Upper Brewers Mills Dive Report – Kingston, Ontario, Canada

Site Overview

•Type: Shore-accessible freshwater dive site

•Location: Upper Brewers Mills Lockstation, Kingston, Ontario, Canada

•Average Rating: 2.00 out of 5 by divers

•Maximum Depth: 26–30 feet (8–9 meters)

•Average Visibility: 16–20 feet (5–6 meters); Visibility often limited to 3–4 feet near the surface

•Water Temperature: Below 50°F (10°C), ice-free year-round due to the hydroelectric dam downstream

Dive Highlights

Historical Features:

•Locks and Dams: Two manually operated locks dating back to 1830 and earth embankment dams on both sides from the same period.

•Historical Buildings:

•A lockmaster’s house (1840) designed for defense.

•A canalman’s house built in 1897.

•Cultural Artifacts: Reported discoveries include clay pipes and torpedo bottles, remnants of local historical structures like a store grist mill.

•Heritage Status: Part of the Rideau Canal heritage system, managed by Parks Canada, with strict rules against artifact removal.

Natural Features:

•Marine Life: Includes oysters, dead fish, and other small aquatic life.

•Underwater Topography: Features wooden planking, bottles, and scattered debris from past human activities.

Diving Conditions

•Visibility:

•Generally ranges between 11–15 feet (3–5 meters) below 15 feet.

•Can be reduced to 3–4 feet near the surface due to flow and ice downstream.

•Water Movement: Divers should be cautious of currents, particularly when the Rideau locks system is operational or during high boat traffic.

•Temperature: Cold water, but warmer than surrounding areas due to the downstream hydroelectric dam.

Accessibility:

•Entry and exit points are made easier by a wooden bridge nearby.

•The site is shallow and ice-free year-round, making it accessible even in colder months.

Safety & Advisories

•Artifact Removal: Strictly prohibited by Parks Canada.

•Current Awareness: Be mindful of boat traffic and strong currents during operational Lock periods.

•Visibility Challenges: Limited Visibility above 15 feet can hinder navigation and exploration.

Dive Experience

•Notable Finds: Clay pipes, torpedo bottles, wooden remnants, and relics tied to historical structures.

•Challenges: Mixed reports on Visibility, with some divers enjoying glassy water and unique marine life, while others faced murky conditions.

•Popularity: The site is valued for its historical and natural blend, appealing to divers interested in both underwater exploration and cultural heritage.

Summary

Upper Brewers Mills offers a unique opportunity for divers to explore a blend of history and natural underwater features. Though Visibility and conditions can vary widely, the site provides a year-round diving option in the Kingston area. With historical artifacts and cultural significance, it appeals to divers who appreciate a connection to the past. However, potential currents, cold water, and limited Visibility may pose challenges for less experienced divers.

Whether you’re drawn to the site’s Rideau Canal heritage, underwater relics, or its natural attractions, Upper Brewers Mills is a destination worth exploring for a mix of history and aquatic adventure.