Skip to main content
Start of main content

Underwater Archaeology – Nassau Mills Dam at Lock 22, Trent-Severn Waterway

An underwater archaeological impact assessment of submerged historical structures associated with early dam construction on the waterway

  • 1


  • 2


  • 9

    Underwater Features

  • Peterborough, Ontario

    Peterborough, Ontario

Using a remotely operated vehicle in an innovative way to locate underwater heritage

At almost 400 kilometres long, the scenic Trent-Severn Waterway is a meandering canal route that connects Lake Ontario to Lake Huron. With its system of functioning locks and dams controlling the water levels, this National Historic Site of Canada is operated by Parks Canada. They selected us to conduct an underwater archaeological impact assessment at Nassau Mills Dam at Lock 22 to document known underwater archaeological resources.

Conducting underwater archaeological work near an operating dam has safety and logistical issues, so we had to get creative. Our Underwater Archaeology team came up with an innovative approach. By using a remotely operated vehicle (ROV) we located, documented, and photographed remnant underwater archaeological resources. From the images, our team used photogrammetry—digital image capturing and measurement interpretation—to produce 3D models of the archaeological features. The 3D models were then turned into georeferenced orthomosaics—a high-resolution, highly detailed geometrically corrected map—for site plan development. The underwater archaeological assessment identified nine historical features associated with the original nineteenth century wood- and rock-filled dam.

The underwater site plan and 3D models will be used for future archaeological work and to monitor the condition and preservation of the submerged historical features.

At a Glance

  • Parks Canada
  • Deep Trekker

Our underwater archaeology team explores Canada’s past

Our underwater archaeologists used a remotely-operated vehicle (ROV) to explore Canadian history for a dam project. Clients can save time and money—while protecting historical assets—by using an ROV.

Meet Our Team

Darren Kipping, Project Archaeologist

Cultural resource management addresses client needs and development impacts by recording and maintaining heritage above and below water.

Darren Kipping

Project Archaeologist

We're better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

    Contact Us
  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

    Join the Team
End of main content
To top