CIVIL CONCRETE

When it comes to civil concrete, STEVENS Engineers & Constructors is your contractor.

Layout, embedded metal, rebar, anchor bolts, mass pours, expansion and construction joints, quality control, curing, additives, water stops, we do it all. With our experience and the professional oversight and support of our CDMG engineers, STEVENS does more than “get it done,” we get it done right.

 

PROJECTS
  • ATI BRACKENRIDGE
    ATI BRACKENRIDGE
    Civil Concrete
  • PPL BRUNNER ISLAND
    PPL BRUNNER ISLAND
    Civil Concrete
  • AES WIND LAUREL MOUNTAIN
    AES WIND LAUREL MOUNTAIN
    Civil Concrete
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ATI BRACKENRIDGE

Location: Brackenridge, Pennsylvania

STEVENS Engineers and Constructors was heavily involved in ATI’s state of the art HRM located in Brackenridge, Pennsylvania.

While primarily based on two large civil foundation packages, STEVENS was also required to excavate an area roughly 300’ wide x 1,100’ long x 20’ deep. STEVENS demoed more than 17,000 cy of old foundation, as well as installed more than 1,100 pounds of sheet pile along with the installation of numerous deep man hole and 36” concrete storm pipe.

At the end of the project, STEVENS had formed and poured more than 89,000 cy of concrete — including embedded metals, anchor bolts and elevated slabs. All of this was done throughout all four seasons, and on an extremely congested site.

Categories :
Civil Concrete
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PPL BRUNNER ISLAND

Location: York Haven, Pennsylvania

STEVENS has been involved in numerous environmental projects in the power industry, including Scrubbers.

One such project was at PPL Brunner Island, where as a subcontractor to Shaw, STEVENS performed 36,500 cy of excavation, 8,000 LF of “H” piles (subcontractor) and 10,500 cy mass pours of foundations.

One of the unique challenges with this project was a specific requirement of 72-degree Fahrenheit temperature for all mass pours. During mid to late August near Harrisburg, Pennsylvania presented a challenge within weeks, due to the temperature regularly rising to the 90-degree Fahrenheit range.

STEVENS utilized many of its resources to complete this project. This started with establishing our own batch plant on site, following by chilling aggregate and substituting ice for water and scheduling the pours to start in the evening and run throughout the night. We had to inject liquid nitrogen at the pour site to meet the 72-degree requirement.

The mass pours averaged 3,500 cy each and numerous tankers of liquid nitrogen. STEVENS successfully placed 10,500 cy of concrete per specification, along with an additional 11,000 cy that were not mass pour.

Categories :
Civil Concrete
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AES WIND LAUREL MOUNTAIN

Location: Elkins, West Virginia

With the constant changes in technology and environmental constraints, STEVENS was excited and pleased to be a part of the Laurel Mountain Wind Farm project as a subcontractor to TVIG.

On this wind farm, STEVENS formed and poured 61 octagon shaped foundations in the mountains of West Virginia. Over a 14 mile, 18’ wide one-way access/exit road, with approximately 15-degree grade, STEVENS poured mud matts ranging from 25-50 yards to establish grade.

STEVENS would later install 22 tons of rebar and 10,000 pound bolt cage using 40 ton and 60 ton hydraulic cranes. Then using a 1100’ belt conveyor, they poured 250 cy of concrete, followed by another 30 cy for the pedestal. This was a difficult job, performed mostly through winter months.

Categories :
Civil Concrete