New Bedford Harbor Superfund Site
Final Dredge Plan Designs

After more than 40 years of studies, planning, design and remediation, in 2020, the final subtidal dredging necessary to achieve the New Bedford Harbor Superfund Site ROD action levels was on the horizon.

As requested by USEPA and USACE, Lally LLC had the honor of designing the final subtidal dredge plans for New Bedford Harbor Superfund Site. Identified as South of Wood Street (SWS) and Management Units U, V and W, these areas would also employ precision mechanical dredging approaches. With depths of less than 2 ft. at low tide in the channel thalweg, restrictive widths, and several hard bottom areas, the SWS site, located at the very north end of the Upper Harbor posed significant access challenges, evaluated closely during the design phase. The solution was to perform access dredging in order to create a flotation basin at low tide, and to employ a land-based long-reach excavator to assist in removing the areas not accessible by the floating dredge platform. Once coordinated with the RAC Contractor, the final NBHSS subtidal dredging was undertaken and successfully completed.

Specific work executed by Lally LLC under this final phase of the subtidal NBHSS remediation included;

Services Provided

Field Investigations

Sampling and Analysis Plan

Geostatistical Analysis

Dredge Plan Development

Underground Utilities Investigation

Construction Oversight

Quality Assurance and Performance Review

Location

Massachusetts, USA

Period

2019 – 2020

For its work under this contract, Lally Consulting LLC received a Contractor Performance Assessment Reporting Systems (CPARS) rating of Exceptional by the Federal Government.

For its work under USACE Contract W912WJ-18-C-0003, Lally Consulting LLC was nominated by the NBHSS Project Leadership and selected by an awards panel of EPA representatives from across the Agency as the 2020 national recipient of the USEPA Administrator’s Award for Outstanding Accomplishments by a Small Business Contractor.

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