Not long after, as it turns out - it's gone, and the road is re-aligned, by 1980. So, that work was ostensibly done in the late 70s.
Turns out also that the road used to curve right here, which explains the pin position.
This was listed in Hyde's 1976 inventory but is gone by the time of the 1992 NBI, so its replacement with the street-level railroad crossing has to be somewhere between the two.
Allegedly reused at a boat ramp on Bond Street.
https://www.abandonedrails.com/niles-michigan
The story sounds fishy.