Upper Brewers Mills in Kingston, Ontario, Canada, is a freshwater dive site with both historical and natural attractions. This shore-accessible site has an average rating of 2.00 out of 5 from scuba divers. The maximum depth ranges from 26 to 30 feet (8 to 9 meters), and the average visibility is 16 to 20 feet (5 to 6 meters).
The dive takes place at the Upper Brewers Mills Lockstation, which is set in an excavated channel with the river passing to the right. The area features cultural resources, including two manually operated locks dating back to 1830. Earth embankment dams can also be found on both sides of the lock from the same period. There are historical buildings on-site, including a defensible lockmaster’s house from 1840 and a canalman’s house built in 1897.
Divers have reported mixed experiences at this site. Some have found interesting artifacts, such as clay pipes and a torpedo bottle. However, visibility can be limited, usually ranging from 3 to 4 feet (less than 2 feet above 15 feet) due to the flow and ice in the area, especially downstream from the locks. It is important to note that removing any artifacts is strictly forbidden by Parks Canada, as the locks are part of the Rideau heritage system.
The site is shallow and ice-free year-round, making it accessible for divers even during colder months. The water is warmer due to the presence of a hydroelectric dam downstream. However, divers must be mindful of the current, especially when the Rideau locks system is operational, and boat traffic is present. The potential to find historical items is high, including remnants of a store grist mill and other structures that existed in the area over the years.
Divers have reported average visibility ranging from 11 to 15 feet (3 to 5 meters) and water temperatures under 50°F (10°C). It offers the only open water dive option around Kingston throughout the year.
Despite varying conditions, some divers have had outstanding experiences at the site, witnessing smooth, glassy water and unique marine life below 15 feet. The site has oysters, dead fish, bottles, and bits of wooden planking to explore. Entry and exit are relatively straightforward, facilitated by the presence of a wooden bridge.
Overall, Upper Brewers Mills offers an opportunity to delve into history and natural wonders, making it an interesting destination for divers seeking a mix of cultural and underwater exploration.
