RXR Village Square Culvert Replacement
Glen Cove, NY
- Installation of a newly aligned drainage line
- Existing Concrete culvert removal
- Operation of storm water bypass pumping
- Construction dewatering and treatment
- Installation of sheet piles and the utilization of a trench box and a slide rail box
RXR developed a parcel of land in downtown Glen Cove for a mixed use building. After construction commenced, an existing active concrete culvert running through the property was discovered. RXR hired Posillico to divert the culvert, remove the existing 5’x4′ culvert and replace it in a new alignment with a 60″ drainage line. Additionally, new bypass manholes were installed and connected to the existing culvert while performing bypass pumping to maintain water flow. Another aspect of the project included the installation of a 42” drainage line as well its accompanying storm trap drainage unit. Posillico performed construction dewatering and treatment to enable deep excavation and utility installation below the ground water table.
WHAT MADE THIS JOB COMPLEX
The continuous flow of water through the culvert made the job complex. Consequently, the deep excavation with heavy water flow was affected further due to rainwater, which had to be redirected/bypassed. The site’s high ground water table required dewatering as well.
HOW POSILLICO SOLVED IT
Posillico’s team solved the complexities of this job by working with the RXR team to streamline the design and avoid constructability issues. Posillico also designed and installed a multi approach SOE system that allowed for deep excavation along sensitive structures. This included the utilization of a trench box during the installation of the pipe, sheet piles and the utilization of a slide rail box for the installation of manholes. The team designed and operated the water treatment system that treated the water generated from the dewatering process prior to its discharge into the storm sewer system.