The U.S. Army Corps of Engineers, New England District is proposing to perform maintenance dredging of the Rye Harbor Federal navigation project (FNP) in Rye, New Hampshire.
The state of New Hampshire is the local sponsor and has requested this dredging.
Rye Harbor is a small, 40-acre estuarine embayment located approximately five miles south of Portsmouth Harbor and 13 miles north of the Merrimack River.
The Rye Harbor FNP consists of a channel that is 100 feet wide and 10 feet deep at mean lower low water, extending 600 feet through the entrance between the outer breakwaters and then becoming 8 feet deep for another 1,700 feet to the state pier and boat ramp in the inner harbor.
“Hyrdographic surveys have shown severe shoaling within the Federal channel and the associated anchorages since the previous maintenance dredging in 1990, creating a hazard to vessels using Rye Harbor,” said Project Manager Mr. Michael Walsh, of the Corps’ New England District, Programs/Project Management Division in Concord, Mass. “Maintenance dredging would require the removal of 50,000 cubic yards of silt and fine-sand, to bring the Federal navigation project to its authorized dimensions.”
Dredging will be performed during a 3-4 month period between Nov. 1 and April 30, during the year or years in which funds become available. The dredge material has been determined to be suitable for unconfined open-water placement and will be placed by scow at either the Isles of Shoals North Disposal Site or the Cape Arundel Disposal Site.
Public comments on this proposed dredging project should be forwarded to the U.S. Army Corps of Engineers, New England District, Programs/Project Management Division no later than March 27, 2019.