HNY to all

February 1, 2015

By Ron Bygness Special Happy New Year (HNY) greetings are in order for our many readers, contributors, and colleagues involved with geosynthetics and Geosynthetics magazine. And HNY for all of our acronym friends who especially stood out in 2014: HNY, EPA—The U.S. Environmental Protection Agency was told by the court to finally issue its ruling …

Shale gas drilling wastewater

Questions and answers from the GMA Techline Shale gas drilling wastewater Do you know what kind of radioactive isotopes are found in shale gas flowback ponds? (Ed | Texas) Hi Ed, Bromine, radium, and radon are commonly brought to the surface with hydraulic fracturing. These natural radioactive elements are present in low concentrations in the …

Landfill stability analysis

Questions and answers from the GMA Techline Landfill stability analysis We are involved in a landfill that is beginning to shows signs of distress on one 3:1 (H:V) slope. I am attempting to back-calculate the waste strength in the distressed area using 2-D limit equilibrium method and insipient failure (FS=1); however, the liquid level in …

Part 1: The first double geomembrane liner 40 years later

First constructed in June 1974 and has been in continuous service since then. By J.P. Giroud and J.P. Gourc Introduction The first double liner with two geomembranes was constructed in June 1974 and has been in continuous service since then. The double-lined structure is a water reservoir located in Pont-de-Claix, near Grenoble in southeastern France. …

Design considerations

By Richard Thiel, Edward Kavazanjian Jr., and Xuan Wu Introduction Figure 1 shows a conceptual cross section of a landfill sideslope, including final grades at the end of waste placement and the ultimate grades due to the settlement that occurs following the end of waste placement. Settlement at any point in the landfill will be …

Reconstructing and relining Nottingham Lake high in the Rockies

Replacing a 32-year-old liner. By Bart Ewing and Duff Simbec Introduction Nottingham Lake is nestled high in the Rocky Mountains and has been the pride of Avon, Colo., for as long as anyone can remember. Tourists and residents use the lake for winter recreation and for boating, fishing, and swimming in the summer. It serves as …

Rail project required separation, filtration, reinforcement

Introduction The Canadian National Railway (CN Rail) wanted to build an additional six-track extension at its Transcona Yards in Winnipeg, Manitoba. Heavy railcars were expected to pass over this extension area and CN Rail was looking for an economical, efficient, environmentally friendly, and technically sound solution for its track extension. Challenges The construction site had …

Expanding the geosynthetics market

By Lucie Passus Lobby Day Fall 2014 Despite a shakeup in the U.S. Congress following the November 2014 midterm elections, GMA Lobby Day Nov. 18–19, 2014, saw its largest and most active member participation yet. More than 30 attendees from GMA member companies and geosynthetics allies convened in Washington, D.C., to participate in 28 congressional …

Global Geosynthetics Summit

By George Koerner As some of you know, the Geosynthetic Institute (GSI) and the Bombay Textile Research Association (BTRA) have had an association for more than five years. In September 2014, we advanced this relationship during the Global Geosynthetic Summit “Enhancing the Application of Geosynthetics in the Infrastructure Sector.” The summit was held Sept. 5–6 …

Report from the North American Geosynthetics Society (NAGS)

By Bob Mackey NAGS election results for 2015–2017 President—John Henderson President-elect—Richard Brachman Treasurer—Corey Bobba Vice Presidents—Dhani Narejo, John McCartney, Stan Boyle Congratulations to all! IGS proceedings library The International Geosynthetics Society (IGS) proceedings library is now online at www.geosyntheticssociety.org and can be accessed immediately to download papers from previous IGS conferences. This treasure trove of …