Great Northern Blueprint Number 8116.1, Koyl System, Water Treatment Plant, Plans, 1918. Other subject categories: Drawing

Great Northern Blueprint Number 8116.4, Koyl System, Water Treatment Plant, Miscellaneous Details, 1918. Other subject categories: Drawing

Great Northern Blueprint Number 8116.3, Koyl System, Water Treatment Plant, Sections, 1918. Other subject categories: Drawing

Great Northern Blueprint Number 8116.2, Koyl System, Water Treatment Plant, Elevations, 1918. Other subject categories: Drawing

Great Northern Blueprint Number 3A.300.1, Great Northern Details of Framing for Mixing Machinery and Water Wheel, 1925. Other subject categories: Drawing

Great Northern Blueprint Number 6.300.3A, Great Northern Water Treatment Plant, Sludge Floor and Piping, 1925. Other subject categories: Drawing

Great Northern Blueprint Number 3A.800.1A, Great Northern Foundation Plan, 24' X 20 Water Treatment Plant, 1925. Other subject categories: Drawing

Great Northern Blueprint Number 3A.400.2, Great Northern Plan of Heating 24' X 20' Treating Plant, 1928. Other subject categories: Drawing

Great Northern Technical Drawing, General Foundation Details for Deep Well 1940. Other subject categories: Drawing

Great Northern Blueprint Number SKETCH 100, Great Northern Installing Boiler and Changing Piping in Depot, undated. Other subject categories: Drawing