W. T. Preston is a specialized sternwheeler that operated as a snagboat, removing log jams and natural debris that prevented river navigation on several Puget Sound-area rivers. She is now the centerpiece of the Snagboat Heritage Center in Anacortes, Washington. She was designated a National Historic Landmark in 1989. Built in 1939, she is one of two surviving snagboats built and operated by the United States Army Corps of Engineers, and the only one on the American west coast.HistoryW. T. Preston operated from Olympia to Blaine, including the Skagit, Stillaguamish, and Snohomish rivers. Dead trees that reached Puget Sound often became half-submerged deadheads that could pierce the hulls of wooden vessels. The federal government began building snagboats to remove obstructions and facilitate river based commerce. W. T. Preston was named in honor of the only civilian engineer to work for the Army Corps of Engineers at the time of her construction in 1929. W. T. Preston used the main single expansion reciprocating steam engines, as well as many pumps and other hardware from her 1914 predecessor Swinomish. The Swinomish was built to replace the earlier Skagit, the first snagboat to work the rivers of the Puget Sound.
