Careers Contact Us
Contech Design Center mobile

Belmont Park Arena

Elmont, New York


New York Arena Partners


Bohler Engineering


Rutura and Sons


April 2020

Technical Description:

  • CDS® Hydrodynamic Separator

Announced in December 2017, the Belmont Redevelopment Project utilized 43 acres of underutilized parking lots at Belmont Park in Elmont, New York. The new development includes a 19,000-seat arena for the New York Islanders hockey team and other events, a 250-key hotel, a state-of-the-art retail village, and office and community space. Also, the project developers, New York Belmont Partners, improved two local parks in the surrounding community.

Local regulations require pretreatment of 100% of the Water Quality Volume from any drainage areas of new development/new impervious areas that are more than 1 acre. With minimal space (as most of the site is impervious), a hydrodynamic separator was the best choice for meeting the local regulations.

Contech worked directly with Bohler Engineering to verify what type of structure would be required. A Contech Stormwater Design Engineer helped to estimate flow calculations of 13.64 CFS. Considering the flow rates, local regulations, available footprint, and costs, engineers specified a 10-foot diameter CDS hydrodynamic separator for the site.

The site conditions for this project were unique. A collection manhole was required upstream of the CDS so that a single pipe inlet could be utilized. Also, the structure itself had a deeper than standard rim to invert elevation (8.69' from rim to invert out). This required custom-made sections for the CDS unit.

Contech worked diligently with the engineer to provide the calculations for the water quality flow required to meet the pretreatment requirements of the New York State Department of Environmental Conservation. Contech also expedited the delivery of the system to meet the project's deadline. Once the unit arrived, a Contech Field Operations Team member was on-site to install the internal components of the 10-foot diameter CDS unit.

Technical Description:

  • CDS® Hydrodynamic Separator

800-338-1122 |

© 2022 Contech Engineered Solutions LLC, a QUIKRETE Company