BURNS, Erick, Oregon Water Science Center, U.S. Geological Survey, 2130 SW 5th Avenue, Portland, OR 97201, eburns@usgs.gov, WILLIAMS, Colin F., U.S. Geological Survey, MS 973, 345 Middlefield Road, Menlo Park, CA 94025, INGEBRITSEN, Steven E., US Geol Survey, 345 Middlefield Road, Menlo Park, CA 94025, and VOSS, Clifford I., U.S. Geological Survey, Menlo Park, CA 94025