Replacing an Icon
Since 1852, the Portage Viaduct has carried a rail line across the Genesee River Gorge, near the town of Portageville, New York. First made of timber, then replaced with a wrought iron structure after...

Three Sources, One Quality Product
To keep pace with increasingly stringent regulations and growing demand, Lee County Utilities in southwest Florida recently constructed a new, larger drinking water facility that treats three separate,...

Pipeline Partnership
Working together, two California agencies coordinated their water reuse efforts, facilitating the construction of a single transmission main, rather than the two that were originally planned. This coordination...

Reuse Ramps Up
Water reuse has long been a staple of water providers in arid regions of the United States, especially for nonpotable uses. But facing demands to ensure greater resiliency and sustainability of future...

Infrastructure Solutions: Ports Modernize
ASCE's 2017 Infrastructure Report Card gave ports in the United States a grade of C+, a full grade higher than the nation's overall infrastructure score and a slight improvement over the category's previous...

Reliability-Based Design (RBD) For Everyone: (No Monte Carlo Simulation Required!)
In North America, the design of earth structures for transportation applications is most often carried out using load and resistance factor design (LRFD). In the U.S., the AASHTO LRFD Bridge Design Specifications...

A Faster, Cheaper, Better Way to Build a Wall: How a Simple Highway Widening Led to a Patent
When first opened in 1940, and as segments were later added to it, the Pennsylvania Turnpike (Turnpike) was principally a four-lane highway with two eastbound and two westbound lanes. As traffic volume...

Bridging the Hudson
Replacing New York State's Tappan Zee Bridge involved traversing more than just water; the team also crossed the hurdles of poor foundation conditions and the enormous scale of the crossing. Creative solutions...

Micropiles Support the "Missing Link": Understanding Load Transfer in Challenging Subgrades
Authorized by Congress in 1944, the Foothills National Parkway partly traverses the foothills of the Great Smoky Mountains in Eastern Tennessee. Large sections of the parkway cross high ridges located...

Sandra Houston, PhD, PE, D.GE, M.ASCE

Geo-Resilience By Soil Improvement: Contrasting the Performance of Two Embankments during a Megathrust Mw 7.8 Earthquake
The west coast of Ecuador forms the eastern side of the Pacific "ring of fire" along the Nazca tectonic plate boundary (Figure 1). The epicenter of the Ecuador earthquake on April 16, 2016 (Mw 7.8), was...

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...

Basements On The Beach: Overcoming South Florida's Shoreline Excavation Challenges
The South Florida beachfront is awash with an ever-increasing number of high-rise condominiums. As land becomes scarcer and increasingly expensive, and building regulations change to require above-grade...

We Struck Water! Discovery of Artesian Groundwater Solves A 50-Year-Old Landslide Puzzle
Some unstable slopes fail dramatically, but most can be characterized by gradual, if not monotonously slow, movements. Yet these latter situations can pose a dilemma when a temporary repair is much simpler...

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...

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...

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...

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...

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...

Supporting A National Treasure: Spruce Tree House Alcove Arch Stabilization
Mesa Verse National Park, located in southwestern Colorado, honors the cultural significance of the fantastic cliff dwellings of the Ancestral Pueblo people, who lived in the area from AD 600 to 1300....

 

 

 

 

Return to search