| Berlin Mills Railway 7 | |
|---|---|
| Ca. 1991 in Bellows Falls, VT | |
| Power type | Steam |
| Builder | Vulcan Iron Works |
| Serial number | 1679 |
| Model | I-15-S |
| Build date | January 1911 |
| Configuration | 2-4-2ST |
| UIC classification | 1′B1′ n2tG |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Leading wheel diameter |
26 in (660 mm) |
| Driver diameter | 44 in (1,118 mm) |
| Trailing wheel diameter |
26 in (660 mm) |
| Length | 30 ft 9 in (9.37 m) |
| Width | 9 ft 10 in (3.00 m) |
| Weight on drivers | 85,000 lb (38.6 tonnes) |
| Locomotive weight | 115,000 lb (52.2 tonnes) |
| Fuel type | Coal |
| Fuel capacity | 2 short tons (1.8 tonnes) |
| Water capacity | 1,500 US gal (5,700 l; 1,200 imp gal) |
| Boiler pressure | 140 psi (0.97 MPa) |
| Cylinders | Two, outside |
| Cylinder size | 17 × 24 in (432 × 610 mm) |
| Valve type | Slide valves |
| Tractive effort | 18,759 lbf (83.44 kN) |
| Career | Berlin Mills Railway, Groveton Papers Company, Woodsville, Blackmount and Haverhill Railroad |
| Number | 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. |
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 of 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.