White's Portage Dam Replacement, Trent-Severn Waterway

The project is a complete replacement of the dam. The scope of work includes 2-phased reconstruction of the existing structure. Project activities include, but are not limited to, replacement of the dam complete with abutments, sluices, new stop logs, new machinery, new decks, operator safety features, railing for public safety, landscape and embankment works, commissioning, demolition of the old dam and site restoration. The dam is to be built in two phases and will last 2 years.
Due to the discharge impediment caused by the presence of bedrock outcrop along the downstream shore, excavation and removal of rock, which will maximise the discharge capacity of the Six Mile Lake system and reduce the risk of flooding during extreme events. Rock removal may result in some appearance changes and outcrop access to the falls.

Latest update

September 12, 2023 - The assessment decision statement has been issued to the proponent.



Trent-Severn Waterway National Historic Site
P.O. Box 567
Peterborough, Ontario K9J 6Z6
Telephone: 705-750-4900 or 1-888-773-8888
Email: trentsevern@pc.gc.ca

  • Location

    • Trent-Severn Waterway National Historic Site (Ontario)
  • Nature of Activity

    • Dams and reservoirs
  • Assessment Status

  • Start Date

  • Proponent

    Parks Canada
  • Authorities

    • Fisheries and Oceans Canada
    • Parks Canada Agency
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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