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The District of Columbia Water and Sewer Authority (DC Water) Board of Directors has approved the Authority's largest contract to date, for the design and construction of a storage and conveyance tunnel as part of the Clean Rivers Project.

A study by Duke University researchers has found high levels of leaked methane in well water collected near shale-gas drilling and hydrofracking sites.

Products from MALA GeoScience, Sensors & Software, Heath Consultants, Sensit Technologies, Radiodetection, Pipehorn Utility, McLaughlin, Vivax-Metrotech, SubSurface Instruments, Ditch Witch and Schonstedt Instrument.

Pipe bursting is a method of pipe replacement that involves three main forces that must be overcome to accomplish installing a new pipe. A basic understanding of these three forces is required for anyone involved in a pipe bursting project from conception, to design, through final construction. A more detailed level of understanding of the effects of varying ground conditions (geotechnical data) is essential to the success of a project by the senior team members including engineer, owner, contractor and field crews.

Many involved in various construction markets continue to search for signs that the recession is truly nearing an end and better times are close at hand.

The nation’s failing sewer collection system infrastructure encompasses main pipelines, lateral sewers and manholes. There exist over 20 million manholes in the U.S. of which over four million are older than 50 years and over five million are 30 to 50 years old.

McElroy, the pipe fusion experts, recently introduced the MegaMc PolyHorse.

The search for the cause of the San Bruno gas pipeline explosion in 2009 that killed eight people has taken a new twist. On June 9, the California Public Utilities Commission issued a report from their hand-picked Independent Review Panel. This was a group the CPUC assembled ostensibly to get to the bottom of the San Bruno explosion.

One might think all would be quiet now that the “dust” is beginning to settle on interim Tier 4 and Final Tier 4 doesn’t take effect for most off-road equipment until the 2013 – 2015 timeframe, depending on horsepower.

Advertisers from the print edition of Underground Construction, July 2011, Vol. 66 No. 7.

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