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 Sheet36, Great Northern Converter Substation-Switch Board Spacing Panel, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X17-300-8, Great Northern Cascade Electrification - Puget Sound Power and Light Company 2300V. Line Crossing Main Line and Track 14 in Appleyard, 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 X15-302-3, Great Northern Converter Substation - 11.5 and 44 KV Outdoor Substation, 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 X15-301 Sheet 28, Great Northern Converter Substation - Apparatus Arrangement in Basement 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 Sheet24, Great Northern Converter Substation - Manhole and Duct Run Location Plan and Conduit Arrangement in Manhole Number 1, 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