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 nails.
Links
Womack & Associates
Specializing in engineering geology and geotechnical engineering in Idaho, Montana and Wyoming. Visit Womack & Associates
Links
Geokon, Inc.
Geokon, Inc. manufacturers a full range of high-quality geotechnical instrumentation suitable for monitoring the safety and stability of a variety of civil and mining structures. Visit Geokon, Inc.
Links
Hatch Mott MacDonald
A full service engineering firm with much experience in tunneling. Visit Hatch Mott MacDonald