Allison M Pfeiffer, Western Washington University, Geology Department, Bellingham, WA, United States, Brian David Collins, University of Washington Seattle Campus, Seattle, WA, United States, Scott Wallace Anderson, USGS Washington Water Science Center, Tacoma, WA, United States, Erkan Istanbulluoglu, University of Washington Seattle Campus, Department of Civil & Environmental Engineering, Seattle, WA, United States and David Montgomery, University of Washington Seattle Campus, Earth and Space Sciences, Seattle, WA, United States