Case Studies

Panels were put in place to prepare for cast-in-place pour

Panels were put in place to prepare for cast-in-place pour

A partially filled concrete grid bridge deck was selected as a major component of the solution for the lightweight superstructure replacement on I-895 over Patapsco River Flats for the Maryland Transportation Authority (MDTA).   Rummel, Klepper & Kahl LLP (RK&K) of Baltimore secured the...
Completed column and pier cap

Completed column and pier cap

The South Carolina Department of Transportation (SCDOT) found corrosion-related deterioration of the pier caps and columns supporting the Butler Road bridge over I-385 in Greenville, S.C., during a routine inspection. The corrosion was caught early enough and was limited to only one column and a...
41st Street Pedestrian Bridge in Chicago
This summer, a curving blue metal structure under construction along Chicago’s lake shore captured the attention of residents and local media because of its resemblance to a roller coaster. Had some enterprising amusement company chosen to build a thrill ride along Lake Michigan? Turns out that the...
RoadQuake TPRS deployed in work zones reduce crashes and save lives

RoadQuake TPRS deployed in work zones reduce crashes and save lives

On February 8, 2017, KTVN TV reported a fatal work-zone crash:   “…a 2006 black Freightliner semi was traveling southbound where it was approaching traffic being halted by a flagger in a construction zone. [Nevada Highway Patrol] says a 2000 red Ford F-150, 2015 white Toyota 4Runner, and 2007 beige...
Adjustable risers improve paving in Milwaukee
Stark Asphalt, headquartered in Milwaukee, is one of Wisconsin’s largest and most progressive paving firms. It has been in business for more than 50 years, operates four asphalt drum mix facilities and, in 2011, completed the single largest asphalt paving contract in the history of the Wisconsin...
EarthCam software
Building a bridge is a complex process, and deconstructing one as intricate as the Goethals Bridge spanning the Arthur Kill between Elizabeth, N.J., and Staten Island, N.Y., is equally as complicated. The deconstruction process required reversing the order of the original bridge’s construction. The...
Completed CC8 invert rehab, with sealed edges
On highway M-20, east of New Era, Mich., a 70-ft metal plate arch culvert was experiencing moderate to severe section loss in the invert from corrosion and abrasion. The steep decline in condition due to corrosion was attributed to the intermittently flowing creek and the invert’s frequent exposure...
ALL Crane
It is often said that football is a game of inches. So is using two cranes to set 120,000-lb bridge beams.   “With those final, exacting adjustments, you absolutely must have selected the right machines and the most experienced operators,” said Edwin Suazo, project coordinator for ALL Sunshine...
WV Turnpike ABC
The West Virginia Turnpike, an 88-mile four-lane toll road including stretches of I-77 and I-64, is a winding and elevated highway through mountainous terrain. There are 116 bridges on the Turnpike, and prior to 2016, the average bridge age was 32 years old. In 2016, the Turnpike commenced a...
ET Simonds manhole
Since 2006, adjustable manhole risers have been just right for a project detail that had previously been a bit of a hassle for E.T. Simonds Construction Company in Carbondale, Ill. “We do all sorts of road-related work, and of course we do a lot of paving jobs that require the raising of manholes...
Stabilization & the harmonious blending of highway interchange slopes
The Interstate 90 Bridge over the Mississippi River between La Crosse, Wis., and La Crescent, Minn., is a heavily used commuter route and part of the longest interstate highway—I-90—in the country, spanning from coast to coast and providing important commercial and defense infrastructure for the...
Manhole riser in Jefferson County, Ala.
Home to Birmingham, and more than 660,000 residents, Jefferson County is Alabama’s most populous county. The sewer network the county maintains includes 3,600 miles of pipe and 80,000 manholes. That last figure represents a sizable amount of annual maintenance; though manholes themselves are...
Cranes on Pittsburgh highway project
As a certain saying reminds us, functioning smoothly and efficiently requires the left hand to know what the right hand is doing. So imagine how critical it is for two cranes to work together seamlessly when combining efforts on a pick. Such was the case on a 13-mile phase of the colossal Southern...
Forth Bridge Queensferry Crossing under construction

Forth Bridge Queensferry Crossing under construction.

The Queensferry Crossing near Edinburgh, Scotland, is the longest cable-stayed bridge in the world at more than 8,500 ft. It is one of the largest infrastructure projects in Europe, and it benefited from advanced reinforcement planning in 3D provided by the engineers from Leonhardt, Andrä und...
RAPTOR demonstrates TPRS deployment at PTC

RAPTOR demonstrates TPRS deployment at PTC

Traffic engineers at the Pennsylvania Turnpike Commission (PTC) first tested RoadQuake 2F Temporary Portable Rumble Strips (TPRS) in live work zones in September and October of 2015. Their goal was to determine if TPRS arrays would increase driver awareness and alertness in their work zones.  ...
Mountrail County Rte. 6
Eric Urness, P.E., central regional vice president with Interstate Engineering in Mandan, N.D., was working on plans to reconstruct a 11.5-mile section of BIA Rte. 6 from 86th Ave. to 31st Street in Mountrail County, N.D. Due to the recent growth of the oil industry in this area there has been a...
The Carroll Avenue Bridge in Takoma Park, Md.

The Carroll Avenue Bridge in Takoma Park, Md.

Historically and visually impressive, the S.R. 195 (Carroll Avenue) bridge is a three-span, 224-ft structure that crosses the Sligo Creek Parkway, Sligo Creek and the Sligo Creek Trail in Takoma Park, Md.   The origins of the S.R. 195 bridge began in 1878 with a humble, low-lying wooden bridge that...
With Allplan Engineering 2018 engineers can conveniently generate a 3D model of the reinforcement of double-curved supporting structures with varying cross-sections

With Allplan Engineering, 2018 engineers can conveniently generate a 3D model of the reinforcement of double-curved supporting structures with varying cross-sections.

With an arched span of 869 ft, a superstructure length of 1,369 ft and a height of 772 ft above the valley floor, the Tamina Bridge—planned by the engineering office Leonhardt, Andrä und Partner (LAP)—is the largest arched bridge in Switzerland. LAP used Allplan Engineering to create the structural...
Milwaukee road adjustable risers
Several years ago, the city of Milwaukee was experiencing issues with their cast-iron manhole risers installed throughout the area. “They’re usually fine, but on occasion they would slip or rattle out, and that led to car damage and claims—there was definitely room for improvement,” said Milwaukee’...
Hill & Smith steel barriers 1
Alkali-silica reaction (ASR), commonly known as “concrete cancer,” is a chemical reaction that can wreak havoc on concrete structures and accelerate deterioration. This corrosive force is quite prevalent in concrete bridge rails and can cause a number of issues, such as negatively affecting the...
Overlay Init