Avoiding Impacts of Collapsed Mines on Railways: A Multidisciplinary Geophysical Detective Approach
The presence of abandoned mine workings can pose a significant risk to the use and development of surface structures above them, including railway lines. Typically, the adverse and often sudden effects...

Proactive Management of Landslide- and Rockfall-Prone Slopes: A New Program for Federal Land Management Agencies
Most people realize that the nation's transportation infrastructure is aging faster than federal, state, and local governments can manage with traditional methods. In fact, a national and international...

Using Geophysics to Assess Geohazards Before Construction: Increase Your Odds for Success!
Understanding subsurface conditions is the key to any successful construction project, including new construction, excavation, and drilling. The consideration and understanding of the subsurface geology...

Updating History
A beloved 1921 Parker truss bridge in Healdsburg, California, underwent an extensive rehabilitation and seismic retrofit so that the community could continue to use the historic crossing....

Helicopter-Based Geophysical Reconnaissance of Levees: A Faster, Cost-Effective Tool for Assessing Their Risk
As with much of the nation's infrastructure, people are becoming more and more aware of the condition of levee systems in the United States. The media cast a spotlight on the New Orleans levee failures...

Borehole Geophysics: Tools to Characterize Rock Properties
Effective design and construction in rock requires characterization of the engineering properties of the rock mass, as well as any associated geological features such as joints, faults, and bedding planes....

Railroad Tunnel Clearance Improvement and Linear Replacement: What Happens with Unexpected Ground Conditions during Tunnel Construction?
To increase the capacity and efficiency of transporting waste by rail to an existing landfill, Enviro Solutions Inc., the landfill owner, and CSX Transportation (CSXT), the rail line owner, sought the...

Railway Geotechnical Asset Management in Great Britain: How Modern-Day Techniques Help Monitor Railway Infrastructure Dating to the 1800s
This article discusses asset management, risk management, and earthworks failures as experienced by Network Rail (NR), the owner, operator, and asset manager of the majority of the rail network of Great...

What Does the Crystal Ball Say? Energy and Water Issues Are Too Great to Ignore!
Over the past 15 years, the Geoprofessional Business Association's (GBA) Emerging Issues and Trends Committee has held a series of Crystal Ball Workshops (Workshops) to identify long-term emerging issues...

Fire in the Hole: Emergency Repairs to the Robinson Creek Tunnel
On the eve of April 26, 2014, an arsonist set fire to the CSX Transportation (CSXT) Robinson Creek tunnel. The tunnel is located about 120 mi. southeast of Lexington, near Pikeville, KY. The 742-ft-long...

Guidelines for Construction Vibrations: How Much Rattle is Too Much?
The study of construction/blast-related ground vibrations on structures, people, and objects is a surprisingly diverse field. Vibration sources vary from blasting, all types of construction equipment,...

Rock Glue Gets the Job Done: Reducing Rockfall Hazards along the G.W. Parkway
After a large rockfall damaged the road and disrupted traffic along the George Washington Memorial Parkway in 2002, the National Park Service was looking for solutions to stabilize the slope against additional...

Risky Business: Identifying an Acceptable Rockfall Standard
For many parts of the U.S. highway system, cut slopes in rock are as common as bridges and embankments. These cut slopes, as well as some natural ones, produce rockfalls that pose risks to highway conditions...

Appraisal of Lightweight Moorings for Deep Water
This paper outlines the potential advantages of using lightweight fiber ropes for mooring floating production platforms. The influence of tether properties on mooring system response is discussed. It is...

Wider and Deeper (part of "A Greater Wonder")
A key component of the recent Panama Canal expansion involved the widening and deepening of Gatun Lake, the artificial lake that serves as the canal's reservoir, and the deepening of the Culebra Cut (also...

A Sunken Submarine Full of Mercury: Safe, Controlled Construction of a Counter Fill for Seabed Slope Stabilization at about 155 to 177 Meters
On December 5, 1944, with World War II still raging and peace in Europe still six months away, the German submarine U-864 set out on her maiden voyage on a secret mission to deliver strategic war supplies...

Automated Vibration Monitoring for Construction Applications: A Retrospective and Current Practice or… Everything Is so Much Easier Now!
My career in vibration monitoring (VM) began in the late 1980s. At that time, the state of the practice was primarily focused on blasting operations, which was driven by a boom in highway construction...

Tailings Dam Engineer of Record (EoR): There's Nothing Conventional About It
Engineer of Record (EoR) is a simple and resolute concept that's applied throughout the western world for civil works construction. It's a term that fits in a nice neat box; it represents a single person...

The Case for Tolerable Risk Guidelines to Manage Flood Risk: Nature Bats Last
Since ancient times, people have used levees to reduce flood risk. We have built over 30,000 miles of levees in the U.S., largely on the belief that levies will unconditionally protect people who live...

Difficult-Access Rockfall Mitigation: Design and Construction Way Up High!
Rockfall mitigation projects frequently require work at elevated positions. This is not something that comes naturally for many engineers and geologists. Palms sweat, knees knock, and voices may start...

 

 

 

 

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