Between 1803 and 1822, the Caledonian Canal was built, passing through Gairlochy, over the original site of the River Lochy. Two locks were built for access onto Loch Lochy, but only one, the Upper Lock, is still in use. At the lower lock an end pivoted swingbridge and lock keepers' house is provided to carry the B8005 road and Great Glen Way over the canal.