Great Northern Blueprint Number X17-301-7, Great Northern Cascade Electrification - Details of Special Structures for Entrance of 44 KV Lines 1 and 2 West to Converter Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X17-303-2 , Great Northern Cascade Electrification - Details of Trolley Structures and Pull-Off Poles at Appleyard, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 9, Great Northern Concerter Substation - Machine Floor Conduit Layout Plan, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-302-2, Great Northern Converter Substation - 11.5 and 44 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-1, Great Northern Converter Substation - 110 KV Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 37, Great Northern Converter Substation - Air Compressor Foundation Plan and Section, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-5, Great Northern Converter Substation - Conduit Plan, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 10, Great Northern Converter Substation - Details of Conduits to Wall Boxcar and Switchboard, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 30, Great Northern Converter Substation - Ground Connections in Building Plan and Details, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-302-6, Great Northern Converter Substation - Plan and Evevation, 1928. Other subject categories: Drawing