From Good to Great: The Evolution of Cutoff Wall Quality Control and Verification Techniques
The last three decades have brought tremendous improvements to quality control (QC) procedures for construction and post-construction verification of deep cutoff walls installed in active high-hazard dams....

Seismic Performance of a Deep Soil Mixing Grid: A Magnitude 7.1 Load Test at the Port of Alaska
The Port of Alaska in Anchorage (Port) has embarked on a multiphase modernization program that includes the development of a new petroleum and cement terminal (PCT) berth. The berth consists of a pile-supported...

Learning From Pile Driving Failures: Out of Sight Can't be Out of Mind
The design of driven pile foundations for static service and strength limit state loading conditions is meaningless if the piles cannot be driven to the required depth and nominal resistance without sustaining...

In the Wake of the Mount Polley Mine Tailings Breach: Tailings Dam Design, Innovation, and Practice Changes
The Mount Polley tailings dam in British Columbia (BC), Canada, failed in 2014, spilling approximately 21 million m3 of water and tailings (estimated as approximately 50/50 water and tailings) into Hazeltine...

Risk in Geotechnical Practice: Unraveling Foundation Uncertainty
Statistical Analysis Offers a Rational Approach for Controlling Foundation Risk in Design-Build Projects. For the past 20 years, design-build (DB) procurement has become the default for many transportation...

Tsunami Loads and Effects
Guide to the Tsunami Design Provisions of ASCE 7-16
The devastating tsunamis that struck Chile and Japan in 2010 and 2011 underscored the critical need for new structural design criteria to improve building resilience and safeguard human life. They also...

Delivering Olmsted Lock and Dam
The Olmsted Locks and Dam, the largest civil works project by the US Army Corps of Engineers since the Panama Canal, became operational in August 2018. More than 30 years in the making, the $3-billion...

Mixed Foundations Resolve Complex Conditions
A 46-story residential tower currently under construction in downtown Boston abuts an existing parking garage, necessitating extreme care to ensure its stability amid tight space constraints. Part of the...

A Combo Foundation Does the Job: Piled-Raft Foundation Design for a Supertall Skyscraper
Lotte World Tower is a 123-story, 555-m supertall skyscraper with a 6-level basement for retail and car parking located at Jamsil-dong in Seoul, South Korea. (Editor’s Note: For additional information,...

Immortal and Ethereal Beauty in Stone: The Taj Mahal
The Taj Mahal, probably one of the most beautiful structures in the world, has withstood the vagaries of history and the environment. Lengthy tomes have been written on its beauty and the details of the...

Paleoflood Analyses For Dam and Levee Safety Assessments: Was that Really the "500-Year Flood"?
What is paleoflood hydrology? How are paleofloods analyzed? What are common paleoflood results? What are the implications of paleoflood analyses?...

When Bridges, Roadways, and Dams Need Our Help: Innovative Techniques Can Help Save Our Nation's Critical Infrastructure
The nation's infrastructure is showing its age. The signs are obvious with structure distress, lack of functionality, and failure reported frequently over the last several decades. Specialty geotechnical...

Glacier Skywalk: Foundations for a Canadian National Park Landmark
Jasper National Park, the largest national park in the Canadian Rockies, is located in the Province of Alberta, north of Banff National Park and west of Edmonton. Declared a UNESCO World Heritage Site...

Dry Dams in the Desert: Chasing Land Subsidence and Earth Fissures with Geophysics
Homogenous embankment dam flood retention structures (FRSs) were built throughout central Arizona desert basins in the mid-twentieth century to protect mostly agricultural lands and military installations...

Oroville Dam Spillway Incident: Putting Community Safety First While Investigating the Cause
The Oroville Dam, and its associated reservoir and hydropower plant facility, is located on the Feather River in Northern California and is owned and operated by the State of California, Department of...

Restoring Steinbeck's Carmel River: The Removal of San Clemente Dam
If you've read John Steinbeck's 1945 classic "Cannery Row," then you're already familiar with the Carmel River, which he described as "…a lovely little river. It isn't very long, but in its course it has...

Whose "Fault" Is This? Overcoming Faulting and Ancient Landslides in a Dam Abutment
The Calaveras Dam Replacement Project (CDRP) is the largest project in the San Francisco Public Utilities Commission's (SFPUC) $4.8 billion, multi-year Water System Improvement Program (WSIP). The program...

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...

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....

Calibration of Jackup Leg Foundation Model Using Full-Scale Structural Measurements
The fitness of jack-up rigs to operate in varying water depths and weather conditions is determined by "site-specific" structural assessments. These assessments are conducted by a wide range of companies...

 

 

 

 

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