The General Dynamics Electric Boat South Yard Assembly Building is a new main assembly building and an integral part in the construction of nuclear-powered submarines for this major defense contractor. As part of this project, Manafort Brothers, Inc. was selected by AECOM Construction, Inc. to perform the civil, utility, precast concrete structure grouting, railroad track work, and site cast-in-place concrete work for the new 190,000 SF building. Located in Groton, Connecticut, the South Yard Assembly Building is now a key facility for large-scale submarine module assembly, advanced systems integration, and efficient manufacturing and testing.
Manafort’s civil and utility scope included site clearing, support of excavation, structural rock excavation, segmental retaining walls, as well as drainage, sanitary, and water utility installations for the assembly building project. Manafort installed a new railroad track and switches interconnecting with the existing rail lines through the ship building facility. Manafort’s concrete scope included substantial grouting of the precast pile caps, panel slab perimeter joints, and pile plugs.
Manafort self performed all of the civil & utility and concrete work while extensively coordinating with the entire project team to successfully complete the project safely, successfully, on-time, and on-budget.
Located along the Providence River at the Port of Providence, RI the McInnis Cement Terminal was the first US Terminal for Canada based cement manufacturer, McInnis Cement. This cement terminal has the capacity to serve the New England Construction Market with its distribution of cement products to Rhode Island, Massachusetts, and Connecticut from this convenient terminal location. Manafort Brothers, Inc. was selected to perform the civil & utility as well as concrete scope of work for the expansion of this cement terminal.
Manafort’s civil & utility scope of work included structural excavation for new dome silo storage facility and associated support frames as well as site preparation for the new electrical equipment building and cement loadout structure. The dome silo measured 134 feet in diameter and has the capacity of storing 40,000 tons of cement.
In addition, Manafort performed the storm drainage upgrades, electrical service connection, and installed the new transformer pad for the cement terminal expansion. The site finishes included curbing, asphalt pavement, pavement markings, signage, and fencing. Manafort’s concrete scope of work included construction of cast in place concrete foundations for the new dome silo, electrical equipment building, and load-out structure.
Manafort’s extensive civil and concrete work experience led to the safe, successful, on-time, and on-budget completion of this project.
CTDOT Project 0102-0348 – Yankee Doodle Bridge and I-95 over Norwalk River and Hendricks Avenue was a bridge rehabilitation project along I-95 over the Norwalk River in Norwalk, CT. The existing 7-span- 911 foot-long and 8-vehicle lane structure was built over the river in 1958 and was in need of functional and structural updates. This major bridge rehabilitation project upgraded the bridge from a “Poor” rating prior to construction. Given the size of the structure, this improvement had a very positive impact on Connecticut’s bridge program.
The superstructure consisted of built-up welded steel plate girders and the substructure consisted of cast-in-place concrete abutments and piers. The proposed rehabilitation included major repair and complete painting of the deteriorated and deficient structural steel members, replacing deck expansion joints, repair of the bridge deck and substructure concrete, stabilization of the west abutment embankment and installation of a sedimentation pond, removal and replacement of the concrete parapets and median deck/barrier, maintenance and rehabilitation of the existing sidewalk, replacement of the bridge drainage, new navigational lighting, and upgrades to existing roadside elements.
Manafort’s creative approach to substructure repair work allowed for it to be completed without river channel closures below the bridge which minimized the impact on the local marine industry and promoted a positive relationship with the community. Given the proximity to the Norwalk River, environmental compliance was also of great importance. All blast media and debris associated with the preparation and new steel coating was contained, collected, removed, and properly disposed of.
All work was completed safely, successfully, on-time, and on-budget in partnership and close coordination with the CTDOT.
The Portsmouth Naval Shipyard is responsible for the overhaul, repair, and modernization of US Navy submarines. Established in 1800, it is the Navy’s oldest continuously operating shipyard. Manafort-Precision was selected to perform the Architectural and Structural Concrete work for the creation of a consolidated, state-of-the-art industrial material handling facility to streamline the flow of critical submarine components during ship overhaul evolutions.
This Energy Conservation and Structural Repair project included the installation of cast-in-place concrete foundations and slabs, as well as concrete slab replacement of the former Naval Shipways Building No. 178.
Critical to the overall success of this challenging project was the required use of a specially formulated marine concrete mix design. Manafort created trial mixes using various percentages of admixture dosages and corrosion inhibitor, and evaluated and selected the final marine mix design.
Manafort provided all labor, materials, and equipment to complete the concrete scope of work for this project, including scheduling and coordinating work within an active military environment. Despite the many design and logistic challenges, all work was successfully coordinated and safely completed on time and within budget.
