Partially affiliated with the Geoengineer.org website, this Yahoo! Group has over 900 members that submit geotechnical questions for the entire membership to respond on.
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Penetradar Ground Penetrating Radar Systems
RIS Ground Penetrating Radar (GPR) Systems can accurately and nondestructively “see” through solid pavement materials, such as asphalt, concrete and soil to detect subsurface objects and determine the condition and thickness of the material examined. […]
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QuakeWrap, Inc.
QuakeWrap, Inc. is a leading designer, supplier and installer of innovative fiber-reinforced polymer (FRP) products for the repair and strengthening of structures. Visit QuakeWrap, Inc.
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AIS Construction
Slope stabilization, rockfall mitigation, drilling, soil nails, caissons and limited access drilling. They have a number of walking excavators or spiders to get at some pretty hairy areas. Visit AIS Construction