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Skanska managed New York City’s $493 million upgrade to its largest wastewater treatment plant.The Newtown Creek Water Pollution Control Plant expanded capacity from 1.2 million to 1.8 million cubic meters per day, a 50 percent increase. The quality of the treatment was also improved by adding eight treatment areas to increase the removal of biochemical oxygen demand from 60 percent to 85 percent. The improvements brought New York City into compliance with the Federal Clean Water Act.The scope of the project included:· building a new North Battery of eight aeration/sedimentation tanks with a new corresponding grit gallery· demolishing and reconstructing four aeration/sedimentation/grit tanks in the Central Battery· modifying the remaining four aeration/sedimentation/grit tanks in the Central Battery and eight aeration/sedimentation/grit tanks in the South Battery· construction of a North Control Building · modifying pre-existing elements to integrate old and new plant components · installation of 96-inch concrete encased steel pipes · installation of 60-inch concrete encased steel pipes· procurement and installation of nine process air blowers · completion of utility work, including an extensive electrical system upgrade· installation of an 84-inch and an 96-inch stainless steel pipe on new support towers· upgrade odor control system with aluminum tank covers The project team was limited to removing from service only two of the existing tanks at one time. There were five intermediate milestones over the life of the project, increasing the demand for proper organization and scheduling.
Beth MillerVice President, CommunicationsSkanska USA Inc.+1 917 438 4523
E-mail Beth Miller
Market segment: Waste treatment