Most snow bridges are formed in deep-shaded parts of incised channels on the mountain. These dams then may be dislocated or breached, thereby creating surges of water and debris that may cause debris flows downstream. Entrance of snow tunnel in incised channel formed by melting or scouring action of streamflow. Location is about 3 km upstream from Mud Creek Dam. Slope is 0.073.
Flow is from right to left.
Photograph taken July 1984. Debris flows attributed to the effects of warm air temperatures have occurred on Mount Shasta a number of times. The Redding Searchlite and the Mount Shasta Herald reported that tons of muddy water flowed down Mud Creek during July 1977. Convective precipitation in the vicinity of the mountain is especially common during June, July, and August. U.S. Highway 97 following rainstorm on August 28, 1935.