Compensation Grouting
To minimize ground movement while tunneling a sewer 5 m below Toronto's Spadina subway line, engineers used special instrumentation, tunneling control and grouting to limit...
Stressing Masonry's Future
Post-tensioning techniques are expanding the possibilities for masonry in building and bridge construction. Two projects in Britain and the U.S. show the rewards of rethinking approaches...
Public Water in Private Hands
The nation's water utilities are becoming a battleground for control between private companies that want a share of the market and public employees who are bidding for their...
Putting On Your Safety Cap
Geomembranes are an important part of landfill cap design. However not all geomembrane liners are created equal, and it's best to know what a liner is made of before specifying...
On the Texas Fast Track
When Texans do something, they do it big, and they do it fast. So it comes as no surprise that the second largest sports facility in the U.S., Texas International Raceway, is currently...
Net Results
On any sort of cleanup, digging is expensive and intrusive, but when the cleanup involves unexploded artillery shells and other munitions, digging can also be dangerous. Understandably,...
Dam Engineers Go Over the Top
In the 1980s, dam engineers with the Lower Colorado River Authority worried that the Wirtz Dam, near Austin, Texas, would fail in the event of a maximum probable flood. They looked to...
Monumental Restorations
Modern nondestructive field surveys and state-of-the-art static dynamic monitoring systems provide important information for historical renovations while ensuring that the structure remains...
Risk Management at Wahleach Dam
In a first-of-its-kind application, engineers used risk analysis to make event-driven design decisions to evaluate dam safety improvements at Canada's Wahleach Dam in British...
Design/Build Goes Light
Full speed ahead: Those might well be the bywords of Baltimore's Central Light Rail Line extension, a trailblazing project believed to be the first in which the design/build...
Saving a Sinking City
A construction team repairing a bridge or expanding a hospital usually must work around the daily activities of the affected group of people. But for a construction project in Co-op City,...
Tunneling Against Time (Available only in the Geoenvironmental Special Issue)
The phenomenal growth of Las Vegas has prompted nearly $1 billion worth of water-supply projects. A $33 million tunnel scheme�a critical element of the new construction�is on pace. The...
Bulb-Tees Make More Efficient Long-Span Bridges
The bulb-tee girder has helped erect new bridges with fewer I-beams, and is also shown in studies to be a structurally efficient, cost-effective alternative for long-span bridges....
Channel Stability Assessment for Flood Control Projects
This manual provides assistance for determining potential channel instability and sedimentation effects in flood control projects. It is intended to facilitate consideration of the type...
Barricades on the Roads
Many Build-Operate-and-Transfer schemes in developing economies have been less than successful. Here are pitfalls to avoid and recommendations for reaching a project's full...
Mapping with a Differential
A southern New Jersey landfill is using Differential Global Positioning System topographic surveying to cut costs and turnaround time on annual mapping and volume certification. Modern...
Watching Under Boston
Managing the daily operations of Boston's Central Artery/Ted Williams Tunnel project requires integrating a variety of hi-tech systems to ensure efficient traffic flow. The...
A Bumpy Road
The Wisconsin Department of Transportation (DOT) was among many state and local agencies to develop a comprehensive pavement management system in the late 1980s. Its system was unique...
Manhole Rehab
Using trenchless technology, two construction crews working on the Massachusetts Water Resources Authority's Wellesley Extension Relief Sewer project rehabilitated 83 manholes...
Saving Face
Inspections revealed that the glass-fiber-reinforced concrete (GFRC) and ceramic tile cladding on a wing of the University of Washington Medical Center, Seattle, failed and needed to be...
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