An eastbound Rio Grande manifest clears one of the two tunnels built to bypass the mudslide at Thistle, Utah, which is hidden behind the mountain that now hosts the tunnels. At the extreme left, from left to right, are pre-1983 Rio Grande right of way, the Spanish Fork, and the original alignment of US Route 6. For a time in 1983, the lowest elevations in the scene were covered by the so-called “Lake Thistle”, which was created by rising floodwaters due to the blockage of the flow of Spanish Fork.
