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FACT SHEET-Lake Montauk Harbor Navigation Improvement Project, NY

U.S. Army Corps of Engineers, New York District
Published Jan. 19, 2023
Updated: May 17, 2022

DESCRIPTION: Lake Montauk Harbor is located on the south fork of eastern Long Island, Suffolk County, NY. The harbor opens to the north into Block Island Sound through an inlet stabilized by two jetties. The existing Federal project at Lake Montauk Harbor provides for: a channel 12 feet deep at MLLW and 150 feet wide, extending about 0.7 miles from the 12 foot contour in Block Island Sound to the same depth in the yacht basin east of Star Island; a boat basin 10 feet deep, 400 feet wide, and 900 feet long, located northwest of Star Island; east and west jetties and; the addition of sport fishing facilities on top of both jetties. Local interests have expressed concerns about inadequate channel depths for the larger commercial fishing vessels and erosion effects in the vicinity of the inlet. The US Coast Guard has also had difficulties due to shoals in responding to emergencies from the station at Lake Montauk Harbor. Sediment transport phenomena, sand bypassing and sand management are issues to be addressed and must focus on both the inlet and adjacent shores. 

AUTHORIZATION: Section 107 of the River and Harbor Act of 1960 as amended (33 U.S.C. Section 577)

STATUS:   A draft feasibility report was completed on the navigation purpose and released for public review in July 2019.  A final report is now approved recommending that the recommended plan to deepen the channel and authorize a deposition basin be implemented under USACE's Continuing Authorities Program, Section 107.  That report was approved in February 2021, and the FONSI was signed in March 2021. A PPA between the Corps and the Town of East Hampton was executed on 28 September 2022. Design is underway, and construction of the deepening project is estimated to take place in the fall of 2023 pending acquisition of real estates for placement of the dredged material west of the inlet.


Mr. Nathanaal Wales 
Project Manager
P: (917) 790-8731
Email: Nathanael.T.Wales@usace.army.mil
U.S. Army Corps of Engineers, New York District
26 Federal Plaza
New York, NY 10278