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

Great Northern Blueprint Number X15-301 Sheet21, Great Northern Converter Substation-Foundation Plan for 110 KV Oil Circuit Breaker at Puget Sound Power and Light Company Outdoor Substation, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet31, Great Northern Converter Substation-Steel Details, 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