Mountain Road once traveled all the way from the top of Minnechaug Mountain – where it currently ends at a cul-de-sac– all the way to Coop Road near to the Coop Sawmill. Just before connecting, it crossed Roaring Brook. A bridge, very similar to Coop Road Bridge, took it over the water. The difference between the two bridges is Mountain Road Bridge is wider, with six girders instead of Coop’s five, and the footings are stone instead of concrete.
The bridge has been underwater for the past few years due to a beaver dam upstream, but the water receded enough where the girters are once again out of the water.