Trent-Severn Waterway National Historic Site

Public Safety Notice: Six Mile Lake Dam

Issued: January 22, 2024

GEORGIAN BAY, ONTARIO – January 22, 2024 – Residents and visitors are advised to exercise extreme caution around the waterway at Six Mile Lake Dam, as ice conditions may be unpredictable and unsafe.

Higher than normal water flows can be expected at Six Mile Lake Dam while work continues on the Whites Portage Dam Reconstruction Project. Currently, the dam is partially open to regulate flows and divert water from the active construction zone.

The Whites Portage Dam is the main flood management dam for Six Mile Lake and is one of seven owned and operated by Parks Canada in the area. Originally constructed in 1918, the dam regulates the lake’s water level and outflow into Gloucester Pool.

The project will see the complete replacement of the current dam with a new one in the same location and orientation. Work began in July of 2023, with an expected end date of 2025.

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