Great Northern Blueprint Number X15-308-10, Great Northern Track Substation Temporary Structure, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X17-301-1, Great Northern Cascade Electrification - Air Section at Station 241+60 East Portal Cascade Tunnel, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-308-9, Great Northern Track Transformer Substation Outdoor Conduits and Material List, 1929. Other subject categories: Drawing

Great Northern Blueprint Number X15-308-11, Great Northern Track Transformer Substation Wiring Details, 1932. Other subject categories: Drawing