Located in Bridgewater, MA, the High Street Dam was rated as a Significant Hazard by the MA Office of Dam Safety for impeding migratory fish passage, interrupting natural river processes, and contributing to local flooding. Manafort Transit was selected to remove the existing 12 ft high and 80 ft wide dam across the Town River and replace the 170 year old High Street Bridge to withstand 500-year floods.
Manafort’s demolition scope included the design and installation of a temporary cofferdam, consisting of 3,000 lb sandbags, to temporarily divert and relocate Town River to facilitate the demolition of the existing dam and appurtenances under fully dewatered conditions. Manafort was required to selectively demolish and salvage portions of the historic dam for re-use on site.
Manafort’s bridge replacement scope included the construction of two new cast in place concrete bridge abutments and wingwalls supported by 3 ft diameter drilled shaft foundations. The new bridge superstructure included structural steel framing and a cast in place concrete deck. In addition, Manafort relocated gas, sanitary sewer, storm drainage, and water main utilities and constructed all site finishes on the project including reprofiling of the river channel, extensive river bank restoration, concrete sidewalks, and bituminous pavement.
The Manafort team’s extensive demolition and construction experience, in addition to close coordination with all project stakeholders and agencies, aided in the environmentally sound, safe, successful , on-time, and on-budget completion of this project.
The Ware River slope stabilization project involved the construction of a new retaining wall to reinforce a failed slope in New Braintree, MA, along the Right-of-way of an active railroad corridor. The original design provided by the client included a drilled soldier pile and precast lagging retaining wall. Manafort worked with the owner and designer and provided a value engineering design that changed the wall to a driven pile with cast-in-place concrete pile cap and precast concrete block retaining wall. With the change in wall type, a credit was issued and approved by the owner.
The project was only accessible by hi-rail equipment so all equipment and materials were transported by Manafort via hi-rail equipment from a nearby grade crossing to the project site. The project consisted of 39 HP 14×89 driven piles, a cast-in-place reinforced pile cap, 2,067 SF RECON block retaining wall, rip rap slope stabilization, and wetland restoration.
Manafort served as Prime Contractor for the project and self-performed a majority of the work, including the driven piles, retaining wall installation, all hi-rail equipment moves, and rip rap slope stabilization.
The Lynn Station is part of the MBTA’s Newburyport/Rockport Commuter Rail system. The Station is an elevated center platform with inbound and outbound tracks. The outbound track was a direct fixation type track, and the concrete holding the direct fixation was past its useful life.
Manafort was contracted by the MBTA’s commuter rail operator, Keolis, to replace the 530 feet of direct fixation track with a ballasted track. Work involved mobilizing and demobilization equipment on hi-rail to the project site, removal of the existing rail, demolition of the concrete slab, installation of ballast, installation of wood railroad ties, re-installation of rail, thermite welding, and destressing of the track. Work was completed during weekend track outages, and the track was returned to the railroad on time at the end of each weekend.
Manafort served as the sole subcontractor for the project and self-performed all work.
Quonset Development Corporation contracted Manafort Transit to demolish an existing seaplane ramp in North Kingston, RI. The work consisted of installation and maintenance of a turbidity barrier around the site, demolishing the 200 ft. long by 50 ft. wide reinforced concrete ramp, which included the extraction of approximately 224 creosoted timber piles, 56 concrete pile caps, concrete beam between pile caps, and the concrete deck structure.
Access to the site from land to the water was not provided by the owner due to site restrictions. As a result, all materials, equipment, and debris had to be transported to and from the site via barges and tugboats.
Manafort served as the Prime Contractor for the project and self-performed all the work.
