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Case Studies

Construction crew member adjusting concrete final grade on a manhole riser. 

State Highway 183, from Euless to Dallas/Fort Worth, Texas, underwent a major reconstruction in 2014, a project totaling $1.6 billion. On projects of this size, even small changes can lead to a great deal of extra work, and such was the case when an unexpected grade change was required to correct...

Pulleys placed in position with the saw on top.

Precision Cutting & Coring of Kansas City, Kan., was contracted for a bridge overhaul project in May 2014 that required strict timing and precision. The overall project involved demolishing the top part of an old rail bridge then reconstructing it. Precision’s scope of work was to saw and...

CENTRA chose a Redi-Rock reinforced retaining wall to upgrade its bus depot facilities and create more space for parking.

THE CHALLENGE: Along U.S. Route 50 in Clarksburg, W.Va., stood a decaying, unusable bus depot. This depot was located adjacent to a bridge, with access into the depot coming directly off the bridge.   In 2014, the Central West Virginia Transit Authority (CENTRA) needed to upgrade its bus depot...
Built in 1956 to replace the original Cold War-era swing bridge in the location, the Cuyahoga River Bridge #1 is a steel vertical-lift bridge sometimes referred to as the “Iron Curtain”—likely due to its gateway-like location and vertical design. The 267-ft-long Iron Curtain is the last bridge that...

Workers in Wisconsin load the briner maker.

A few years ago, the City of Wauwatosa implemented a brine program for anti-icing and pre-wetting salt. As a pilot program, city officials were cautious when it came to investing in the upfront costs for an in-house brine maker without first seeing the results. Rather than batch their own brine,...
Most transportation agencies now use construction cameras to capture project views, keeping their teams and the public up-to-date in real time. As webcams evolve, each new version introduces higher-quality, more versatile tools. Project teams are realizing the benefits of using panoramic...

N-Line crew installs an array of RoadQuake 2F Folding Temporary Portable Rumble Strips.

In the last few years, the Texas Department of Transportation (TxDOT) has implemented several safety initiatives to enhance safety in work zones for both drivers and workers.   As one of those safety initiatives, TxDOT added temporary portable rumble strips (TPRS) to lane closures, effective with...

The deicer flows freely without clumping.

While it may encompass just 25 lane miles, Rutland Township takes its winter maintenance responsibilities seriously. That’s why Jay Schultz, highway commissioner for the western Chicago suburb, made finding the right road deicer a top priority.   “I’ve tried spraying salt with calcium chloride, I’...
The Nicollet County (Minn.) Highway Department needed to repair transverse cracks on County Road 13. This two-lane road has annual traffic of 302,950 vehicles, including large tractor-trailers. In addition to traffic, the fluctuating Minnesota weather plays a factor in creating pavement distresses...

Vertical Redi-Rock walls support the roadway above.  

How do you support roadways when you’re contending with massive live loads? Engineers designing a new roadway for a winery were faced with this challenge on a recent project. The roadway needed to be located at the top of a 19 ft high retaining wall, which allowed trucks to unload grapes directly...

A TxDOT herbicide truck sprays a guardrail where weeds are encroaching.

Many may not realize what an attraction the spring wildflower bloom is in Texas—or even that the state has such an impressive wildflower crop. But each spring, throngs of those in the know flock all over the state to get a glimpse of fields swathed in bright colors like flame orange, yellow, blue...
Arizona is known for its vast deserts and arid climates—not necessarily torrential rain. But when it does rain in the southwestern state, the combination of the amount and the speed at which it falls can cause flash floods. The shores of Lake Havasu—a valley destination for flash flood waters—are...

The city of Lowell, Mass., is cutting salt use by installing a new electronic spreader control system on its snowplow trucks. 

Before installing electronic spreader controls on its snowplow trucks, the Lowell, Mass., Department of Public Works (DPW) was applying tons of salt on city streets for each winter storm. “Our operators would typically set their existing manual spreaders to maximum and go, putting down about 1,000...

This image shows the placement of TechCrete into a cavity that has been sawed and blown clean with compressed air. 

The Utah Department of Transportation (UDOT) is always on the lookout for durable solutions for pavement preservation. Degradation caused by natural forces, traffic and other means is a continual challenge for keepers of the infrastructure—they need to treat defects such as surface spalling, panel...

The Thomas Buford Pugh Memorial Bridge replacement project

The Thomas Buford Pugh Memorial Bridge spans the New River Gorge National River on Rte. 41 in the town of Prince, W. Va. The bridge is a two-lane, three-span, through-truss style that carries traffic white-knuckle high over the whitewater New River. One of the oldest rivers in North America and...
Continental Gold, an exploration and development company, established a mining operation in the mountains of Antioquia, Colombia. Situated 940 m (3,084 ft) above sea level, the very complex and steep terrain rendered the area nearly inaccessible for construction equipment that was required to build...

The DuraPatcher provides a permanent repair by spraying a mixture of emulsion-coated aggregate with sufficient force to compact the mixture as it is applied in layers.

In the far northern reaches of the continental U.S., pavement maintenance supplies can often be in short supply, depending on the time of year. This can seriously impede pothole patching as asphalt plants close for the winter. The City of Fargo, ND, only 160 miles from Canada, took matters into its...

Workers prepare the Snap-Tite HDPE pipe for slip-insertion.

Aging culverts across the United States are failing at an alarming rate. The cost and inconvenience of digging out and replacing these systems is often unrealistic. In Kansas, the Department of Transportation (KDOT) and Johnson County embarked on a multimillion-dollar highway improvement project...
The scenic U.S. 50 twists and turns its way past Lake Tahoe, Nev. It cuts through mountains, forests and desert valley with steep grades and hairpin turns. Rocky outcrops bound the highway, and a stretch of road between Cave Rock Tunnel and the junction of U.S. 50 and S.R. 28 was in need of repair...

The limestone-textured blocks matched the aesthetic look of the existing bridge pier, and fit in with the natural look of the environment.

In 2013, the town of North Haven, Maine, began construction on a very unique bridge project. The goal was to rebuild a deteriorating bridge that provided access to four seasonal homes and was an important wharf for the local lobster industry.   The town faced several challenges with this project...

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