USS Ammonoosuc (1864)

Ammonoosuc and Neshaminy class
History
United States
Builder	Boston Navy Yard
Laid down	during the first half of 1863
Launched	21 July 1864
In service	1868 (sea trials)
Out of service	1883
Renamed	Iowa on 15 May 1869
Stricken	1883 (est.)
Fate	Sold at Boston, Massachusetts, on 27 September 1883
General characteristics
Displacement	3,850 tons
Length	335 ft (102 m)
Beam	44 ft 4 in (13.51 m)
Draught	depth of hold 16 ft 6 in (5.03 m) draft 10 ft 6 in (3.20 m)
Propulsion	Morgan Iron Works steam engines
Speed	17.11 knots
Complement	not known
Armament	ten 9-inch smoothbores three 60-pounder rifles two 24-pounder smoothbores

The USS Ammonoosuc (later renamed USS Iowa) was a steam frigate laid down by the Boston Navy Yard during the American Civil War and was launched, apparently without ceremony, on 21 July 1864. She was intended to be used against the British should England decide to take the side of the Confederate States of America and attack the Northern part of the United States. However, as the war progressed, England's support of the Confederacy diminished, and the fast and powerful Ammonoosuc was never placed into service.