NYCDEP Green Infrastructure Pilot Program Awarded ACEC-NY Gold Award

With future implementation in mind, a variety of green infrastructure control designs were developed and implemented to work with the unique opportunities available within an ultra-urban environment like New York City.

Bioretention sites typically consist of a shallow, vegetated basin layered on top of an engineered sandy soil mixture, stone drainage, and an underdrain system. These layers serve to effectively capture stormwater then slowly release it over time back into the ground.

By evaluating green infrastructure designs from inception, through construction, and post-construction performance (states illustrated in this photo of NYCHA Bronx River Houses Complex), New York City is gaining invaluable information on the range of benefits these green infrastructure controls may provide.

At the North and South Conduit pilot, a variety of runoff diversion mechanisms were used to route stormwater from surrounding streets and sidewalks to a bioretention system.

At Shoelace Park, a special runoff diversion system and tiered bioretention design were developed to navigate challenges such as diverse existing topography, the prevalence of existing mature trees, and existing sewer lines and pedestrian paths.

(NEW YORK, NY – March 5, 2013) – The American Council of Engineering Companies – New York has bestowed the 2012 Gold Award to the NYCDEP Green Infrastructure Pilot Program.

The New York City Department of Environmental Protection implemented a series of more than 20 pilot projects throughout the city to study the potential benefits of a city-wide green infrastructure program. Using the latest green infrastructure practices and techniques, the pilots have proven to be a successful and cost effective method of handling and reusing stormwater in a large-scale, ultra-urban environment.

The pilots will pave the way for the incorporation of green infrastructure city-wide, reducing the City’s wastewater treatment costs, creating a more sustainable stormwater system, and helping restore natural drainage patterns. The reduction of combined sewer overflow (CSO) events will also greatly improve the water quality of the receiving water bodies.

Monitoring evaluations have shown that these pilots are providing valuable stormwater management benefits, even beyond what was originally anticipated. In many cases, the effect of impervious surfaces on the downstream sewer system is effectively negated, even during larger storm events, and impervious areas larger than originally planned are able to be successfully managed by the green infrastructure controls.

Since our founding in 1951, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater and stormwater collection, treatment, and reuse.

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