Great Northern Blueprint Number X15-301 Sheet39, Great Northern Converter Substation-Switch Board and Exciter Field Rheostat Arrangement, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-302-7, Great Northern Convertyer Substation - Sections and List of Material, 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

Great Northern Blueprint Number X15-301 Sheet 28, Great Northern Converter Substation - Apparatus Arrangement in Basement Plan and Section, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet8, Great Northern Converter Substation - Basement and Machine Pit Conduit Layout Plan and Sections, 1928. Other subject categories: Drawing