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 Railway Historical Society Blueprint Collection JSBP3131, Leavenworth, Washington, undated. Map.

Great Northern Blueprint Number 1633-4-1, map of Powerhouse, Dams, Conduits and Transmission Line, Leavenworth to Cascade Tunnel, 1923 REV 1934. Other subject categories: Right of Way and Track Map

Great Northern Blueprint Number 1333-4-5, Comparative Map and Condensed Profile of Present and Chumstick Revision Leavenworth to Winton, 1925. Other subject categories: Right of Way and Track Map

Great Northern Blueprint Number 1333-6-1, map of Location "L 2" Leavenworth to Winton, Stations 287 to 727, 1925. Other subject categories: Right of Way and Track Map