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

Great Northern Blueprint Number X15-301 Sheet25, Great Northern Converter Substation - Switch Board Channels for Boards in Great Northern and Puget Sound Power and Light Company Substations, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 13, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 14, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 16, Great Northern Converter Substation- List of Conduits and Conductors, 1928. Other subject categories: Drawing