Berlin Mills Railway 7

Berlin Mills Railway 7 is a steam locomotive at Steamtown National Historic Site. It was built in 1911 by the Vulcan Iron Works for the Berlin Mills Railway, an industrial line in Berlin, New Hampshire. Number 7 worked there as a switcher until November 1944, when it was sold to the Groveton Papers Company of Groveton, New Hampshire. In 1956, it was finally replaced by a diesel locomotive, ending 45 years of use. After a few years of idleness, though, the locomotive was leased to the Woodsville, Blackmount and Haverhill Steam Railroad, a new tourist railroad near Haverhill. Number 7 operated as the only locomotive for this company until it folded after 1963. It was ultimately donated to Steamtown by the Groveton Paper Company in 1969.

Berlin Mills Railway 7
Ca. 1991 in Bellows Falls, VT
Type and origin Power type Steam Builder Vulcan Iron Works Serial number 1679 Model I-15-S Build date January 1911
Specifications Configuration: ​  • Whyte 2-4-2ST  • UIC 1′B1′ n2tG Gauge 4 ft 8 1⁄2 in (1,435 mm) Leading dia. 26 in (660 mm) Driver dia. 44 in (1,118 mm) Trailing dia. 26 in (660 mm) Length 30 ft 9 in (9.37 m) Width 9 ft 10 in (3.00 m) Adhesive weight 85,000 lb (38.6 tonnes) Loco weight 115,000 lb (52.2 tonnes) Fuel type Coal Fuel capacity 2 short tons (1.8 tonnes) Water cap 1,500 US gal (5,700 l; 1,200 imp gal) Boiler pressure 140 psi (0.97 MPa) Cylinders Two, outside Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve type Slide valves
Performance figures Tractive effort 18,759 lbf (83.44 kN)
Career Operators Berlin Mills Railway, Groveton Papers Company, Woodsville, Blackmount and Haverhill Railroad Numbers 7 Locale White Mountains Region Last run 1963 Retired January 25, 1956 Restored 1962 Current owner Steamtown National Historic Site Disposition Sits inoperable in the yard at Steamtown.