History of Tertiary Highway 812:
Tertiary Highway 812 was a temporary designation applied to the new highway that was under construction between Fort Frances and Dryden in the 1970s and early 1980s. Construction began on the new highway in 1972 at the Fort Frances end of the proposed route. For the first few years, the new highway did not have a route number, as the designation of Highway 812 was not assigned to the route until 1976. Prior to that time, the route was simply known as the Manitou Road. Construction began at the Dryden end of the highway in 1976, and by 1979, the two construction projects had linked up with one another in the area of Upper Manitou Lake. The new highway was completed, paved, and officially opened to traffic in 1980. The highway was renumbered from Highway 812 to Highway 502 in early 1981.
Photographic History of Tertiary Highway 812
Learn More About Tertiary Highway 812