Attractive Alternative
The Lewis and Clark Bridge, an elegant cable-stayed bridge with diamond-shaped towers, connects highways in Indiana and Kentucky that had long been truncated and provides a clear alternative for interstate...

Parallel Line
The Manahawkin Bay Bridge carries Route 72 from the mainland of Ocean County, New Jersey, to the seaside destination of Long Beach Island. Since the route is the only vehicular link to the island, the...

Open Pit Geotechnics: Designing Slopes for a Very Deep Hole
For most hard rock surface mining operations, the development of an open pit is required to extract the ore resource. In designing an open pit, the challenge is to develop the most cost-effective pit slopes...

When Things Became Muddy: TVA's Response to Seepage Discharge at Boone Dam
In October 2014, the Tennessee Valley Authority (TVA) profited from investments in a robust dam safety program. This profit did not come in the form of money, but more importantly in the protection of...

Dam Safety Management Using Risk-Informed Decision-Making Methods: A Powerful Tool or an Unnecessary Venture?
This article discusses design standards, safety methods, and risk-informed decision-making methods for dams....

U.S. EPA ‘Action Plan’ Proposes Steps to Improve Public Health

Stormwater Measures Designed to Safeguard California Tailings Dam

Extreme Makeover
Interchange Gets Ground Improvement Facelift
As part of the massive, $159.9 million Interchange 14A Improvement Project in the cities of Bayonne and Jersey City, NJ, the New Jersey Turnpike Authority (NJTA) is realigning 12 ramps and roadways and...

What Does the Case Law Say? Geotechnical Risk on Design-Build Projects
The growth of design-build (DB) contracting, particularly on public-sector civil projects, has generated a great deal of industry discussion over the age-old question of who should bear the risk of unforeseen...

Licensure: A Matter of Public Safety

Geotechnical Aspects of Pavements: There's More to Roads than Asphalt and Concrete!
When you jump on the highway to make that commute to work, do you think much about what's under the surface you ride on? Pavements are layered systems designed to provide a strong structure to support...

Landslide Risk Perception: Consequences of Failure to Reconcile Contradictory Beliefs
While the basis for geotechnical safety is important, public perceptions of risk and its apparent willingness to ignore or discount hazard warnings should also be considered. Why does...

Conduct of Operational Hail Suppression Projects
Those conducting hail suppression operations should be vigilant and always prepared to react when potential hailstorms begin to develop. In this chapter, some guidance is provided for...

Shafts/Temporary Structures
Shafts should be of a size to accommodate the equipment and pipe selected and to allow for safe working practices. If the shaft must accommodate the permanent works, it is the contractor's...

Microtunneling Operation
The shaft should provide safe working conditions and fully support the ground. Jacking and receiving shaft support system and sizes are typically determined by the contractor. See Chapter...

Regulations
The contractor should meet federal, state, and local regulations. The contractor is responsible for jobsite safety....

Very Long-Term Care of Mechanically Stabilized Earth Berms: Limiting the Liability of Future Stakeholders
Since their development over 50 years ago, civil engineering applications of mechanically stabilized earth (MSE) berms have significantly increased. When used as a component of an asset...

How Safe is Safe Enough? Technological Risks, Real and Perceived, By E. E. Lewis. New York City: Carrel Books, 2014

Evaluating Bridges With Unknown Foundations for Susceptibility to Scour: North Carolina Applies Risk-Based Guidelines to Over 3,750 Bridges
Scour occurs when flowing water removes erodible material such as sand and rock. For bridges over water, scour affects the stability of pier and abutment foundations and contributes to...

Grade Separation Project Improves Rail, Road Safety

 

 

 

 

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