Great Northern Railway Historical Society Blueprint Collection JSBP1272, Dugdale, Minnesota, 1899. Proposed Interlocking. Map. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1274, Duluth, Minnesota, 1901. Sketch of Rice's Point Yard. Showing Tracks to Be Ballasted. Interstate Commerce Commission Account Number 11, Ballast. Other ICC account descriptions: ICC Account Number 11, Rail Line Ballast.

Great Northern Railway Historical Society Blueprint Collection JSBP1278, Duluth, Minnesota, 1906. Great Northern Blueprint Number A70.1, Duluth Map. Showing Interlocks for Minnesota and Wisconsin Draws and N.P. Junction. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1279, Duluth, Minnesota, 1908. Duluth, Superior & Western Railway Blueprint Number H.5227, Rail Section. Drilling for Splice Bars and Rail Bonds. Interstate Commerce Commission Account Number 12, Track Laying and Surfacing. Other ICC account descriptions: ICC Account Number 12, Rail Line.

Great Northern Railway Historical Society Blueprint Collection JSBP1281, Duluth, Minnesota, 1915. Great Northern Blueprint Number 110-6-1, Duluth Terminal Trestle. Interlocking and Signaling for Soo Connection With Duluth Terminal Trestle. Authorization for Expenditure 25058. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking and Signaling.

Great Northern Railway Historical Society Blueprint Collection JSBP1300, Duluth, Minnesota, 1926. Great Northern Blueprint Number 110-601, Duluth Terminal Trestle. Changes In Interlocking and Signaling for Soo With Duluth Terminal Trestle. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1377, Elbow Lake, Minnesota, undated. Great Northern Blueprint Number A.10.61, Crossing Signaling. Wiring Diagram. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1379, Elk River, Minnesota, 1908. Great Northern Blueprint Number A10.76, Elk River Interlocking. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1380, Elk River, Minnesota, 1908. Great Northern Blueprint Number A10.76, Elk River Interlocking. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Interlocking.

Great Northern Railway Historical Society Blueprint Collection JSBP1387, Elk River, Minnesota, undated. Crossing Alarm Bell. Situation Plan. Interstate Commerce Commission Account Number 15, Crossings and Signs. Other ICC account descriptions: ICC Account Number 14, Public Crossing.