C.R.S. § 43-1-1311

(1) Before any railroad tracks are removed from abandoned railroad rights-of-way in Colorado, if a proper legal description is not available, the person or entity removing the railroad tracks shall cause a field survey of the centerline of such railroad tracks to be made by a professional land surveyor, if title to any land references such railroad tracks. The professional land surveyor shall deposit a survey plat in accordance with section 38-50-101 , C.R.S., showing the following: (a) Field-measured dimensions of the centerline of the railroad tracks; and (b) Field-measured bearing and distance ties to public land survey monument corners so that no point on said abandoned railroad rights-of-way is further than two miles from a public land survey monument corner.