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.