance.
- Conducted parging and rendering repairs to improve surface integrity.
- Rebuilt specific areas of brickwork and salvaged and repaired original stones.
- Performed detailed tests on mortar and stones to ensure compatibility with historic materials.
- Documented existing conditions and each step of the dismantling and rebuilding processes.
- Produced engineered shop drawings and detailed methodology statements for all repair techniques, adhering to heritage conservation standards.
Special Considerations
The tunnel’s confined environment posed several challenges, including limited space, restricted lighting, and tight scheduling. To navigate these challenges, we installed temporary lighting and carefully planned scaffold placements to maximize available space. Equipment and materials were stored off-site at our warehouse, with just-in-time deliveries arranged to minimize clutter and facilitate smooth operations.
Working alongside the prime architect and conservators, we maintained close coordination with multiple subcontractors to ensure that all work adhered to the Guidelines and Standards for the Conservation of Historic Places in Canada. This approach allowed us to complete the restoration within the required timeframe and preserve the tunnel as a safe and accessible public space that honours its industrial heritage.
Please note that this project summary offers just a brief look at the work and challenges undertaken; for a more detailed scope of the project, please reach out to us.
