1. Prof. of Civil Engrg., Utah State Univ., Logan, Utah
2. Asst. Prof., Agricultural Engrg. Dept., Colorado State Univ., Fort Collins, Colorado; formerly Research Project Engr., Utah Water Research Lab., Utah State Univ., Logan, Utah
3. Grad. Res. Asst., Civil Engrg. Dept., Utah State Univ., Logan, Utah