Great Northern Blueprint Number X15-300-6, Great Northern Cascade Electrification - R F Johnson and others Wire Crossing 4 Miles West of Depot, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 7, Great Northern Converter Substation - Arrangement Plan, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-2, Great Northern Converter Substation -110 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 12, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 15, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet18, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

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 X15-300-17, Great Northern Cascade Electrification - Farmers Telegraph and Telephone Company Crossings at Miller, Ninth and Fifth Streets, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X17-300-20, Great Northern Cascade Electrification - Power Line Crossing at Orondo Avenue, Skagit and Spokane Street, 1928. Other subject categories: Drawing