Geomembrane sealing systems for dams

April 1, 2008  |  Products

By Robert Koerner and John Wilkes Abstract The 2006 ICOLD Bulletin on Geomembrane Sealing System for Dams supersedes and greatly expands upon two earlier versions, published in 1981 and 1991. The 250 dams incorporating geomembranes cited in this new Bulletin include: 174 fill, 43 concrete, 32 roller…
Three challenges in using SRWs and other reinforced-soil structures: Part 2B

April 1, 2008  |  Case Studies

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build …
The GRS bridges of Defiance County

April 1, 2008  |  Features, News

By Michael Adams Introduction Three years ago, the Federal Highway Administration (FHWA) teamed up with local officials in Defiance County, Ohio, to test a new prototype geosynthetic-reinforced soil (GRS) integrated bridge system. Built in 2005, the prototype GRS bridge on Bowman Road in Defiance Co…
Repairing Yi-Lan-I Road in Taiwan

April 1, 2008  |  Case Studies

By Vincent Ho and Steven Chang Introduction Stretches of the Yi-Lan-I Road in Taiwan are located more than 3,200ft (1,000m) above sea level. It’s an important road that provides the primary access to the National Taipingshan Forest Recreation Area. But during a particularly rainy 75-day period…
A forensic hypothetical: The case of the percolating water

April 1, 2008  |  Products

By Dov Leshchinsky Introduction Nearly every SRW system in the market has experienced some sort of failure. Like the power of chum in luring sharks, failures attract attorneys and engineering experts. Typically, the attorney for the plaintiff will compile “expert” reports providing a lis…
“Aqua” and “agri” featured at GSI’s 21st conference

February 1, 2008  |  News

The closely related topics of agriculture and aquaculture are the focus of our 21st Annual Conference on March 5, 2008 in Cancún, Mexico. As the date suggests, our conference will be “nested” within GeoAmericas 2008, which is being held at the same location March 2-5, 2008. For co…
Personnel moves at Fiberweb, Thrace

February 1, 2008  |  News

Fiberweb’s Filtration Americas business has announced three promotions and a new hire.Fiberweb’s Filtration Americas business has announced three promotions and a new hire. Kim Rolman has been promoted to director, Cartridge Filtration, overseeing business responsibilities for cartridge …
Contech grows sales force

February 1, 2008  |  News

Contech Construction Products Inc. has expanded its national sales force with the addition of 40 new employees. The expansion was needed to respond to rapidly growing geographic market gains as well as new business opportunities, according to the company. Contech said recruiting efforts got under wa…
Layfield acquires distribution rights to Aqua Dam in Canada

February 1, 2008  |  News

The Layfield Group of Companies has acquired Aqua Dam distribution rights in Canada from Aqua Dam and Diversion Ltd. Aqua Dam specializes in the supply and installation of water-filled portable dams, designed to contain or divert the flow of water. Standard application include stream and river diver…
Propex, NAUE reach agreement on geogrid distribution

February 1, 2008  |  Products

Propex Geosynthetics has reached an agreement with NAUE GmbH & Co. KG to be the exclusive distributor for Secugrid and Combigrid biaxial geogrids in the United States. The agreement took effect Jan. 1. As the exclusive distributor of NAUE biaxial geogrids, Propex will be responsible for all sale…