Great Northern Railway Historical Society Blueprint Collection JSBP4902, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-222 Sheet 5, Converter Sub Station-110,000 V. Switch Structure. Disconnect Switch Support and Brackets. 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 JSBP4903, Skykomish, Washington, 1926. Great Northern Blueprint Number Sheet EET 26, Converter Substation. Plan of Hoisting Sling. 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 JSBP4904, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-218 Sheet, Converter Sub Station-110,000 V. Switch Structure. Anchor Bolts, etc. 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 JSBP4905, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-218 Sheet 3, Converter Sub Station-110,000 V. Switch Structure. Steel Work - Plan and Elevations. 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 JSBP4906, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-218 Sheet 4, Converter Sub Station-110,000 V. Switch Structure. Steel Work - Sections. 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 JSBP4907, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-222, Converter Sub Station-110,000 V. Switch Structure. Anchor Bolts, Etc. 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 JSBP4908, Skykomish, Washington, 1926. Great Northern Blueprint Number X10-217, Converter Substation. Oil Tank and Piping 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 JSBP4909, Skykomish, Washington, 1926. Transfer Care for Moving Transformers. Specifications. 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 JSBP4910, Skykomish, Washington, 1926. Great Northern Blueprint Number X.10.217, Converter Substation. Office Detail and Door Entrance. Interstate Commerce Commission Account Number 29, Power Plant Buildings. Other ICC account descriptions: ICC Account Number 29, Power Station.

Great Northern Railway Historical Society Blueprint Collection JSBP4911, Skykomish, Washington, undated. Feeder and Track Transformer Circuits. Schematic. Interstate Commerce Commission Account Number 30, Power Substation Buildings. Other ICC account descriptions: ICC Account Number 29, Substation.