Modeling Contaminated Sediments
Using a computer model to analyze and predict sediment transport only works when the analyst considers the model's limitations and the physical processes involved, and conducts...
Seepage Stoppers
After 65 years of continuous operation without any major rehabilitation, the Detroit-Windsor tunnel had sprung a few leaks. Engineers used elasticized grout to stop the seepage, a material...
Washington Buildup
Despite its reputation as a city mired in fiscal crisis, Washington, D. C., continues to improve its basic infrastructure. A look at three ongoing projects�a sports arena, a waste water...
Pump and Treat and Wait (Available only in the Geo/Environmental Special Issue)
Pump and treat, a common ground-water cleanup technique, is slow to clean up deep contaminated aquifers. Adaptive intermittent pumping can increase the cleanup rate�and decrease costs�by...
Asphalt-Concrete Water Barriers for Embankment Dams
Because of its simplicity in design and construction, the asphalt concrete core is rapidly becoming the water barrier of choice for embankment dams in many parts of the world. This is...
Evaluation of the Troxler Model 4430 Water-Cement Gauge
Prepared by the Highway Innovative Technology Evaluation Center, a CERF Service Center. This report describes a HITEC evaluation designed to determine...
Detecting Leaks Electronically (Available only in Geo/Environmental Engineering Special Issue)
An innovative monitoring system originally developed to detect cyanide leaks at gold mines can now monitor the integrity of geosynthetic liners at municipal- and hazardous-waste landfills...
The Human Side of L.A. Metro
Encino, Calif.-based photographer Ken Karagozian was given access to the construction of L.A. Metro's Red Line. Karagozian tries to capture not only the scope of the work...
Boston Blockbuster
The Central Artery/Tunnel project in Boston is probably the single largest publicly-funded transportation project in the country at present. The total cost will be between $8 and $10 billion...
Underground Contracts for the 21st Century
Noting that support for the guidelines for underground construction put forth by ASCE's Underground Technology Council has been eroding, the author addresses current issues...
On Target: The Arrowhead East and West Tunnels
Two new water tunnels in Southern California will feature continuous impermeable linings, extensive probing and grouting, and unique seismic sections to minimize damage in fault zones...
Portland's Light Rail Goes Underground
A 29-km extension of Portland's first modern light rail system nears completion. The extension includes a 4.6 km twin-tunnel section and the deepest transit station in North...
Hawaii's Interbase Interstate
Connecting two major military installations, Hawaii's third Interstate highway (H-3) is the largest ($1 billion) HDOT project to date as well as the longest in time (planning...
Water Quality Regs: Staying Ahead
After a century in which water utilities could stay well ahead of most regulations simply by being responsible, professional organizations, they now seem to be playing catchup in a game...
Residual Benefits
Stringent pretreatment and effluent standards and a lack of capacity prohibit their release into sanitary sewer systems. Landfill disposal is costly. The National Pollutant Discharge Elimination...
Hong Kong Flies into the Future
Hong Kong's new airport, Chek Lap Kok, is scheduled to open in 1997. That is the year in which China takes over the government of Hong Kong from Great Britain. The airport,...
Grouting Through a River
A regional sewer district in Ohio is implementing a master plan to separate storm and sanitary flows, decommission some old treatment plants and upgrade others. Part of the plan, the West...
Soft Ground Not Easy Ground for TBM
The King County Department of Metropolitan Services (formerly called Metro), faced with the need to transfer wastewater from the West Seattle drainage basin to a secondary treatment plant...
Stormwater NPDES Related Monitoring Needs
This proceedings,
Cleanup Solution--Conflict Resolution
Distrust and misinformation often prevent timely resolution of ground-water contamination problems. In Toms River, N.J., engineers used a computer-generated model of the cleanup site in...
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