Corps of Engineers Proposes Cohasset Maintenance Dredging

At the request of the town of Cohasset, the U.S. Army Corps of Engineers, New England District, is proposing urgently-needed maintenance dredging of the Cohasset Harbor Federal Navigation Project (FNP) in Cohasset and Scituate, Mass.

The town of Cohasset is the local sponsor.

The immediate proposed work involves dredging of an area in the Cohasset Harbor entrance channel that was not dredged during the fall 2015/winter 2016 maintenance cycle.

“The shoal within the channel is approximately 0.75 acres in size and consists of about 4,000 cubic yards of material,” said Project Manager Craig Martin, of the Corps’ New England District, Programs/Project Management Division in Concord, Mass.

“The shoal and the strong currents are creating a serious navigational hazard to vessels entering or leaving the harbor and increasing the risk of grounding.”

Additionally, other areas of the entrance channel and a section of the northern corner of the 7-foot anchorage by the breakwater were not cleared to authorized depths.

In total, approximately 9,000 cubic yards of material in the entrance channel and 7-foot anchorage and 11,000 cubic yards at the entrance to Bailey Creek still need to be removed.

Due to the urgent nature of the work on the entrance channel shoal, the Corps is proposing to use the Government-owned special purpose hopper dredge Currituck or mechanical dredge to remove the 4,000 cubic yards of hazardous shoal in the entrance channel over a 2-week period during May 2016.

Any remaining sediment in the entrance channel, the 7-foot anchorage, and entrance to Bailey Creek Shoals will be dredged using a mechanical dredge over an 8 to 10 week period between November 1 and January 31.

All dredged material will be transported to the previously used nearshore placement site adjacent to Green Harbor Beach in Marshfield, Mass.

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