Overview
Passaic-class monitor used extensively against Confederate coastal defenses.
USS Patapsco is associated with United States and United States Navy. It belonged to Passaic class, so the class page provides the shared design history while this page concentrates on the individual ship.
Construction and identity
The available construction record identifies USS Patapsco as built by Harlan & Hollingsworth and launched on 1862-09-27.
The ship's documented identity includes service with United States Navy.
Service history
Patapsco operated around Charleston for much of 1863–1865 and was sunk by a mine on 15 January 1865 while covering mine-clearing boats.
The ship's configuration should be interpreted through the documented class and the dates attached to this individual vessel; equipment should not be assumed to have remained unchanged throughout service.
Class context: Passaic class
The Passaic class enlarged and refined the single-turret monitor concept after USS Monitor. Ten ships were built for Union coastal operations during the Civil War, combining very low freeboard with a rotating armored turret and heavy smoothbore or rifled weapons.
As a member of Passaic class, USS Patapsco shared the class's documented design framework and intended roles of Coastal combatant, Blockade, and Shore bombardment. Individual refits, transfers, and wartime changes belong to this ship only when separately documented.
Later service and disposition
Sunk by a mine during operations in Charleston Harbor. The associated date is 1865-01-15. The recorded location is Charleston Harbor, South Carolina.
USS Patapsco matters as an individual career within Passaic class, allowing class-wide design history to be separated from this ship's own construction, identities, service, and fate.
Class relationship
This ship is recorded as a member of Passaic class. Shared design history belongs on the class page; this page concentrates on the individual hull where evidence is available.
Sources and further reading
- NH 59269 Panoramic View of Charleston Harbor — Advance of Ironclads to the Attack, April 7th, 1863 ↗Naval History and Heritage Command · accessed 2026-09-18
- Passaic I (Ironclad Monitor) ↗Naval History and Heritage Command · accessed 2026-09-18
- Weehawken I (Monitor) ↗Naval History and Heritage Command · accessed 2026-09-18
- Passaic-class monitor ↗Wikipedia contributors · accessed 2026-09-18