Environmental review is underway for the proposed construction of a combined sewer overflow tunnel serving Newtown Creek.

The Newtown Creek Superfund Site Study Area on the border of Brooklyn and Queens is comprised of the water and sediment of Newtown Creek, and New York City is under order by New York State to implement a Combined Sewer Overflow Long-Term Control Plan approved in 2018. The construction of a CSO storage tunnel aims to reduce the volume of future discharges to the creek by over 60%.

AKRF is leading the preparation of a SEQRA/CEQR Environmental Impact Statement as part of a consultant team working with the New York City Department of Environmental Protection. The joint venture is led by Delve Underground and Brown and Caldwell.