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Water woes addressed by newly lined reservoir

April 1, 2015

Chowchilla pistachio farm By Raphael Bennett Introduction Situated on 600 acres of pistachio farmland located in the northern San Joaquin Valley of California, this farm management conglomerate wanted a solution to its water accessibility issues. Due to the current water climate in California, the water loss problem with the reservoir as it previously stood had …

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Part 1: The first double geomembrane liner 40 years later

February 1, 2015

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. …

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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 …

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Design considerations for GCLs in leach pad liner systems

October 1, 2014

By Chris Athanassopoulos and Mark Smith Introduction Traditionally, leach pad lining systems have consisted of a single geomembrane liner placed directly over a prepared subgrade of locally available soil or, occasionally, compacted clay. Heap fills are most commonly constructed by placing a layer of highly-permeable drainage stone (overliner) over the geomembrane, usually with perforated drainage …

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Wakeboarding lakes get synthetic turf revetments

Erosion control, turbid water addressed with new shoreline protection By Paul O’Malley Introduction The newly opened Terminus Wake Park is located within the LakePoint Sporting Community and Town Center Complex in Emerson, Ga., just off Interstate 75, about 30 miles northwest of Atlanta. This park represents one of the latest examples in a growing trend …

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Geotextile tubes as submerged breakwaters

August 1, 2014

Improvements in wave transmission reduction for beach restoration By Alfonso Solís Pimentel, González Leija Mariana, Aguilar Escalante Sergio Abstract The north coast of the Yucatán Peninsula in Mexico has been in a regression process for decades. After Hurricane Gilbert (1988) and Isidore (2002), beach erosion increased dramatically. Human actions around the development of harbors and …

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Designing to minimize geomembrane leakage

By Abigail Beck Introduction Specifying a geomembrane as a barrier system component for a containment facility seems like a straightforward task. Once a geomembrane is specified, the containment facility won’t leak, right? The reality behind geomembrane installations is that the ultimate performance of an installed geomembrane ranges from completely ineffective to highly effective. What creates …

Geosynthetics stabilize deteriorating mine roads

Improvements in wave transmission reduction for beach restoration By Branden Reall Introduction The roads of a mine are the arteries through which all products (and by-products) pass. Throughout the day, metals and materials are recovered and large trucks make repetitive, usually slow, trips up and down mine haul roads. While mining companies understand how processes …

Colombia gold mine MSE project

By Chip Fuller Introduction A Canadian firm, Continental Gold Ltd., is a precious metals mining company and it currently operates the largest gold mine in Colombia, the Buriticá project. Mining products provide approximately 20% of Colombia’s exports and 2.5% of its GDP. The Buriticá project covers more than 13,500 hectacres (33,345 acres) and is located …

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Void bridging with specialty geosynthetics and thin covers

By Brian Baillie Introduction Geologic or hydraulically formed cavities and sensitive utility trenches are sometimes a concern on construction, mining, and environmental containment sites. Naturally formed or man-made openings such as these can complicate the design and performance of overriding structures or create restrictions with site access. They can also create significant safety issues for …