FHWA Directory of State Departments of Transportation

The blog of Harold W. Asmis, a retired geophysicist and engineer from the Ontario Power Generation Company. His career experience includes tunnel analysis, regional geologic mapping, and earthquake engineering in support of nuclear power plant […]

DYWIDAG-Systems International (DSI) is America’s leading manufacturer & supplier of specialist ground support products to the underground coal & metalliferous mining sectors. They also are one of the suppliers of hollow core or self-drilling soil […]

Development, manufacture, and sale of the Wildcat dynamic cone penetrometer, which economically and continuously measures strength, CBR, and N-values of soils to 25-foot depths. Visit Triggs Technologies