Great Northern Railway Historical Society Blueprint Collection JSBP8720, Walton, Montana, undated. Snowshed # 12. Cone Culverts. Authorization for Expenditure 38709. Interstate Commerce Commission Account Number 14, Snow and Sand Fences and Snowsheds. Other ICC account descriptions: ICC Account Number 13, Snow Shed.

Great Northern Railway Historical Society Blueprint Collection JSBP8710, Walton, Montana, 1938. Great Northern Blueprint Number 177-76-6, Culvert Number 119. General Plan. Authorization for Expenditure 52525. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Culvert.

Great Northern Railway Historical Society Blueprint Collection JSBP8709, Walton, Montana, 1929. Great Northern Blueprint Number 10.1118, Snowshed # 12. Proposed 3 X 3 Concrete Drain. Interstate Commerce Commission Account Number 14, Snow and Sand Fences and Snowsheds. Other ICC account descriptions: ICC Account Number 13, Snow Shed.

Great Northern Railway Historical Society Blueprint Collection JSBP8708, Walton, Montana, 1929. Snowshed # 12. Alignment of Track. Authorization for Expenditure 38709. Interstate Commerce Commission Account Number 14, Snow and Sand Fences and Snowsheds. Other ICC account descriptions: ICC Account Number 13, Snow Shed.

Great Northern Railway Historical Society Blueprint Collection JSBP8707, Walton, Montana, 1928. Snowshed # 12. Specifications for Double Track Combined Timber and Concrete Snowshed. Interstate Commerce Commission Account Number 14, Snow and Sand Fences and Snowsheds. Other ICC account descriptions: ICC Account Number 13, Snow Shed.

Great Northern Railway Historical Society Blueprint Collection JSBP8706, Walton, Montana, 1928. Great Northern Blueprint Number 10.1118, Snowshed # 12. Pedestal for Outside Posts. Authorization for Expenditure 35646. Interstate Commerce Commission Account Number 14, Snow and Sand Fences and Snowsheds. Other ICC account descriptions: ICC Account Number 13, Snow Shed.