Tensiometer monitors contaminant levels in the vadose zone

Article Abstract:

Researchers at the Energy Dept's (DOE) National Engineering and Environmental Laboratory have installed monitoring equipment at the DOE's Savannah River Site to monitor surface water movement through a subsurface region called the vadose zone. The researchers hope to identify where and how fast water is moving before it mixes with groundwater at the water table. The scientists are using highly sophisticated tensiometers buried 12-25 ft below the earth's surface to measure soil water content and soil tension. Knowing how water and its accompanying chemicals interact with the vadose zone will help them to determine how many contaminants will eventually end up in the water supply.

South Carolina, Water Resources-State, Water resources

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Fire and flooding in Los Alamos: pipe ramming provides a solution

Article Abstract:

The city of Los Alamos, NM, faced the threat of massive flooding after the Cerro Grande fire razed more than 47,650 acres of forest lands. The local communities and the Los Alamos National Laboratory banded together to help prevent another potential disaster. A 250-ft length of 36" steel drainage casing was installed under a roadway near the laboratory. Boring contractor DH Underground selected the Grundoram Pipe Ramming System from TT Technologies for the trenchless boring work due to difficult soil conditions at the site.

All Other Heavy Construction, Nonmanufacturing technology, New Mexico, Flood Control Construction, Flood control, Waterway construction

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Shake, rattle & roll

Article Abstract:

The Marin County, CA, Municipal Water District (MMWD) successfully replaced a 2,200-ft, 72-year-old, 12-inch, cast-iron, water main line using pipe busrsting technology. This technology was selected over conventional trench-and-replace technology and an option to re-route the line because of problems with encroachments. Pipe bursting proved to be ideal because of its installation capabilities and cost factor. Using this technology, the MMWD was able to save about $110,000 over the closest comparably priced option.

California, Water Resources-Local

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