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Newtown Creek is the largest of New York City's fourteen Wastewater Treatment Plants, processing up to 310 MGD and up to 720 MGD during wet weather.  The "South Battery" process tanks provide grit removal, aerobic processing, and biological settling for one third of the Plant’s wastewater flow. This upgrade included the complete reconstruction of the tanks, construction of a new control building to house process pump equipment, and construction of three new electrical buildings. This project was challenging for its size relative to the location. The CM team had to work closely with contractors to demolish and rebuild 8 acres of process tanks at an active plant in an urban environment.  With no lay down areas available, daily coordination was required to deliver and install over 40,000 feet of pipe, 1,800 structural piles, 50,000 cubic yards of concrete, and 725 tons of structural steel. To  meet a major milestone for placing half of the process tanks in service, it required completing all work in the control building that housed process pump and control equipment.  This achievement involved complex coordination of the four prime contractors. Weekly coordination meetings were held at both field and management levels for the duration of the project in order to coordinate the installation of major equipment simultaneously.