D&RGW narrow gauge bridge built in the early 1960s by the Corps of Engineers to skirt a new reservoir they had just built at Arboles, Colorado. I think the bridge is still there, but the tracks were removed in late-1970.

http://www.jerryapp.com/pix1/ja-s051.jpg

Bridge is still there an now has a pedestrian deck on it. Crosses Navajo reservior under which lies the original D&RG ROW. I beleive all the larger bridges on the Chama-Durango line are still intact.