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Comparative analysis of the flow and filtration capabilities of sediment retention devices—Part 1

February 1, 2021  |  Feature

By James E. Sprague and C. Joel Sprague Sediment retention devices (SRDs) include silt fences, wattles, filter logs, compost socks and various types of stormwater inlet protectors and are a widely used best management practice (BMP) to provide sediment filtration from stormwater runoff while allowin…
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Bituminous geomembranes (BGM) for ponds in mining

February 1, 2021  |  Case Studies, Feature

By Natalie Daly and Bernard Breul  Bitumen has emerged as a standard 20th-century waterproofing material in civil and water engineering in the form of bituminous concrete, asphalt and bituminous geomembranes. The first applications of bituminous geomembranes (BGM) were in France in 1975 near Gr…
Premier Product Showcase 2021 offers first look at new products and services

February 1, 2021  |  Feature, Premier Product Preview

Here is your first look at some of the new products and services that will be available from companies in 2021.  Geosynthetics Virtual Conference 2021 is co-locating with the IECA Annual Virtual Conference and Expo. The 2021 virtual show floor will bring together exhibitors covering the gamut o…
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A geosynthetic wrap-face vegetated wall system

October 1, 2020  |  Case Studies, Feature

For highway embankment construction  By Stanley M. Miller and Drew Loizeaux A recent creek enhancement project to facilitate the passage of bull trout in Pend Oreille County of northeastern Washington state required removal of a 6-foot (1.8-m) diameter concrete culvert (Figure 1), realignment o…
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CCR landfill final cover test pad—Part 2

October 1, 2020  |  Case Studies, Feature

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is being used in the final cover at a coal combustion r…
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Reinforced embankments for the causeway for a North Wales bridge project

October 1, 2020  |  Case Studies, Feature

By Patricia Guerra-Escobar  The Pont Briwet Project in Penrhyndeudraeth, North Wales, U.K., consisted of the replacement of a historic timber trestle bridge with a new 446-foot (136-m) long concrete viaduct and the upgrade of the approach road to the north and south of the crossing (Figure 1). …
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CCR landfill final cover test pad—Part 1

August 1, 2020  |  Feature

By Nina J. Balsamo, John Massey-Norton, John R. Klamut, Terry Queen,Charles F. Straley and Mark R. Lehner An integrated drainage system (IDS) geomembrane, which provides both a low-permeability membrane and drainage space above the geomembrane, is being used in the final cover at a coal combustion r…
Innovative geosynthetic solution saves 106-year-old Panama Canal structures

August 1, 2020  |  Case Studies, Feature

By Tom Stephens and Nicolas Ruiz The Panama Canal opened for business 106 years ago and was hailed as the eighth wonder of the world and an engineering marvel. It has become the most consequential global waterway ever constructed. Since 1914, more than a million ships of all sizes have passed throug…
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PVC sheet piling for cutoff and containment barriers

August 1, 2020  |  Feature

By Brendan Sheppard and Steve Hargrave Polyvinyl chloride (PVC) sheet piling (Figure 1) has been used for more than 25 years in bulkheads throughout the United States and beyond as a replacement for steel, concrete and timber materials due to the high corrosion resistance it offers in marine environ…
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Enhanced moisture management of pavement systems through capillary suction

June 1, 2020  |  Feature

By René B. Laprade and John M. Lostumbo Moisture within pavement layers is a principal cause of pavement deterioration (Cedergren 1994, Christopher and McGuffey 1997, Henry and Holtz 2001). Specific problems associated with moisture include (1) reduction in pavement strength caused by excess water …