Emergency Retaining Wall Replacement: The East 26th Street Slide Repair in Baltimore, MD
During a record rainfall on April 30, 2014, a century-old, stone retaining wall between a dense urban roadway (26th Street) and the CSXT railroad track in Baltimore, MD, failed. The stone retaining wall...

Highway Retaining Walls are Assets: A Risk-Based Approach for Managing Them
Throughout history, retaining walls (RWs) have served a vital role in supporting civil infrastructure. The ruins of dry stone walls that purportedly supported the hills and slopes of ancient Rome can be...

Geotechnical Risk Management

Foundation Reuse and Enhancement: A Viable Option for Bridge Widening and Replacement Projects
The transportation system in the U.S. includes over 607,000 bridges for grade separations, interchange configurations, and stream crossings. As governmental entities embark on the rehabilitation and rebuilding...

Recommended Practices for Design Professionals Engaged as Experts in the Resolution of Construction Industry Disputes

Answering the $64,000 Question: Geotechnical Risk in Design-Build Projects
Subsurface risk may well be the aspect of most construction projects that has the greatest potential impact on a project's success or failure. Even when a thorough geotechnical investigation is conducted...

Geotechnical Delivery on Mega Transportation Projects: Challenges of Accelerated Delivery
Transportation projects have traditionally been delivered through the design-bid-build (DBB) delivery model, which continues to be the preferred method of delivering the majority of smaller and more traditional...

Improving Cost and Schedule Performance on Municipal Pipeline Projects: Realizing the Benefits of the Construction Manager at Risk (CMAR) Alternative Project Delivery Method
The water and wastewater infrastructure in the United States is failing. In its 2013 Report Card on American Infrastructure, ASCE stated: "The water and wastewater...

The Evolution of Launched Soil Nails: A 30-Year Retrospective
Launched soil nails are a unique remedial technology in the geotechnical construction toolbox. These 20-ft-long, 1.5-in.-diameter nails are installed in a single shot using a compressed air "cannon" at...

A Sinking Feeling in Happy Valley: Limited Mobility Grouting Arrests Movement of Emergency Room
Shortly after construction began on a new emergency room addition at the Mount Nittany Medical Center in State College, PA (a.k.a. "Happy Valley"), the existing structure and new construction began to...

The Rise of UAVs Signals a New Era in Geotechnics: Big Data in Geotechnics is Coming from Above
If you have been following the news, browsing the internet, or even gazing up in the sky, it is likely that you have seen an Unmanned Aerial Vehicle (UAV), also commonly known as Unmanned Aircraft System...

Biogeotechnical Mitigation of Earthquake-Induced Soil Liquefaction
Three biogeotechnologies currently under development show promise for cost-effective remediation of liquefaction under existing facilities....

Deep Mixing Grows Up: The Evolution of Deep-Mixing Technology in the U.S. Market over the Last Decade
Over the last decade, deep mixing in the U.S. market has grown from being something of a mystery into a reliable ground modification technology that can be designed rationally, implemented with capable...

A History of Deep Vibratory Methods for Ground Improvement: A Cost-Effective Foundation Solution for 80+ Years
Deep vibratory ground improvement methods, collectively referred to as vibro systems, have been utilized by the construction community in one form or another for the past 80 years. Development of the equipment,...

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...

Soil Nailing in the 2010s: Its Evolution and Coming of Age
While the early 2000s witnessed soil nailing as a well-established method in the U.S. for providing temporary and permanent support of excavation (SOE), the technique has since continued to evolve thanks...

Final Rule Offers More Details on What Constitutes Waters of the United States

Improved Channel Reduces Flash Flooding Risk for Colorado Town

Construction Begins on Major Shore Protection System on New Jersey Island

Introduction
The purpose of this white paper is to: foster understanding and transparency of analytical methods necessary to update and describe climate, including possible changes in the frequency...

 

 

 

 

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