Butte in Silver Bow County, Montana — The American West (Mountains)
Northern Pacific Locomotive 25
Photographed by Cosmos Mariner, July 6, 2024
1. Northern Pacific Locomotive 25 Marker
Presented to the children of Butte by the Northern Pacific Railway on this July 3, 1958
125 ton Big Hill Hog one of 13 built 1899 by Schenectady Locomotive Works in Schenectady, New York. This class of engine was used on the Butte Mountain (Continental Divide) between Butte and Whitehall.
Labor and machinery provided by The Anaconda Company & B A & P Railway Co.
Butte Jaycees 1957-1958
Project Chairman W. L. Baltezar
Grateful appreciation to the following
P. L. Holenstein C. A. Kestle, Architect
Dr. D. A. George City of Butte
County Commissioners Trevillion-Johnson
Iron Workers No. 107
Erected 1958 by Butte Jaycees.
Topics. This historical marker is listed in these topic lists: Charity & Public Work • Fraternal or Sororal Organizations • Industry & Commerce • Railroads & Streetcars. A significant historical year for this entry is 1899.
Location. 46° 0.062′ N, 112° 31.156′ W. Marker is in Butte, Montana, in Silver Bow County. It is on Harrison Avenue (Business Interstate 15/90) just east of Olympia Avenue, on the right when traveling east. The marker and locomotive are
this page online
Regionally, this marker is in andspecifically outhwest Montana, in Gold West Country, in Mining Country. It is also in the American Mountain West and in the Lewis & Clark Corridor. Globally, it is in North America, the Rocky Mountains, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once Ruperts Land and also the Louisiana Purchase.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Town Pump Trail (within shouting distance of this marker); St. Joseph's Catholic Church (approx. half a mile away); Socialist Hall (approx. 0.6 miles away); Mining The Berkeley Pit 1955-1982 (approx. Ύ mile away); The Berkeley Pit: The Water Returns (approx. Ύ mile away); The Berkeley Pit Threatens the Water (approx. Ύ mile away); Butte Mining Through the Years (approx. Ύ mile away); Milwaukee Depot (approx. one mile away). Touch for a list and map
Photographed by Cosmos Mariner, July 6, 2024
2. Northern Pacific Locomotive 25 Marker
The marker is mounted at ground level in front of the restored locomotive, at the entrance to the Butte Civic Center parking lot. The restored locomotive and tender are surrounded by a chain link fence.
Also see . . . Northern Pacific Y-1 #25 (rgusrail.com).
Excerpt: This Consolidation type (2-8-0) was one of Alco-Schenectady's first tandem compound locomotives. Total engine weight: 172,500 lbs, with 152,500 lbs on the 54 drivers. #25 has an engine wheelbase of 23 7 and driver wheelbase of 15.(Submitted on August 13, 2026, by Cosmos Mariner of Cape Canaveral, Florida.)In this design, each pair of high- and low-pressure cylinders were cast as a single unit with one half of the smokebox saddle on each side of the engine. The high-pressure cylinders were bolted to the front of the low-pressure cylinders, with the piston valves mounted on the same valve spindle in a common steam chest. The steam was admitted to the same side of each piston simultaneously through a complex system of ports in the high-pressure cylinder. Spent steam was then conveyed to the low-pressure cylinder from where it was exhausted after use. Compounding enjoyed a vogue in the US at the turn of the century. The main advantage was claimed to be lower fuel and water consumption, but the complex tandem compound system increased maintenance costs, which largely offset any fuel economies.
Photographed by Cosmos Mariner, July 6, 2024
3. Northern Pacific Locomotive 25
Photographed by Cosmos Mariner, July 6, 2024
4. Northern Pacific Locomotive 25
Photographed by Cosmos Mariner, July 6, 2024
5. Northern Pacific Locomotive 25
Photographed by Cosmos Mariner, July 6, 2024
6. Northern Pacific Tender & Locomotive 25
Photographed by Cosmos Mariner, July 6, 2024
7. Northern Pacific Locomotive 25 & Tender
Credits. This page was last revised on August 14, 2026. It was originally submitted on August 12, 2026, by Cosmos Mariner of Cape Canaveral, Florida. This page has been viewed 10 times since then. Photos: 1, 2, 3, 4, 5, 6. submitted on August 13, 2026, by Cosmos Mariner of Cape Canaveral, Florida. 7. submitted on August 14, 2026, by Cosmos Mariner of Cape Canaveral, Florida.
