Pinning milfoil to the mat

February 1, 2007  |  Case Studies

The latest effort to foil further growth of milfoil on a pond in Litchfield, Maine, has taken the form of layers of black, geotextile mats. A diver has placed the mats like carpet on the bottom of Upper Pleasant Pond in an area where a group of variable-leaf water milfoil plants was already marked o…
Read More
ECTC’s updated technical manual now available

February 1, 2007  |  Features

A revised and updated guidance document by the Erosion Control Technology Council (ECTC) is now ready for industry professionals. Titled “A Technical Guidance Manual: Terminology, Index & Performance Testing Procedures for Rolled Erosion Control Products,” can be found on ECTC’…
Read More
New officers for ASCE

February 1, 2007  |  News

The American Society of Civil Engineers (ASCE) installed newly elected officers to its board last October. The new board representatives include: William F. Marcuson III, Ph.D., P.E., Hon.M.ASCE, director emeritus of the Geotechnical Laboratory at the Waterways Experiment Station in Vicksburg, Miss.…
Read More
Mountain route flowing now

February 1, 2007  |  Case Studies

Traffic on Highway 330 through California’s San Bernardino Mountains returned to near normal last fall after CalTrans reopened the route to motorists following three months of detours and closures. The route between Highland and Running Springs had been closed off and on while a $7.5 million slope…
Read More
GMA-Mexico offers classes

February 1, 2007  |  News

The Mexico office of the Geosynthetic Materials Association designed and delivered two courses last fall. One was for the Mexican Army’s Departament of Engineering; the other with open enrollment for civilian engineers and academics. The military engineers were very receptive last September to…
Read More
Overview of GSI’s surveys

February 1, 2007  |  GSI News

By Bob Koerner It appears to this writer that any forward looking decisions—business or otherwise—should be made on the basis of factual information from the past. My son sent an E-mail to me stating: “Without data, yours is just another opinion!” One step further in gathering this data is t…
Read More
Junction-strength requirements for roadway design, construction

February 1, 2007  |  Products

By Barry R. Christopher Introduction Currently many engineers are confused about junction-strength requirements for geogrids used in roadway base reinforcement and subgrade stabilization applications, primarily because of commercialism of junction strength requirements. Some promotional efforts reco…
Read More
Liner integrity/leak-location survey: The significance of boundary conditions

February 1, 2007  |  Features

By Ian D. Peggs Introduction A geoelectric integrity survey was requested on a new landfill cell with the following lining system from the top down: 18 in. sand Geotextile/geonet/geotextile composite (geocomposite) Primary geomembrane Geosynthetic clay liner (GCL) Geomembrane (rub sheet) Geocomposit…
Read More
Massive mining evaporation ponds constructed in Chilean desert

February 1, 2007  |  Case Studies

The Salar de Atacama in Chile is the site of the largest PVC geomembrane installation in the world—more than 16 million m2 utilized in mining operations since 1996. By Dominic Berube,1 Patrick Diebel,2 Andre Rollin,3 and Timothy D. Stark4 The largest PVC geomembrane installation in the world i…
Read More
Five-year CalTrans freeway project is nearing completion in San Diego

February 1, 2007  |  Case Studies

From the 2006 International Achievement Awards for Geosynthetic Projects Introduction In an effort to reduce traffic congestion and improve safety conditions in northern San Diego, the California Department of Transportation (CalTrans) is adding lanes and creating a truck bypass at the Interstate 5/…
Read More