Lake Champlain Projects, USA
Depth of lake - 122 m (400 ft) max
Length of the Champlain Canal - 103 km (64 miles)
Sailing canal boats - 250 built
General Butler built - 1862
General Butler sunk - 1876
"After three decades working in Lake Champlain's cold, dark waters, it may have been the most extraordinary sight I had ever seen. The Lake Champlain Maritime Museum's side-sonar survey team of Fred Fayette, Peter Barranco, and Tom and Pat Manley of Middlebury College had located an intriguing anomaly in the lake's deep water. Our instruments told us the object rose more than 9 m (30 ft) off the bottom, far too tall for any of Lake Champlain's wooden shipwrecks. It must be geological, perhaps an oddly shaped boulder dropped 10,000 years ago by a receding glacier, we agreed. Although it did not look like a shipwreck, we still needed to identify what lay more than 30 m (100 ft) below us. As I descended slowly into darkness I was left with only my dive light to illuminate a narrow channel of water in front of me. I could scarcely believe it as the sodden timbers of a boat's transom appeared, towering above the lake bottom. At that moment I knew I had solved a 175-year-old tragic mystery with the discovery of the canal schooner Troy of Westport." - Arthur Cohn
Source
Cohn, Arthur, "The Sailing Canal Boats of Lake Champlain," in "Beneath the Seven Seas," edited by George F. Bass, pp. 226-9. New York and London, 2005.
The wreck of yet another luckless canal boat, sunk with a cargo of cut stone blocks off Diamond Island. Despite their ubiquity (or perhaps because of it), the canal boat wrecks of Lake Champlain have undergone only limited archaeological study.