Narrow Gauge Track Emerges

After 40+ years, a tangent section of narrow gauge track has emerged from the murky depths of Navajo Reservoir in northern New Mexico. The trackage was once part of the main line between Chama and Durango until the early 1960s, when the Bureau of Reclamation's Navajo Dam project forced relocation of the line around the future impoundment. The old track, repleat with ties and mud encrusted rails, was recently exposed by drought-induced low reservoir levels. I wonder what the date of the last train to ply those rails might be, and how many of the crew and cars of that last train survive today?