USS Waxsaw, a single-turreted, twin-screw monitor, was laid down in March 1863, before the official order had been placed, at Baltimore, Maryland, by A. & W. Denmead & Son; launched on 4 May 1865; and completed on 21 October 1865. Waxsaw was a Casco-class, light-draft monitor intended for service in the shallow bays, rivers, and inlets of the Confederacy. These warships sacrificed armor plate for a shallow draft and were fitted with a ballast compartment designed to lower them in the water during battle.