Bituminous geomembrane in a final cover exposed to tidal action

April 1st, 2013

By Tarik Hadj-Hamou and Bertrand Breul Abstract Final closures of old abandoned landfills often pose technical and logistical challenges. A small (5 hectares/12 acres) landfill created by pushing waste into a tidal wetland on the edge of Suisun Bay in Northern California was no exception. The initially proposed final cover design called for 60cm (23in.) […]

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Measuring a giant one step at a time

April 1st, 2013

Leak location survey at the Columbus Upground Reservoir (CUGR) By Abigail Beck Introduction Once construction is complete later this year, the Columbus Upground Reservoir (CUGR) will be the largest continuously-lined lagoon on the planet, nearly twice as large as the lagoon currently holding that title. The sheer enormity of the project has been compounded with […]

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Use of geosynthetics in wind farm access roads

April 1st, 2013

Case histories from Poland, Canada, and U.S. By Stephan M. Gale, P.E., D.GE., Mark Kurtz, Fred Chuck, P.E., and Dick Janse Introduction The location of a renewable energy project is based on many technical and political issues. Sites are selected because of available wind forces, power distribution, and land leasing issues, but not normally on […]

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Back to the waterfront (in Toronto)

April 1st, 2013

By Ron Bygness In the October/November 2011 issue of Geosynthetics, we looked at how a popular section of Toronto was being redeveloped, thanks to the drainage power of the mighty little wick drain. The article “On the waterfront (in Toronto)” specifically featured the West Don Lands, an 80-acre area situated just inland from what developers […]

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Michigan P.E. makes a good catch RE: sg

April 1st, 2013

To the editor: Great issue (February/March 2013), read it from cover to cover. One thing I noticed though, on page 40 it states: “..were made of polypropylene, which has a specific gravity greater than 1,…” is incorrect. Typically polypropylene has a sg of 0.905 and that is why it floats, not sinks, as alluded to […]

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