Great Northern Blueprint Number X15-301 Sheet 19, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet33, Great Northern Converter Substation- List of Material, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet34, Great Northern Converter Substation- List of Material, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet36, Great Northern Converter Substation-Switch Board Spacing Panel, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X17-303-1, Great Northern Cascade Electrification - Details of Running and Yard Tracks Number 11, 12 and 13 West End of Appleyard, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet22, Great Northern Converter Substation - Balcony Conduit Layout Plan and Elevations, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-302-4, Great Northern Converter Substation - 11.5 and 44 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-3, Great Northern Converter Substation - 110 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-4, Great Northern Converter Substation - 110 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet29, Great Northern Converter Substation - 60 Volt Bus Room Arrangement Plan and Section, 1928. Other subject categories: Drawing