Geotextile manufacturer. In addition to the usual products for a company like this, they have a geotextile product deployed to combat areas. But what I really liked on their site was som cartoony schematic diagrams showing a French drain and trenches anchoring a separation geotextile on a slope before dumping riprap.
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DBM Contractors, Inc.
Highly respected specialty geotechnical contractor with tons of expertise in earth retaining structures, slope stabilization and ground improvement. Visit DBM Contractors, Inc.
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Arizona Geology
Blog of Lee Allison, Arizona State Geologist. Visit Arizona Geology
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Geotehnic Student
A group for geotechnical students in Iran Visit Geotehnic Student