This pedestrian and bicycle underpass was constructed in 1987. The warning on the sign couldn't be more accurate! It read: "CAUTION - Area subject to flash flooding. Do not take shelter here."
This tunnel under the tracks flooded along with everything else around Boulder creek when the water levels rose by six feet in just over 24 hours. Although still in this picture, at its peek, Boulder Creek was flowing with a current of over 5000 cubic feet per second. By comparison, the norm is around 20 cubic feet per second.