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Geonet composite for Red Willow Dam
October 4th, 2011
The U.S. Bureau of Reclamation (BR) has awarded a $15.3 million contract to SEMA Construction Inc. for rehabilitation of the Red Willow Dam in south-central Nebraska. Problems at the dam have been a concern since discovery of a sinkhole and cracking through the dam’s embankment in 2009. SEMA, Englewood, Colo., is contracted to: excavate the […]
GSE offers two more geosynthetics seminars
October 3rd, 2011
GSE continues its series of “Geosynthetics 4 Success” technical seminars at two more sites this fall. Oct. 13, the “4 Success“ seminar will be at the Omni Hotel in Pittsburgh. The primary topics include the latest developments in geosynthetics and the use of geosynthetics in shale-gas and coal-ash containment applications. Speakers for the Pittsburgh event […]
Facilitating interaction between engineers and contractors
October 1st, 2011
Editor's Note: Bob Koerner wrote about the Geosynthetics Institute's second Inspector Certification Program in the August/September 2011 issue of Geosynthetics and he responds to this query. Question From: Chet Soydemir To: Ron W. Bygness Subject: GSI News Dear Editor of Geosynthetics: I read with great interest the “GSI News” section prepared by Dr. Robert Koerner […]
Geo-Frontiers 2011: A Geo-Success!
October 1st, 2011
Editor's Note: North American Geosynthetics Society president, Dean Sandri, originally wrote about Geo-Frontiers 2011 for IGS News. He, and IGS News, agreed to the revised printing of his commentary via this letter to the editor. To the editor: If you were there, you know it was a geo-success! Kudos to organizers Industrial Fabrics Association International […]
The role of geosynthetics in the new New Orleans levees
October 1st, 2011
By Angelle Bergeron Introduction Geosynthetic materials are playing a critical role in providing New Orleans with its best flood protections ever. “We couldn’t have delivered this work by 2011 without geosynthetics,” said Richard Varuso, deputy chief of the geotechnical branch of the U.S. Army Corps of Engineers’ New Orleans District (USACE/NOD). “Geosynthetics save construction time.” […]
Emergency water supply: The Upper Chiquita Reservoir
October 1st, 2011
By Steve Roades Introduction The recently completed Upper Chiquita Reservoir in Southern California was built to provide the region with substantial new water reserves to meet customer demand during disruptions of water deliveries. These interruptions can be unanticipated—for example, the 1999 break in a primary supply pipeline—or planned, such as a shutdown of the filtration […]
On the waterfront
October 1st, 2011
A plan to rework the Don River Park near downtown Toronto uses geotextile-wrapped wick drains to remediate soil and drainage problems By Adam Regn Arvidson A new neighborhood is growing on 80 acres (32 hectares) of former industrial land near downtown Toronto. Called the West Don Lands, it will be home to 6,000 housing units, […]
Reduced CO2 emissions and energy consumption with geosynthetic installations
October 1st, 2011
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 carbon footprint perspectives. (from the Geosynthetic Research Institute’s 24th conference, 2011) Abstract In April 2010, GSE released a […]
Liner questions
October 1st, 2011
From the GMA Techline RE: Liner questions I am designing a surface impoundment with interior side slopes of 1.5H:1V. This impoundment requires (per regulations) a geosynthetic clay liner (Bentomat DN or equivalent), 40-mil HDPE secondary liner, and 60-mil HDPE primary liner. A leak-detection system has been requested. The pit is small (approximately 500ft x 200ft) […]
Comparing GCLs
October 1st, 2011
From the GMA Techline RE: GCLs I need some assistance in comparing two geosynthetic clay liners for a project where the specification gives a total bentonite mass required of 4500g/m2 and a target hydraulic conductivity of < 5 × 10-11. We have an option of a liner that far exceeds the requirement of the hydraulic […]