I decided to start a new post instead of hijacking the one below on the highway crossing. While looking at the val map sheet I noticed three different locations for the state line. Part of the never ending dispute of the boundary between NM and CO. The Bureau of public roads shows the state line about 1300' feet further north in 1902 as compared to the dominant line on the map. Then in 1923 they mark it as 1400' south of the dominant line. So it is somewhere in there within a half mile or so!
Dave