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New York City agreement to reduce CSO
As part of the agreement, the state and city have resolved all outstanding compliance issues associated with the Consent Order. The modified Consent Order requires the city to complete $1.4 billion in cost-effective gray infrastructure substitution projects to improve the city’s collection system performance. These substitute projects will save the city taxpayers $1.4 billion from the original tanks and treatment plant expansions, required by the Consent Order, while providing equivalent water quality benefits.
Examples of green infrastructure projects include: blue roofs and green roofs, which use mechanical devices or vegetation to slow roof water from draining too quickly and overwhelming sewers; porous pavement for parking lots that allows water to seep through it and be absorbed into the ground rather than running-off into the sewer system; tree pits and street side swales for roadways that allow water to pool in underground holding areas until it can dissipate in the ground or transpire through plants; wetlands and swales for parks; and rain barrels in some residential areas.
In connection with the agreement, the DEP has issued a RFP for engineering and design services contracts to develop green infrastructure master plans in three of the city’s combined-sewer areas and in other CSO areas of New York. The DEP expects to award the first RFP response contracts by the summer, with design work to start immediately after.