This paper presents how geotextiles were used to repair three dams in Texas, Arizona, and Colorado. The geotextile performs different functions in each of these three dams, all of which are dry structures. By Benjamin C. Doerge, Trent Street, John Chua, Rex Stambaugh, and James McHenry. [Source: Geosynthetics Magazine. Image: Geosynthetics Magazine]
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CNN Highlights Dams in Danger
How to Find the One in Your Backyard
Washington, D.C. [Editor] Thursday, October 4, 2007 by American Rivers (Contact info at bottom of press release) [/Editor] — More than ten thousand dams across America could become killers if they fail and 1,333 of those dams are considered structurally deficient. Today, on CNN’s American Morning, an alarming story by Sean Callebs showed the dire state of our nation’s dams. In one instance in Ohio, hundreds of people live right on top of a dam that has been deemed structurally deficient by engineers.
ASTM Updates for March, 2012
This post contains a list of new, revised and otherwise updated ASTM standards that pertain to the geotechnical engineering, materials testing and related fields. Standard C39/C39M for testing the compressive strength of concrete cyllinders was updated, as was C42/42m for obtaining and testing drilled cores and sawed beams of concrete. The month of March also saw several geosynthetic standards being updated or added, including new standards for selecting the test method for geomembrane seams, and for testing the flexural rigidity of geogrids and other geosynthetics. There are also a few updated standards related to asphalt mix design and sampling of asphalt. Click through for updated ASTM Standards relating to geoprofessionals.