Two rivers feed into the upper end of Loch Glascarnoch, and the Abhainn an Torrain Duibh is crossed by the A835 just before it crosses the watershed to descend west to Ullapool. The bridge is a single span concrete structure which replaces an earlier bridge that appears to have stood on the same spot, despite the flooding of the glen to form Loch Glascarnoch. The abutments are clad in stone, with the parapets also built in stone, a feature which generally disappeared from bridges in later years. The abutments are also buttressed, rising up to the top of the parapets but without proividing pedestrian refuges. Indeed, there is only a token footway on the bridge, where the roadway is wider than to either side of the bridge, so the 'verge lines' continue straight, providing narrow tarred strips to either side. While the bridge may appear to be in the middle of nowhere, it is crossed by large numbers of walkers each year as they complete a round of the Fannich Hills to the south.