https://www.sdpb.org/blogs/arts-and-culture/the-border-monuments/ Miles 290-296
https://www.sdpb.org/blogs/arts-and-culture/the-border-monuments/
https://www.sdpb.org/blogs/arts-and-culture/the-border-monuments/
https://www.sdpb.org/blogs/arts-and-culture/the-border-monuments/
https://www.sdpb.org/blogs/arts-and-culture/the-border-monuments/
https://www.nytimes.com/2017/01/25/science/north-america-geographical-center-north-dakota.html
https://www.nytimes.com/2017/01/25/science/north-america-geographical-center-north-dakota.html
https://en.wikipedia.org/wiki/Burkle_addressing_system
North Dakota addressing system origin point
Best guess at location from air photo.
Very close to perfect location
Mile 8 North Dakota South Dakota boundary marker