Great Northern Railway Historical Society Blueprint Collection JSBP2493, Hibbing, Minnesota, undated. Great Northern Blueprint Number 1088.01, Signal Layout. Interlocking Diagram. Authorization for Expenditure 11791. 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 JSBP2486, Hibbing, Minnesota, 1910. Plan of Ties for Crossing at Dale-Uno Mine Spur. Plan. Interstate Commerce Commission Account Number 8, Ties.

Great Northern Railway Historical Society Blueprint Collection JSBP2485, Hibbing, Minnesota, 1909. Great Northern Blueprint Number 1121-14, North Cypress Mine Spur Crossing. Plan Detail. Interstate Commerce Commission Account Number 9, Rails. Other ICC account descriptions: ICC Account Number 9, Crossing Frog.

Great Northern Railway Historical Society Blueprint Collection JSBP2484, Hibbing, Minnesota, 1908. Great Northern Blueprint Number 1121-14, Diagram of Double Cross-Over. North Cypress Mine Spur. Interstate Commerce Commission Account Number 9, Rails. Other ICC account descriptions: ICC Account Number 9, Rail.

Great Northern Railway Historical Society Blueprint Collection JSBP2483, Hibbing, Minnesota, 1907. Proposed Pile Bridge. On Buffalo and Susquehanna Mine Spur. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.