Full-service geotechnical contractors and ground improvement specialists. Based in St. Louis, MO.
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Geo Photo Album
A very nice collection of photos of geotechnical failures, geotechnical construction projects and methods. Put together by Ross W. Boulanger at UC Davis and James Michael Duncan from Virginia Tech, Blacksburg. Visit Geo Photo Album

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TXDOT Geotechnical Manual
The purpose of this manual is to guide TXDOT districts in geotechnical investigation and design for project development. Visit TXDOT Geotechnical Manual

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Terracon
With local expertise backed by national resources, Terracon provides geotechnical, environmental, construction materials and facilities services nationwide with more than 95 offices and 3,000 employees. Visit Terracon