Great Northern Blueprint Number 8116.8, Koyl System, Water Treatment Plant, Hoop Details, 1918. Other subject categories: Drawing

Great Northern Blueprint Number 1326-37-1, map of Sheyenne River Gravel Pit West of Heimdal, undated. Other subject categories: Right of Way and Track Map

Great Northern Blueprint Number 1326-37-1, map of Sheyenne River Gravel Pit West of Heimdal (blueprint), undated. Other subject categories: Right of Way and Track Map

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. Depot, One Story, with Platform. Interstate Commerce Commission Account Number 16, Station and Office Buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. Section House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. (2) Tool House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. Section House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. Bunk House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. Bunk House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .

Great Northern Railway Authorization for Expenditure (AFE), Heimdal, North Dakota, 1912. (2) Tool House . Interstate Commerce Commission Account Number 17, Roadway buildings. Series .