Four years after a landslide at Thistle, Utah blocked the Spanish Fork River with thousands of tons of earth, wiping out the town, a westbound Rio Grande manifest passes through the area. In this view, the river can be seen with the original D&RGW roadbed to its right and the pre-mudslide US Route 6 to its field blocking the canyon in the background. left, and the huge debris pile filling the canyon in the background. Within four months, Rio Grande engineers designed and built twin tunnels and a new alignment, and the Route 6 relocation can be seen in the extreme upper left.