On the waterfront

October 1, 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, …

Geogrid provides erosion control, slope stability

September 22, 2011

Introduction The slope adjacent to the athletic fields at Saint Mark Catholic School in Huntersville, N.C. was the site of fairly severe surface erosion. A project to restore the slope with reinforcing geogrids was completed in 2010. The athletic field slope that had been failing was restored and Saint Mark Catholic School was able to …

Geofoam plays a supporting role in academic and civic projects

September 21, 2011

Known primarily for its use as a soil stabilizer in transportation projects, expanded polystyrene (EPS) geofoam is now being viewed by engineers and contractors as the material of choice for an array of other commercial applications. With high compressive strength, light weight, and predictable performance, geofoam is appealing for reducing weight on concrete decks, creating …

Comparison of carbon footprints for various stormwater retention systems

August 1, 2011

Introduction Construction materials continue to be a major source of greenhouse gases (GHG), based on the fossil fuels used in their production. As the amount of greenhouse gases generated each year continues to increase, there is a conscious effort to provide alternatives with lower carbon footprints. Geosynthetics have always provided cost-effective alternatives to traditional construction …

Patch extrusion welding as a geomembrane failure mechanism

Geomembrane performance: Lessons learned—Part 2 By Garrett Q. Dutson Introduction This case history examines the geosynthetic construction, use, failure, and repair of an evaporation pond at an EnergySolutions facility in Clive, Utah. A high priority is placed on management of water that has contacted waste stored in this pond. A geosynthetic investigation into the root …

A better way for the Beltway

By Alan Dinges Introduction Each day close to 50,000 motorists travel through the Telegraph Road interchange on the integral Interstate-95/495 Capital Beltway between Virginia and Maryland, south of Washington, D.C. In early 2008, extensive upgrades to the interchange began as part of a multi-year project tied to the final phase of the Woodrow Wilson Bridge …

Sustainability and the fiber-reinforced soil repair of a roadway embankment

By Garry Gregory 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) Introduction Site history Joe …

EPA identifies case studies for hydraulic fracturing study

June 27, 2011

Agency to conduct field work in various regions of the country starting this summer. The U.S. Environmental Protection Agency (EPA) announced in a June 23 press release the next steps in its congressionally mandated hydraulic fracturing study. The EPA has identified seven case studies to help examine potential impacts of hydraulic fracturing (“hydrofracting”) on water …

Wick drains in action at port project

June 24, 2011

By Angelle Bergeron The largest and deepest marine installation of wick drains in the world is ongoing at the Port of Virginia. Mark Palmatier, president and owner of U.S. Wick Drain (Leland, N.C.) said he is working on a project that is the largest and deepest marine installation of wick drain in the world, and …

New geomembrane for cracked reservoir

June 15, 2011

Replacing a geomembrane layer is part of a $163 million repair and expansion job for Tampa Bay Water’s (TBW) cracked reservoir. The Kiewit Infrastructure Group’s proposal aims to repair and expand the utility’s six-year-old, 15.5-billion-gallon facility. Kiewit estimates repairs at about $121 million. The contractor’s plan will remove and reclaim the reservoir’s existing flat-plate soil …