1. a CH2M HILL , 2020 S. W. 4th Ave., Portland, OR, 97201
2. b Dept. of Civ. and Env. Engrg. , Washington State Univ. , Pullman, WA, 99164, U.S.A.
3. c Northwest Hydr. Consult. , 22017 70th Ave. S., Kent, WA, 98032
4. d International Development Projects , Washington State University , College of Engineering and Architecture, Pullman, WA, 99164, U.S.A.