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United Water New York Haverstraw Water Supply Project (Desal Plant)


United Water New York's (UWNY) services and rates to customers are regulated by the New York State Public Service Commission. An Order issued by the Public Service Commission on December 14, 2006, and an Order issued by the Public Service Commission on July 20, 2010 that continued the obligations of the previous Order, require UWNY to increase the average water supply for Rockland County by a total of 1.5 MGD, and to increase the peak supply by a total of 7.1 MGD by the end of 2015. The Orders also require that UWNY build and operate a long-term major water supply project that will provide additional water to meet the needs of Rockland County beyond 2015. The proposed project, the Haverstraw Water Supply Project, is UWNY's proposed alternative to meeting the requirements of the 2006 and 2010 Orders to build and operate a long-term water supply project.

Project Description

The project, consisting of the three primary components, will be located in the Town of Haverstraw, Rockland County. The three primary components of the project are the water intake structure, the onshore pumping station and the water treatment plant.

The water intake structure will be located in Haverstraw Bay on the Hudson River and will consist of five wedgewire screens. A 3,000-square-foot onshore intake pumping station and raw water transmission main will be constructed to pump the water withdrawn from the Hudson River to the water treatment plant. The water treatment plant will consist of an integrated series of interconnected buildings to accommodate the equipment necessary for a multi-step water treatment process. The water treatment facilities will include pretreatment for solids removal, filtration, reverse osmosis, and finished water storage. From the water treatment plant, new water main connections would allow distribution of the finished water to United Water's water system.

Review Process and Document Availability

The Department is serving as the Lead Agency for the environmental review of the project pursuant to SEQR. The Department's permit authority for the project includes: a SPDES permit for the discharge of the treated wastewater; a Water Supply permit for development of a new water supply source; an Excavation & Fill permit for the installation of the intake structure; and a Water Quality Certificate for the installation the intake structure and for the potential impact to federal wetlands in the upland portions of the project.

On January 18, 2012 the Department issued a Combined Notice of Complete Application and Notice of Acceptance of the Draft Environmental Impact Statement, Public Hearing and Public Comment Period. Below are the relevant documents as well as website where the larger documents can be viewed online.

United Water Combined Notice of Complete Application and Notice of Acceptance of DEIS, Public Hearing and Public Comment Period (PDF) (74 KB)

Supplemental Public Notice (PDF) (242 KB) - Extension of Public Comment Period and NEW Public Hearing Date

Water Supply Final SPDES Permit (PDF) (231 KB)

Fact Sheet - Draft State Pollutant Discharge Elimination Permit (PDF) (148 KB)

Draft Water Supply, Excavation & Fill Permit and Water Quality Certificate (PDF) (35 KB)

Water Supply Project Positive Declaration (PDF) (31 KB)

Water Supply Final Scoping Document (PDF) (92 KB)

The applications for the above referenced permit and the DEIS can be accessed at the following website:

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