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Final Environmental Impact Report - Whittier Bridge/I-95 ...

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Paul J. Diodati<br />

Director<br />

December 9, 2011<br />

Commonwealth of Massachusetts<br />

Division of Marine Fisheries<br />

251 Causeway Street, Suite 400<br />

Boston, Massachusetts 02114<br />

(617)626-1520<br />

fax (617)626-1509<br />

Mr. Kevin Kotelly<br />

US Army Corps of Engineers<br />

696 Virginia Road<br />

Concord, MA 01742<br />

Re: NAE-2009-361<br />

Dear Mr. Kotelly:<br />

The Division of Marine Fisheries (MarineFisheries) has reviewed the GP Cat II Application for<br />

the <strong>Whittier</strong> <strong>Bridge</strong> Replacement Project on the Merrimack River in the Town of Amesbury and<br />

City of Newburyport. MarineFisheries has reviewed project plans with respect to potential<br />

impacts to marine fisheries resources and habitat. The proposed project consists of the<br />

replacement of the existing <strong>Whittier</strong> <strong>Bridge</strong> with two independent parallel bridges. In-water work<br />

will occur within cofferdams.<br />

This section of the Merrimack River provides passage and foraging habitat for a variety of<br />

diadromous fish species including alewife (Alosa pseudoharengus), blueback herring (Alosa<br />

aestivalis), American eel (Anguilla rostrata), American shad (Alosa sapidissima), rainbow smelt<br />

(Osmerus mordax), white perch (Morone americana), lamprey (Petromyzon marinus), gizzard<br />

shad (Dorosoma cepedianum), Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus), and<br />

shortnose sturgeon (Acipenser brevirostrum). The Merrimack River also provides habitat for<br />

hatchery-raised smolts, juveniles, and retired adult broodstock of Atlantic salmon (Salmo salar)<br />

[1]. Sections of the project area also contain salt marsh, an important habitat for a variety of fish<br />

and invertebrate species [2].<br />

MarineFisheries offers the following comments for your consideration:<br />

Deval Patrick<br />

Governor<br />

Timothy P. Murray<br />

Lt. Governor<br />

Richard K. Sullivan, Jr.<br />

Secretary<br />

Mary B. Griffin<br />

Commissioner<br />

• MarineFisheries previously recommended in a letter dated September 8, 2011 that the<br />

installation and removal of the cofferdams occur outside of the March 1 to November 1<br />

time-of-year (TOY) restriction period. This recommendation was designed to ensure safe<br />

passage for a variety of diadromous fish species including American shad (Alosa<br />

sapidissima), Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus), and shortnose sturgeon<br />

(Acipenser brevirostrum). Based on additional project information, cofferdam installation<br />

will be staged to reduce impact by only installing a single cofferdam at any given time. By<br />

avoiding simultaneous installation of multiple cofferdams, this project design would limit<br />

the area of impact to less than 5 % of the river width at any given time. This staging<br />

approach combined with the nature of the river bottom at the project site (predominantly<br />

bedrock) should allow for safe passage of diadromous fishes during the construction

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