Great Northern Blueprint Number C-40-5, map of Pacific Extension East of Willamette through the Cascade Tunnel, 1894. Other subject categories: Right of Way and Track Map

Great Northern Blueprint Number 1333-9-4, Great Northern New Cascade Tunnel Section Looking East, 1926. Other subject categories: Drawing

Great Northern Blueprint Number 1333-9-7, Great Northern Proposed Section of the New Cascade Tunnel, 1926. Other subject categories: Drawing

Great Northern Blueprint Number 1333-9-6, Great Northern New Cascade Tunnel Cross Sections, 1926. Other subject categories: Drawing

Great Northern Blueprint Number 1333-9-5, Great Northern Details of Trolley Suports in the New Cascade Tunnel, 1926. Other subject categories: Drawing

Great Northern Technical Drawing 1219-25-16, 1 in 7 Frog, Material Track, 1898. Other subject categories: Drawing

Great Northern Technical Drawing 1219-25-15, Frog Liners, Material Track, 1898. Other subject categories: Drawing

Great Northern Technical Drawing 1219-25-17, Plan of Split Switch, Material Track, 1893. Other subject categories: Drawing

Great Northern Blueprint Number 1191-18-1, map of Proposed Change of Grade Cascade Tunnel to False Summit, 1907. Other subject categories: Right of Way and Track Map

Great Northern Blueprint Number 1233-31-1, map of Proposed Change of Grade Cascade Tunnel to Merrit, 1906. Other subject categories: Right of Way and Track Map