Ice Dam Manderson Wyoming

All of these ice flow photos were taken off of the bridge at Manderson Wyoming.  Yesterday, this flow was about 20 miles upstream from here in Worland, WY where it caused flooding.  At first the ice was moving smoothly seen in the second photo from the bottom.  As the ice hit the pillars the bridge would shake. 

Within an hour, the ice went from moving smoothly to not moving at all (upper photos).  If you're wondering, the guy in the pickup is a Game and Fish officer that was caught in the quickly rising water and had to be towed out.  I have never seen anything like this.