Passaic-class monitor

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USS Lehigh on the James River
Class overview
Builders	Continental Iron Works (Greenpoint, NY) Harlan & Hollingsworth Harrison Loring Reaney, Son & Archbold Donohue, Ryan & Secor Atlantic Iron Works
Preceded by	USS Monitor
Succeeded by	Canonicus class
Subclasses	Uragan class
In commission	25 November 1862 – 1899
Completed	10
Lost	2
General characteristics
Type	Monitor
Displacement	1,335 tons
Tons burthen	844 (bm)[1]
Length	200 ft (61 m) overall
Beam	46 ft (14 m)
Draught	10 ft 6 in (3.20 m)
Propulsion	2 Martin boilers, 1-shaft Ericsson vibrating lever engine, 320 ihp (240 kW)
Speed	7 knots (13 km/h; 8.1 mph)
Complement	75
Armament	1 × 15-inch (380 mm) smoothbore Dahlgren gun 1 × 11-inch (280 mm) smoothbore Dahlgren gun Lehigh, Patapsco: 1 × 15-inch (380 mm) smoothbore Dahlgren gun 1 × 8-inch (200 mm) Parrott rifle Camanche: 2 × 15-inch (380 mm) smoothbore Dahlgren guns
Armor	Iron Side: 3–5 in (76–127 mm) Turret: 11 in (280 mm) Deck: 1 in (25 mm)

The Passaic-class ironclad monitors of the U.S. Navy saw service in the U.S. Civil War and the Spanish–American War. The class was an improved version of USS Monitor equipped with a 15-inch Dahlgren gun in place of one of the 11-inch guns.^[2]