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Town of Greenwich, Connecticut Department of Public Works seeks permit to remove pond sediment, reduce erosion

Published Dec. 13, 2016

Release No. 2016-117


CONCORD, Mass.The town of Greenwich, Connecticut Department of Public Works is seeking a permit from the U.S. Army Corps of Engineers, New England District to impact waters of the U.S. in conjunction with a project to remove pond sediment and reduce erosion in Greenwich, Conn. The work is proposed in Binney Park Pond/Cider Mill Brook at the intersection of South Beach Avenue and Laddins Rock Road in Greenwich.


The purpose of the proposed work is removal of accumulated sediment to arrest shoreline erosion and restore water quality and functional recreational use of the pond.


The proposed work involves the placement of fill and grading below ordinary high water (OHW) for construction of two sediment forebays totaling 16,000 square feet and deepening of the recreational pond to design grades. The proposed improvement will result in the fill/alteration of 1,315 square feet of palustrine emergent fringe wetland and indirect impact over 139,392 square feet (3.2 acres) below OHW associated with the excavation of 9,500 cubic yards of sediment and grading.


The excavated material will be dewatered within the pond or on adjacent upland areas within the park and reused in upland areas on site or disposed of elsewhere in an approved upland location. Although deepening is expected to be completed with mechanical methods (backhoe), it may occur either hydraulically or mechanically, as determined by the contractor.


If a temporary construction bypass is required it will be designed to exceed a flow of 2 cubic feet per second daily flow. The project also will include maintenance of an existing flow control weir (normal surface elevation of 1.5 feet), construction of an identical flow control weir between the two pond catchments, rock toe stabilization and upper bank revegetation along 650 linear feet of shoreline and fiber roll toe stabilization over 100 linear feet of shoreline.


The application for the federal permit was filed with the Corps in compliance with Section 404 of the Clean Water Act, which regulates the discharge or fill of material in U.S. waters, including wetlands. The public notice can be viewed at: www.nae.usace.army.mil/Missions/Regulatory/PublicNotices.aspx.


Public comments on the proposed work (file #NAE-2016-01686) should be forwarded no later than Jan. 13, 2017 to the U.S. Army Corps of Engineers, New England District, Regulatory Division (ATTN: Cori Rose), 696 Virginia Road, Concord, MA  01742-2751. Additional information is available from Permit Project Manager Cori Rose at 978-318-8306 or toll free 800-343-4789 or 800-362-4367 (if calling from within Massachusetts) or by email to: cori.m.rose@usace.army.mil.

Tim Dugan

Release no. 16-055