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

Great Northern Blueprint Number X15-301 Sheet3, Great Northern Converter Substation - Typical Indoor Oil Circuit Breaker Arrangement, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 6, Great Northern Converter Substation - Arrangement of Apparatus on Switchboard Panels, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet1 , Great Northern Converter Substation - One Line Diagram, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X15-301 Sheet 5, Great Northern Converter Substation - Switchboard Wiring Board at Puget Sound Power and Light Company Station, 1927. Other subject categories: Drawing

Great Northern Blueprint Number X17-303-4, Great Northern Cascade Electrification - Details of Electrification on East End of Appleyard Tracks, 1928. Other subject categories: Drawing