Snagboat

USS Benton, for example, was a commercial snagboat quickly converted by the Union Army to a river gunboat when the American Civil War broke out.

Seizer was a wooden-hulled, stern-wheel steamship that served as the first snagboat for the United States Army Corps of Engineers on the Sacramento River.

[1] Yuba was a stern-wheeled, shallow draft steamship ordered by the United States Army Corps of Engineers) to serve as a snagboat on the Sacramento River after the Seizer (240 GRT, 1881), had retired in 1921[2] In the early 19th century, settlers found that much of the Red river's length in Louisiana was unnavigable because of a collection of fallen trees that formed a Great Raft over 160 miles (260 km) long.

In northern British Columbia, Department of Public Works snagboats operated out of Prince Rupert and cleared the waters of the Nass, Ecstall, and Skeena rivers.

After the 1920s, most of the traffic on the Fraser was tug and barge service along with deep sea shipping in the lower reaches of the river, and a greater portion of the snagboat's assignments was in maintenance of government docks and aids to navigation.