The Railroad Museum at Ardenwood

August 2025 Update

Since acquiring the locomotive many people have asked about the "Agematsu" stack on the Kiso. The locomotive was originally built with a Rushton Improved stack from the factory, and was later modified at the Agematsu shops with additional spark arresting capabilities. The stack base as pictured is the original casting from Baldwin which we have seperated from the "Agematsu" stack.
To require us to meet with the local fire safety standards the locomotive will be converted to oil burning. What this means is we will be moving forward with a straight stack, we have mocked up a pipe as pictured to get a visual on how it will look.
The Agematsu stack was found to have deficiencies in drafting capabilities as the ash catch at the bottom of the stack had no way to be emptied. We had also discovered a cut inside of the stack that actually completely bypassed the spark arresting portion.
In the future the goal would be a replica "Agematsu" stack that can either slide over or bolt-in for events, very much like Sierra 3 at Railtown 1897.
The plan for the original stack will be to put it on display with a section of rail acquired from Agematsu to be used as a interpretive display on the Japanese forest railways, the Agematsu Shops, and a short history on how railroads modified locomotive stacks to suit thier operational needs, such as South Pacific Coast and thier "Corporate Stack" design.

Citation

"August 2025 Update", Kiso No. 9 Restoration Updates, The Railroad Museum at Ardenwood, accessed November 4, 2025, http://museum.spcrrtesttestsite1234567.org/exhibits/show/kiso_restoration/august-2025-update.