AECOM, through its joint venture Newtown Creek CSO Partners—comprising Parsons Corporation and EPC Consultants Inc.—has been selected by the New York City Department of Environmental Protection to provide construction supervision for the city’s first combined sewer overflow storage tunnel and pump station in the Newtown Creek area.
The tunnel will span 3.26 miles and hold 50 million gallons of stormwater and sewage, a capacity designed to reduce combined sewer overflows into Newtown Creek by 60‑70 percent. The project is located on the federally designated Superfund site that has been heavily contaminated by industrial and sewage discharges, making the tunnel a critical component of the city’s long‑term water‑quality and flood‑risk mitigation strategy.
Land acquisition for the tunnel is slated to begin in the third quarter of 2026, with site preparation by the Department of Sanitation in the second quarter of 2028. Tunnel construction is expected to start in late 2029, followed by pump‑station construction in mid‑2032, and final completion projected for 2040.
For AECOM, the contract adds a new revenue stream and reinforces its leadership in large‑scale municipal infrastructure. The company’s Q1 2026 revenue of $3.83 billion and a backlog of $16.1 billion in fiscal 2025 underscore its capacity to absorb and execute projects of this scale, while the win signals continued confidence from city agencies in AECOM’s delivery capabilities.
The project is governed by the 2005 Order on Consent between New York City and the New York State Department of Environmental Conservation, and the 2018 Newtown Creek CSO Long‑Term Control Plan. These regulatory frameworks mandate the tunnel’s construction and provide a clear path for funding and oversight, ensuring that the project aligns with state and federal environmental objectives.
The joint venture’s role will encompass quality control, schedule management, and safety oversight throughout the construction phase, positioning AECOM to capture a share of the long‑term maintenance and operation of the tunnel once it becomes operational.
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