Great Northern Railway Historical Society Blueprint Collection JSBP10476, Minnesota, 1952. Great Northern Blueprint Number EC.2068, Signal Maintainer's and Section Tool House. Floor Plan. Authorization for Expenditure 72903. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP1050, Crookston, Minnesota, 1925. Great Northern Blueprint Number 102.09.05, Interlocking. (Redland) - Automatic. Authorization for Expenditure 30087. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP1113, Dakota Division, 1902. Signal Located Between Track Or On Building. Sections. Authorization for Expenditure 7003. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Train Order Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP1700, Glyndon, Minnesota, 1909. Great Northern Blueprint Number B.10.52, Interlocking. Automatic. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP3263, Merriam, Minnesota, 1944. Great Northern Blueprint Number TOS - 5, Train Order Signal. Elevation. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP3944, Morris, Minnesota, 1917. Great Northern Blueprint Number 146-4, Crossing Alarm Bell. At 5, 6 and 7th Streets. Authorization for Expenditure 7645. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP3993, New Prague, Minnesota, 1943. Great Northern Blueprint Number TOS - 1, Train Order Signal. Elevation. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP4211, Redland, Minnesota, 1912. Great Northern Blueprint Number 102-9-2, Crossing With N.P.Ry. Map, Wiring Diagram and Dog Chart. Authorization for Expenditure 8320. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP5605, Saint Paul, Minnesota, 1959. Great Northern Blueprint Number 9608.01, Proposed Signal and Communications Shop. (Jackson St) - Floor Plan. Authorization for Expenditure 91255. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.

Great Northern Railway Historical Society Blueprint Collection JSBP5606, Saint Paul, Minnesota, 1959. Great Northern Blueprint Number 8536.16, Proposed Signal and Communication Shop. (Jackson St) - Floor Plan. Authorization for Expenditure 91255. Interstate Commerce Commission Account Number 27, Signals and Interlockers. Other ICC account descriptions: ICC Account Number 27, Signal.