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 X15-301 Sheet8, Great Northern Converter Substation - Basement and Machine Pit Conduit Layout Plan and Sections, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-7, Great Northern Converter Substation - Plan Elevation and Section, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-303-6, Great Northern Converter Substation - Plan, Elevation, Section and List of Material, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet26, Great Northern Converter Substation - Switch Cells 60 Volt Bus Room, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet35, Great Northern Converter Substation- Lighting Details, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet27, Great Northern Converter Substation-25 N O.C.B Cell in Basement, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 2, Great Northern Converter Substation - Station Wiring Diagram, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 4, Great Northern Converter Substation - Switchboard Wiring, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X17-300-4, Great Northern East Slope Electrification- Proposed 110 KV Line Crossing at Chehalis Street, 1927. Other subject categories: Drawing