1. Department of Civil, Environmental, and Architectural Engineering, University of Colorado at Boulder, Campus Box 428, Boulder, CO 80309-0428.
2. United Contractors, Inc., 5562 Pendergrass Boulevard, Great Falls, SC 29055.
3. Kiewit Corporation, 1000 Kiewit Plaza, Omaha, NE 68131.
4. North Carolina Department of Transportation, P.O. Box 25201, Raleigh, NC 27611.
5. Federal Highway Administration, HIPA-30, Room 3134, 400 Seventh Street, Southwest, Washington, DC 20590.