Great Northern Railway Historical Society Blueprint Collection JSBP3125, Leavenworth, Washington, 1937. Great Northern Blueprint Number X14-308-4, Extension of Transformer Substation. Steel Details. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Railway Historical Society Blueprint Collection JSBP3126, Leavenworth, Washington, 1937. Great Northern Blueprint Number X14-308-2, Extension of Transformer Substation. Foundation Plan and Outdoor Conduits. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Railway Historical Society Blueprint Collection JSBP3127, Leavenworth, Washington, 1937. Great Northern Blueprint Number X14-308-3, Extension of Transformer Substation. Arrangement of Apparatus. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Railway Historical Society Blueprint Collection JSBP3128, Leavenworth, Washington, 1937. Great Northern Blueprint Number X14-308-6, Extension of Transformer Substation. Switchboard. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Railway Historical Society Blueprint Collection JSBP3129, Leavenworth, Washington, 1937. Great Northern Blueprint Number X14-308-1, Extension of Transformer Substation. General Location Plan. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Railway Historical Society Blueprint Collection JSBP3130, Leavenworth, Washington, 1938. Great Northern Blueprint Number X14-308-5, Extension of Transformer Substation. Wiring Diagrams. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.

Great Northern Blueprint Number X17-301-6, Great Northern Cascade Electrification - Details of Special Structure Number 677, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-300-9, Great Northern Cascade Electrification - Farmers Telegraph and Telephone Company Cable Crossing East of New Depot, 1928. Other subject categories: Drawing

Great Northern Blueprint Number X15-300-11, Great Northern Cascade Electrification - Puget Sound Power and Light Company Line Crossing 1 Mile East of Depot, 1928. Other subject categories: Drawing