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ECTC’s installation guidelines for sediment retention roll
August 2nd, 2011
The Erosion Control Technology Council (ECTC) has published a “General Usage and Installation Guidelines for Sediment Retention Fiber Roll (SRFR),” it announced in a July 29 press release. The guidelines are the result of consensus among SRFR manufacturers and are designed to address the needs of engineers, designers, and other end-users of these products, the […]
Michael Heibaum named 2012–13 Mercer Lecturer
August 1st, 2011
The Mercer Lecture selection committee, chaired by Prof. Fumio Tatsuoka, announced online July 27 that Dr.-Ing. Michael Heibaum has been appointed as the lecturer for the 2012–2013 Mercer Lecture Series. The announcement said that he will deliver his presentation, “Geosynthetics for waterways and flood protection structures—controlling the interaction of water and soil” at selected conferences […]
WHAT’S GOING ON HERE? What is that thing?
August 1st, 2011
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 County Fairgrounds. It’s an […]
Septic system features geotextiles
August 1st, 2011
The Enviro-Septic System was invented in the small northern New Hampshire town of Whitefield by Dave Presby. Presby, president of Presby Environmental, learned a long time ago that if he built an eco-system that cleaned the effluent before it got to the soil, the results were markedly better. Geotextiles certainly helped! To quote the technical […]
GSI’s second Inspector Certification Program
August 1st, 2011
By Bob Koerner In 2006, GSI launched its first inspector certification program for the installation of geosynthetics at waste containment facilities. To be a successful candidate, the individual must provide an application verifying six months of related experience, an employer’s recommendation, and completion of a multiple-choice examination with a 70% passing grade. To date, 422 […]
GMA government relations update
August 1st, 2011
Here is an update on issues GMA will be advocating during the Sept. 13–14 Lobby Day in D.C. By Andrew Aho Geosynthetic materials as separators and interlayers in roadways study GMA’s request for congressional funding of a cost-benefit study of geosynthetics as separators and interlayers in roads continues to gain momentum. We are currently pursuing […]
Sign up now for geosynthetics short courses
August 1st, 2011
The Geosynthetic Materials Association (GMA) and the North American Geosynthetics Society (NAGS) are teaming up to provide a series of 1- and 1.5-day short courses for civil engineers. The target audiences are county, municipal, and commercial engineers who work on projects requiring geosynthetic reinforcement or geosynthetic separation applications. The first course is Aug. 11–12 in […]
Specifying allowable leakage rates
August 1st, 2011
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 the leakage rate below the set limit. To […]
Patch extrusion welding as a geomembrane failure mechanism
August 1st, 2011
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 contacted waste stored in this pond. A geosynthetic investigation into the root […]
Comparison of carbon footprints for various stormwater retention systems
August 1st, 2011
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 footprints. Geosynthetics have always provided cost-effective alternatives to traditional construction […]