Features

Cara Hlad, AIA, LEED AP

Tunneling is an extreme and energy-intensive process that can have significant site and cost bearing on a project and community. Traditional tunneling requires the use of massive equipment and machinery, and substantial consumption of materials and natural resources.

The Swagelining technique has been around for over 30 years, developed in the late 1970s by British Gas and United Utilities in order to address the problem of failing pipeline systems.

Jeff Griffin, Senior Editor

The sanitary sewer rehabilitation industry -- especially organizations involved in cured-in-place-pipe (CIPP) lining -- are evaluating potential ramifications, if any, of the designation last month of styrene as a “reasonably anticipated carcinogen.”

Jeff Griffin, Senior Editor

The city of Fort Worth, TX, sanitary sewer system serves 22 communities with a total population of more than 900,000. It contains approximately 3,011 miles of underground pipe infrastructure that collects and carries an average of 108.5 million gallons a day to the Village Creek Water Reclamation Facility.

It’s a puzzle with a lot of pieces that can be challenging to put together into a crystal clear picture: To rent, buy or rent and then convert that rental into a purchase?

Angus W. Stocking, L.S.

The Sabine River Authority (SRA) of Texas was created in 1949 to equitably distribute the waters of the Sabine River and its tributaries. As part of this distribution, “We provide surface water to eleven industrial customers, such as Conoco and Louisiana Pigment, for cooling and processing,” says SRA Facility Manager Mike Carr.

Jeff Griffin, Senior Editor

Mesa Verde National Park is located in the relatively isolated southwestern corner of Colorado, near Durango. More than 1,000 years ago, the area was home to Pueblo-dwelling people, and the park contains more than 4,000 archeological sites -- including 600 cliff dwellings -- which are among the most notable and best preserved in the United States.

Robert Carpenter, Editor

While the overall market recovery for horizontal directional drilling appears to be improving at the mid-year point of 2011, many contractors are still struggling with sluggish economic conditions.

Jeff Griffin, Senior Editor

H&H Enterprises is a HDD contractor specializing in rock with 15 years of experience working primarily in the Northeastern United States.

Jeff Griffin, Senior Editor

At one time or another, rock is a challenge to most contractors who do horizontal directional drilling (HDD). The degree of difficulty and the efficiency with which rock is penetrated involves many factors, including the size of the drill unit, method of drilling, downhole tools and the experience and capability of drilling crews.

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