Great Northern Blueprint Number 1206-10-3, Track Profile, Flathead Lake, Montana, Montana & Great Northern Flathead Lake Survey Station 0 to 500 South Line, 1902. Other subject categories: Profile

Great Northern Blueprint Number 1206-10-4, Track Profile, Flathead Lake, Montana, Montana & Great Northern Flathead Lake Survey South Line Station 480 to 770, 1902. Other subject categories: Profile

Great Northern Blueprint Number 1240-20-2, Track Profile, Flathead Lake, Montana, Montana & Great Northern Railway Flathead Lake South Line, 1902. Other subject categories: Profile

Great Northern Blueprint Number 1240-20-3, summary of Montana & Great Northern Railway Flathead Lake South Line, 1902. Other subject categories: Summary

Great Northern Blueprint Number 1240-20-1 , map of Montana & Great Northern Railway Flathead Lake South Line, 1902. Other subject categories: Right of Way and Track Map