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....

Safer in Seattle
Constructed in the early 1900s, the Elliott Bay Seawall, in Seattle, protects the city’s downtown waterfront from the erosive forces of Puget Sound and Elliott Bay. Because of its deteriorating condition...

Pipeline Protection
To improve the seismic reliability of three critical pipelines, California’s Santa Clara Valley Water District installed what is believed to be the first large-diameter earthquake-resistant ductile iron...

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...

State of the Practice for Laboratory Testing of Soft Soils: It's All in the Details
As with all material testing, soils testing has undergone dramatic advances in technology because of computer automation. In the 1970s, laboratories were filled with dial gages, proving rings, mercury...

Replacing a Landmark
In replacing the historic Greenfield Bridge, which links the Pittsburgh neighborhood of Greenfield to Schenley Park, the bridge’s designers were challenged to re-create a landmark structure while minimizing...

First Person: Lucky Horseshoe
A $798-million Dallas highway project improved traffic flow into and out of the city’s downtown. The new “Horseshoe” interchange corrected the traffic bottlenecks and safety concerns of the original design...

Ready, Set, Launch
The replacement of a Warren through-truss bridge with a new structure similar in appearance over a very busy, 23-track rail yard in Minneapolis required prefabrication of steel trusses and an innovative...

The Virginia Difference
Designed in-house by the Virginia Department of Transportation, the recently completed Route 340 South Fork Bridge, in Front Royal, replaces an existing structure that dated to the early 1940s. The longest...

Sustainability and Resilience in Transportation Infrastructure Geotechnics: Integrating Advanced Technologies for Better Asset Management
The 2030 Agenda for Sustainable Development, adopted by the United Nations General Assembly in September 2015, enumerates 17 sustainable development goals (SDGs) to be achieved by the member countries...

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...

Step by Step
The Angus L. Macdonald Bridge has fully reopened after the completion of its “Big Lift” project in Nova Scotia, Canada. The endeavor involved replacing the entire suspended span and all the hangers of...

The New Dominion
The $400-million Dominion Boulevard Improvement Project, finished in 2016, is the largest locally administered project completed in the Commonwealth of Virginia to date. The project transformed Dominion...

NTSB Issues Preliminary Report on Florida Bridge Collapse (part of Infrastructure Solutions: Bridges Move Forward)
In late May, the National Transportation Safety Board (NTSB) released its preliminary report about the March 15 structural failure and collapose of a partially-constructed pedestrian bridge in Miami....

Infrastructure Solutions: Bridges Move Forward
ASCE’s 2017 Infrastructure Report Card assigned the nation’s bridges a grade of C+—one of the better grades in the assessment, but nevertheless indicating that improvements are needed. Fortunately, many...

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,...

Seismic Data from Smartphones: MyShake: Building a Global Smartphone Seismic Network
Increasing the density of earthquake-monitoring instruments at a fast rate and at a low cost is a dream for many researchers who study earthquakes. MyShake, a smartphone application developed by the Berkeley...

Claims against Geotechnical Engineers: Getting it Right in the Midst of Uncertainty
Geotechnical engineering is one of engineering's riskiest professions, prone to litigation due to the inherent uncertainty associated with characterizing the subsurface. Site investigations rarely provide...

Value Engineering Shaves Years and $1.8 Billion from Ohio River Bridges Project (part of "Attractive Alternative")
A value engineering process for the Ohio River Bridges Project, of which the Lewis and Clark Bridge is just one part, saved more than $1.8 billion and shaved nine years from earlier estimates....

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...

 

 

 

 

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