Project Highlights

Dubuque Landfill, Cell 9, Phase 2
Dubuque, Iowa

Design Engineering
AECOM

General Contractor
Connolly Construction

Geocomposite
GSE TenDrain

HDPE White Geomembrane
GSE Environmental

Geocomposite for landfill’s groundwater drainage layer

February 1, 2016  |  Features

Background Dubuque Landfill Cell 9, Phase 2, is located in Dubuque, Iowa. The original liner system (from bottom up) consisted of 1ft (30cm) groundwater collection layer, 8oz/sy (270g/m²) separation geotextile, 1ft (30cm) earth barrier layer, 2ft (60cm) compacted clay layer, 60mil (1.5mm) high-dens…
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Geogrid proven in logging industry demonstration

February 1, 2016  |  Features

Introduction During a 2014 logging industry event in the Pacific Northwest, geogrid was used to reinforce portions of a heavily travelled logging road. The demonstration was conducted during the Pacific Logging Congress, 7th In the Woods, held in Molalla, Ore. An aggregate haul road was constructed …
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Tight timeline + extreme specs = a notable RPE geomembrane install

October 1, 2015  |  Features

And with weather only Bigfoot could love. Introduction Northeastern British Columbia could, by most definitions, be considered the middle of nowhere. Tumbler Ridge (pop. 2,710), a district municipality in the foothills of the Canadian Rockies bordering Alberta, is and was from its inception in 1981 …
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Geosynthetics for the management, containment, and closure of CCR disposal facilities

October 1, 2015  |  Features

Background Coal combustion residuals (CCR) management and disposal facilities are facing an onslaught of increased scrutiny regarding environmental concerns in the form of the newly implemented CCR regulations and impending effluent limit guidelines and EPA’s 316(b) requirements for containment an…
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Part 2: Durability of geosynthetics

October 1, 2015  |  Features

Part 2 Durability of geosynthetics: The basics Author’s note This article is based on a training presentation delivered on Sept. 24, 2014, at the 10th International Conference on Geosynthetics in Berlin, Germany. That talk was itself based on courses given at ERA Technology, Leatherhead, U.K., wit…
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Report from the North American Geosynthetics Society (NAGS)

April 1, 2015  |  Features

By Bob Mackey ASTM Committee D35 on Geosynthetics The ASTM Committee D35 on Geosynthetics met in New Orleans, La., Jan. 28–30, 2015. There was significant progress within several of the D35 subcommittees as noted here: Subcommittee D35.03 on Permeability and Filtration The issue that generated a g…
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Design considerations

February 1, 2015  |  Features, News

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…
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Rail project required separation, filtration, reinforcement

February 1, 2015  |  Case Studies, Features

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 techn…
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Polymeric marine mattresses

October 1, 2014  |  Case Studies, Features

Case studies highlight marine mattress applications By Jeff Fiske Introduction Marine mattresses are rock-filled containers constructed with advanced UV-stabilized co-polymer geogrid materials. Geogrid panels are laced together to form mattress-shaped baskets that are filled with small stones simila…
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Allowable stress on geonets based on laboratory creep tests

October 1, 2014  |  Features

By Dhani Narejo and Sam Allen Introduction The first article in this three-part series presented compressive stress-strain behavior of several different geonet structures. The collapse, or rollover, does not occur for many types of geonets. In the absence of a rollover, the compression of geonets is…
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