Regional Plan Association and Brooklyn Greenway Initiative today released their West Street Sustainable Stormwater Study. The study was developed in collaboration with WE Design and funded by the New York Community Trust. The report evaluated a variety of techniques to use the planned Brooklyn Waterfront Greenway as a means of stormwater detention, cleansing and diversion from New York City's sewer infrastructure. While the Study recommends a specific green infrastructure for managing stormwater along West Street in Greenpoint; the design is adaptable for the entire length of the planned 14-mile Brooklyn Waterfront Greenway.
The plan identifies a three-phase process to capture and treat stormwater from the adjoining storm-watershed by using "treatment trains" that removes stormwater from the City's sewer infrastructure through a series of surface "gardens" and either stores it in those gardens or moves it along to street end "wet" parks. If implemented, such sustainable stormwater systems would eliminate 80% of the combined sewer overflow (CSO) events in the areas. Under the City's current system of combining sanitary sewers with stormwater, rainfall of as little as .5 inch will trigger direct discharge of sewage into New York Harbor. New York City's own 2009 Sustainable Stormwater Management Plan concludes that such using in-street treatment is amongst the most cost-effective means to reduce CSO events. Download the Report Download the Appendix