Specifying allowable leakage rates

August 1, 2011  |  Products

How to avoid specifying a disaster By Glenn T. Darilek and Daren L. Laine Introduction Allowable Leakage Rates or Action Leakage Rates (ALRs) are specified for installed geomembranes to quantify the maximum allowable liquid leakage. If the ALR is exceeded, corrective action must be taken to reduce t…
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Patch extrusion welding as a geomembrane failure mechanism

August 1, 2011  |  Case Studies

Geomembrane performance: Lessons learned—Part 2 By Garrett Q. Dutson Introduction This case history examines the geosynthetic construction, use, failure, and repair of an evaporation pond at an EnergySolutions facility in Clive, Utah. A high priority is placed on management of water that has c…
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Comparison of carbon footprints for various stormwater retention systems

August 1, 2011  |  Case Studies

Introduction Construction materials continue to be a major source of greenhouse gases (GHG), based on the fossil fuels used in their production. As the amount of greenhouse gases generated each year continues to increase, there is a conscious effort to provide alternatives with lower carbon footprin…
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Sustainability and the fiber-reinforced soil repair of a roadway embankment

August 1, 2011  |  Case Studies

By Garry Gregory From the Geosynthetics Research Institute’s 24th conference, 2011.The articles in this series encompass all types of geosynthetics and their applications viewed from the context of sustainability. Traditional solutions are compared with geosynthetic solutions from both cost and ca…
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A better way for the Beltway

August 1, 2011  |  Case Studies

By Alan Dinges Introduction Each day close to 50,000 motorists travel through the Telegraph Road interchange on the integral Interstate-95/495 Capital Beltway between Virginia and Maryland, south of Washington, D.C. In early 2008, extensive upgrades to the interchange began as part of a multi-year p…
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Another dam question

August 1, 2011  |  News

Editor’s Note: A follow-up to this question and answer, prompted by the article “Geomembrane sealing systems for dams,” came from a reader in India. Question From: Shivani Pal Geomembranes v/s concrete face in rock-fill dams? Please comment, sir, whether geomembrane can completely …
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Kwig, Alaska, article is popular with readers

August 1, 2011  |  News

Editor’s Note: “Tales from the tundra” prompted the following questions and comments. Question From: Reza RE: fill materials for cell web in Kwig? Dear Cory, This was a wonderful story! Are there any gravel materials for cell web filling? Also, did you use any nonwoven geotextile f…
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WHAT’S GOING ON HERE? What is that thing?

August 1, 2011  |  Products

Using fabrics called geotextiles By Josh Wengler, The Wayne Independent HONESDALE, PA. — Driving on Route 191 just north of Honesdale, one can’t help but notice the pipeline workers tearing up a huge swath of the hillside on the east side of the road across from the entrance to the Wayne…
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IECA calls for nominations

July 27, 2011  |  News

The International Erosion Control Association (IECA) is currently calling for nominations for its Board of Directors, according to a July 27 press release. New terms for this Board begin in February 2012. The IECA Board of Directors includes nine members, each serving a three-year term. The election…
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FEMA expert offering free seminars to road crews

July 22, 2011  |  News

Gravel roads that turn into mud in springtime are part of Vermont’s lore. But a federal road expert is hoping to change that. Federal Emergency Management Agency (FEMA) mitigation engineer Richard Downer is offering workshops throughout Vermont to teach state and local road crews how to use hi…
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