Great Northern Railway Historical Society Blueprint Collection JSBP1273, Duluth, Minnesota, 1898. Duluth Terminal Trestle. General Plan From Bent 289 to Bent 330. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1275, Duluth, Minnesota, 1902. Northern Pacific Railroad Blueprint Number H.1548, Proposed Track. South End of Yard- Rice's Point. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1277, Duluth, Minnesota, 1905. Chicago, St. Paul, Minneapolis and Omaha Railway Blueprint, Chicago, St. Paul, Minneapolis and Omaha Railway. Proposed New Track at Duluth. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1282, Duluth, Minnesota, 1917. Repair to Center Fender. Duluth - Superior Bridge. Authorization for Expenditure 3086. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1283, Duluth, Minnesota, 1917. Duluth-Superior Bridge. East End of Draw Rest. Authorization for Expenditure 3086. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1285, Duluth, Minnesota, 1923. Northern Pacific Railroad Blueprint Number Sheet 1 AND 2, Np Field Completion Report. Viaduct at 9th Avenue West. Authorization for Expenditure 1664-23. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1286, Duluth, Minnesota, 1923. Great Northern Blueprint Number SKETCH # 235.03, Ninth Avenue Viaduct. Sketch Showing Jct of Timber Ramp and Concrete Roadway. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1287, Duluth, Minnesota, 1923. Great Northern Blueprint Number 235-4, Viaduct at 9th Avenue West. General Arrangement of Viaduct. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1288, Duluth, Minnesota, 1923. Great Northern Blueprint Number 235-6, Viaduct at 9th Avenue West. Detail of Girder Supports and Columns for Viaduct. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Railway Historical Society Blueprint Collection JSBP1289, Duluth, Minnesota, 1923. Great Northern Blueprint Number 235-7, Viaduct at 9th Avenue West. Wind Bracing Details. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.