1. Lead Technical Analyst, GE Oil and Gas, Houston, TX 77041–8239; formerly, Engineer, Peritus International Inc., Houston, TX 77064-3319.
2. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136 (corresponding author).
3. Consultant, The Hills, TX 78738-1426.