Great Northern Railway Historical Society Blueprint Collection JSBP2463, Helena, Montana, 1919. Skylights and Ventilators. In Helena Depot. Authorization for Expenditure 9882. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Station Facilities.

Great Northern Railway Historical Society Blueprint Collection JSBP2462, Helena, Montana, 1919. Skylights and Ventilators. In Helena Depot. Authorization for Expenditure 9882. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Station Facilities.

Great Northern Railway Historical Society Blueprint Collection JSBP2461, Helena, Montana, 1913. Great Northern Blueprint Number 7561-22, Passenger Station. Electric Lighting Plan and Details. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP2460, Helena, Montana, 1912. Passenger Station. Sections. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Station Facilities.

Great Northern Railway Historical Society Blueprint Collection JSBP2459, Helena, Montana, 1912. Great Northern Blueprint Number 7561-7, Passenger Station. Sections. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP2458, Helena, Montana, 1912. Great Northern Blueprint Number 7561-5, Passenger Station. Front and Side Elevations. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP2457, Helena, Montana, 1912. Great Northern Blueprint Number 7561-4, Passenger Station. Main Floor and Roof Plan. Authorization for Expenditure 80941. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP2456, Helena, Montana, 1912. Great Northern Blueprint Number 7561-3, Passenger Station. Track Floor Plan and Stair Details. Authorization for Expenditure 80941. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Depot.

Great Northern Railway Historical Society Blueprint Collection JSBP2455, Helena, Montana, 1902. Stockyard. Three Pen - Floor Plan. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Other ICC account descriptions: ICC Account Number 16, Stockyard.

Great Northern Railway Authorization for Expenditure (AFE), Helena, Montana, 1913. Depot . Interstate Commerce Commission Account Number 16, Station and Office Buildings. Series .