1. Assoc. Prof., Dept. of Civ. and Environmental Engrg., and Utah Water Research Lab., Utah State Univ., Logan, Utah
2. Research Economist, Utah Water Research Lab., Utah State Univ., Logan, Utah
3. Research Asst., Utah Water Research Lab., Utah State Univ., Logan, Utah
4. Research Assoc., Office of Vice Pres. for Research, Utah State Univ., Logan, Utah