open access 20-ton HE Cratering Experiments in Desert Alluvium: Final Report, May 1962 Description: From abstract and summary: Project Stagecoach consisted of the detonation of three 40,000-pound charges. Blocks of cast TNT were stacked to resemble a sphere and, the whole center-detonated. Date: March 1960 Creator: Vortman, Luke J. & MacDougall, H. R.