AFE, Series II, Number 18859, Volta, Montana, October 24, 1921, Retire Portage Depot. Located in folder 'Portage'. Other subject categories: Depot. Initial cataloger's disposition code: S, AFE Page 1 only

AFE, Series II, Number 17462, Volta, Montana, May 12, 1921, Remove G.F. Power Spur. Located in folder 'Portage'. Other subject categories: Track. Initial cataloger's disposition code: M, AFE Sheet page 1, with map or other paper

AFE, Series I, Number 15573, Volta, Montana, March 23, 1905, Spur Track. Located in folder 'Portage'. Other subject categories: Track. Initial cataloger's disposition code: X, AFE itself not found but referenced in other documents