dollars of work. the objective was to shore up the side and to allow control of the channel so the channel didn't move anywhere else. part of it also that it would essentially catch small land slides sluffing off one side or the other that would come through. that was in 2006. we have been through, good grief, a lot of floods, and that community felt safe because of that mitigation effort. it was extensive. people knew this was a landslide prone area. sometimes big events just happen. sometimes large events that nobody sees happen. and this event happened, and i want to find out why. >> so to you, i will pose that question, david montgomery, why if they had this mitigation after the 2006 slide, why now? >> well, the proximate cause was the rainfall. the mitigation efforts were to