Building bridges the geosynthetic-reinforced soil way

June 1, 2010

From Defiance County, Ohio, to Yamhill County, Oregon, building bridges using geosynthetic-reinforced soil is gaining popularity for its effectiveness, efficiency, and time-saving simplicity. This methodology was first featured in Geosynthetics in August 2006, with a follow-up in April 2008. Defiance County Engineer Warren Schlatter and his crews, with initial assistance from the Federal Highway Administration …

U.S. geosynthetics market is poised for a comeback in 2010-11

By Jeffrey Rasmussen While U.S. geosynthetics manufacturers and distributors assess 2009’s lackluster performance, they can also look forward to the possibility of meaningful improvements before the end of this year. Sales in 2009 were down about 4-5%. However, a slow but steady growth is expected this year and into 2011. The decrease in sales and …

Cooley appoints business development manager

At the Cooley Group, David Shields has been appointed business development manager for Cooley Engineered Membranes. His responsibilities will include identifying and developing new markets for that division, according to a company press release. Citing his extensive background with the aviation industry and as former director of business development for a large specialty coating and …

Personnel update at NAG

North American Green has named Gabe Weaver to the new position of manager of engineering and business development. In a press release this spring, the company said it “has married innovation with expertise in the erosion control industry,” given Weaver’s background as a professional engineer plus his new master of business administration (MBA) degree. It …

Purging the geosynthetics system of dated test methods and specs

By Bob and George Koerner In May 1998, Maryann Gorman wrote a commentary in ASTM Standardization News entitled “How Specifications Live Forever.” She began the article by explaining how standard gauge railroad track spacing in North America is 4ft-8.5in. (1.4351m). It seems that this precise dimension dates from Roman times because “the Imperial chariots were …

Geosynthetics: The present and perspectives from Mexico

By Andrew Aho The Mexican economy has been battered by both the worldwide financial crisis and the effects of a steep downturn in the U.S., Mexico’s largest trading partner. And if that was not enough, Mexico’s economy absorbed another blow last year with its virtual shutdown during the swine flu pandemic. A gathering of the …

Bernard Myles was my friend

Written Wednesday, April 28, 2010 by Pete Stevenson Bernard Myles was my friend. We met in 1980 in New Orleans at an organizing meeting for the IFAI geotextile committee where he was the only sensible voice. During the next 30 years he became my friend and he remained a sensible voice. He was a teacher, …

MSE walls support laterally loaded drilled shafts

A new take on sound-barrier walls. By Jie Han, Robert Parsons, Matthew Pierson, and James Brennan Introduction When residential areas are close to highways, sound barrier walls are often constructed to minimize noise from traffic on those roads. Under certain circumstances, mechanically stabilized earth (MSE) walls are used to support the sound barrier walls. Figures …

Geosynthetic materials play a major role in new underground stormwater detention system

By Terence G. Sheridan, P.E. Introduction Stormwater management is an ever-increasing expense on site development projects. Stormwater detention ponds are designed to protect against downstream flooding and environmental degradation. The standard of practice is to ensure that post-development flow from a site does not exceed the pre-development rate for a given storm event. Where land …

Retractable geomembrane covers provide multiple efficiencies for Bay Area wastewater plant

A retractable, structurally-supported geomembrane cover system provides odor control and ease of maintenance access for the Vallejo Sanitation and Flood Control District. By Jim McMahon Introduction The initial goal was to contain odors from its wastewater treatment plant. What the Vallejo (Calif.) Sanitation and Flood Control District (VSFCD) eventually realized is a fully retractable, structurally-supported …