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 Moving Mystery
Along the southeastern edge of California’s Salton Sea, there are areas that contain geothermal mud pots and mud volcanoes—Geological features that may change shape, but never location. In 2016, a large,...

Bridging History
The Pennsylvania Department of Transportation recently rehabilitated the Frankford Avenue Bridge, also known as the Pennypack Creek Bridge. This stone-arch structure, originally built circa 1697, is the...

Skinny 'Scrapers
Incredibly slender towers are rising around the globe into the skylines of major cities, especially New York City. Often targeted at the wealthy who are able to pay astronomical price for spectacular views,...

A Landmark's Legacy

Originality Built In
The new Goethals Bridge linking New Jersey and New York is a twin cable-stayed crossing that incorporates an innovative cable-stayed anchor in its towers, which angle outward to keep melting in off the...

Making It Work: Up and Over
Located at the heart of Salt Lake City's financial district, 111 Main is a 24-story, 501,455 sq ft Class A office tower that anchors a larger urban redevelopment project in the area....

Double Duty: Approach Structures
The new Sarah Mildred Long Bridge, which connects the cities of Kittery, Maine, and Portsmouth, New Hampshire, features precast, posttensioned concrete, segmental box girder approaches in a stacked configuration...

Making It Work: Nontraditional Answers
One thousand Museum introduces a bold, new silhouette to the Miami skyline and has quickly become one of the highest-profile developments in the United States....

Unexpected Delay (part of "Transformative Tunnel")
The biggest project risk in Washington State's new State Route 99 tunnel was at the south end, where the tunnel begins. If the tunnel boring machine (TBM) could tunnel through that initial zone problem-free,...

Preserving the Rotunda (part of "Restored & Revived")
Over the years, rainwater had leaked through joints in the dome and roof of the Minnesota State Capitol, damaging the stone, plaster, windows, and decorative paint in the building's vast and gorgeous rotunda....

Fresh Air and Clean Energy (part of "Restored & Revived")
As the HGA design team rethought every aspect of the Minnesota State Capitol, it kept in mind the need to make the 100-plus-year-old structure as energy efficient as possible while still maintaining comfort...

Designed for Durability
The Marc Basnight Bridge completed in February, carries North Carolina Highway 12 over the Oregon Inlet, an area that is one of the most dynamic and dangerous inlets on the Atlantic Coast. At 2.8 mi long,...

Doubling Down on History
The developers of a casino in Springfield, Massachusetts, preserved the facades, ornaments, and structural elements of several historical buildings—including a hotel visited by James K. Polk, the 15th...

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...

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...

A Good Cause for a Causeway: How Geotechnology and Project Delivery Restored a Roadway Embankment Crossing a Historically Challenging Soft Ground Site
As part of a Minnesota Department of Transportation (MnDOT) design-build project, a causeway was constructed in 2017 to replace an aging bridge in the southwest metropolitan area of Minneapolis. The causeway...

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...

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...

 

 

 

 

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