Rye Harbor Dredging Projects

The New England District of the US Army Corps of Engineers will be dredging the Rye Harbor Federal navigation project (FNP) in Rye, New Hampshire.  Dredging operations will commence on or about November 15, 2020 and will conclude on or about March 15, 2021.  The dredged sediments will be placed at the Isles of Shoals North Disposal Site (IOSN) located approximately 13 Nautical Miles from the Rye Harbor FNP.

The dredging contractor is being required to use a specific Haul Route when transiting to and from the dredged material placement site.  The contractor’s designated Haul Route is posted on the Corps’ web page at:

http://www.nae.usace.army.mil/Portals/74/docs/Navigation/Rye-Harbor-Dredging_Haul-Route-to-IOSN.pdf

Individuals seeking additional information regarding this project or having inquiries regarding the loss of fishing gear suspected to be the result of dredged material disposal may contact Prock Marine Company at (207) 594-9565.

Government Project:

The State of New Hampshire proposes maintenance dredging of the Rye Harbor Anchorage to be performed concurrently with the dredging of the Federal Navigation Project (FNP). The purpose of the proposed maintenance dredging is to alleviate shoaling conditions in the anchorage. Placement of dredge material is proposed for either of two open-water placement locations: Cape Arundel Disposal Site (CADS) or Isles of Shoals North Disposal Site (IOSNDS). CADS is located in Maine state waters. The haul route to IOSNDS impacts approximately 6.3 miles of Maine state waters. The CADS haul route impacts approximately 19 miles of Maine state waters.

The proposed dredging requires removal of approximately 9,000 cubic yards of sediments mainly composed of fine sand and silt. This material is proposed to be mechanically dredged (clamshell bucket) and then transported by scow to either of the proposed placement sites. The work will be accomplished over a two to three-month period in concurrence with the dredging of the FNP, within an established dredge window (between November 15 and March 15), in the year(s) in which funds become available.

Private Project:

The Port of Missing Men Trust of 122 and 126 Harbor Road proposes a maintenance dredging project in Rye Harbor between their dock structures. The work is to be performed concurrently with the dredging described above. Placement of dredge material is proposed for either of two open-water placement locations: Cape Arundel Disposal Site (CADS) or Isles of Shoals North Disposal Site (IOSNDS). CADS is located in Maine state waters. The haul route to IOSNDS impacts approximately 6.3 miles of Maine state waters. The CADS haul route impacts approximately 19 miles of Maine state waters.

The proposed dredging requests the removal of approximately 2,750 cubic yards of yards of sediments mainly composed of fine sand and silt to improve the access to the current dock structures to an approximate depth of -6 feet mean low lower water (MLLW) adjacent to the federal navigation channel. This material is proposed to be mechanically dredged (clamshell bucket) and then transported by scow to either of the proposed placement sites. The work will be accomplished in the accordance with timelines described under the “Government Project.”

General questions about the project may be directed to Denis Marc-Nault at 207-592-0521 or denis-marc.nault@maine.gov

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