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.
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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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Hatch Mott MacDonald
A full service engineering firm with much experience in tunneling. Visit Hatch Mott MacDonald
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Brierley Associates
Geotechnical and tunnel design consultant with offices in Colorado, New York, Texas and Massachusetts. Visit Brierley Associates