MassDOT (MBTA) Inspection and Rating

Green was involved two of MBTA Inspection and Rating Contracts.  For one of the Contracts, Green was responsible for the evaluation and load rating of eighteen (18) bridges on the Middleboro, Gloucester and East Route Maine commuter lines and on the Blue Orange and Red transit lines. On another contract, Green was responsible for the inspection of five (5) bridges and the load rating of seventeen (17) bridges on the Middleboro and West Route Main commuter lines.  Bridge types for these contracts included thru-girder, multi-stringer, prestressed butted beams, reinforced concrete pipe arch, masonry pipe, double box culvert and masonry arch. Inspection and/or Rating reports were created, and short and long-term maintenance and rehabilitation recommendations were made.

MassDOT Bridge Load Rating Contract

Green was selected by the Massachusetts Highway Department (now MassDOT) on this assignment based contract to determine bridge load carrying capacity of MassDOT and municipal owned structures and to develop realistic and practical recommendations addressing structural deficiency or improving load carrying capacity.  As of now, we have been assigned four assignments to perform a load rating for a total of sixteen bridges.  Included in these ratings are ratings of unique structures such as gusset plates rating for a modified Warren truss, rigid frame bridges, box culverts and steel plate pipes. 

MassDOT Footprint Bridge Contracts

Green was contracted by the Massachusetts Highway Department (now MassDOT) for several open-ended bridge contracts since 1992. Green has received continuous contracts since that time completing numerous bridge assignments that continue to the present day.  Projects have included preliminary and final design, seismic analysis, inspection and ratings, detailed bridge reports and recommendations. Throughout the duration of these contracts, the key personnel of Green have interacted with the staff of the Massachusetts Highway Department providing engineering solutions.  Green designed over fifteen new bridges under these contracts. 

MassDOT Route 18 over Taunton River, Bridgewater/Middleborough

The proposed Route 18 Bridge is a two-span continuous structure with an overall length of 45.00 m and an overall width of 14.095 m. The proposed roadway accommodates two 3.75 m travel lanes, two 2.50 m. shoulders, a 2.10 sidewalk on the western side and a 0.495 safety curb on the eastern side of the bridge. The bridge superstructure was constructed using eight steel rolled beams composite with a 200 mm concrete deck. The proposed substructure consists of two new stub abutments founded on drilled shafts and a single pier also supported on drilled shafts. The project required construction of a new center pier within the Taunton River, and the Water Quality Certificate was submitted to DEP. The proposed roadside approach work impacted Bordering Vegetated Wetlands (BVW). The impact was mitigated by replicating the wetland area in the vicinity of the project site. The construction of the bridge was completed in 2009.

RIDOT Bridges 1003 & 1004

Green provided design services for two bridges for the Post Road Ramp interchange in Rhode Island. These bridges are part of a RIDOT mega-project to improve access to Quonset Point, Davisville, from Route 4 in Rhode Island.  Green's project participation consisted of design of two new bridges.

The Post Road Ramp D bridge (Bridge No. 1004) consisted of five (5) prestressed New England bulb tees spanning 133' and acts compositely with a reinforced concrete deck.  The Post Road Davisville Access bridge (Bridge No. 1003) consisted of ten (10) prestressed New England bulb tees spanning 108'.  The both bridge are supported on reinforced concrete cantilevered abutments. The design of these bridges provided numerous challenges that had to be resolved. The bridges are both on large skews and therefore required special attention to the detailing of the beams at the abutments.  The abutments and a portion of the retaining walls are very tall and development of design to provide the most economical solutions was another challenge. Temporary earth support system to maintain traffic flow on the existing roadways during bridge construction was also designed. Construction for the project was recently completed to the entire satisfaction of RIDOT.

MassDOT (MBTA) Merrimack Bridge

Green is providing design services for the Washington Street Bridge, Haverhill, Massachusetts. The Washington Street Bridge consists of a three span structure with an overall length of 107’ and an overall width of 36.5’. The bridge carries two tracks of the MBTA West Route Commuter Line and a siding track. The bridge superstructure consists of five built-up steel through plate girders with steel rolled floorbeams spaced at 2’ and a steel plate deck. The bridge is supported on granite abutments and steel bent piers. Green performed in-depth and fracture critical inspection of the bridge, as-built and as-inspected load ratings, as well as fatigue and seismic evaluation. As part of Phase 1 submission, Green prepared a bridge evaluation report incorporating the inspection findings, load ratings, fatigue and seismic evaluation, and rehabilitation/repair recommendations. In the subsequent phase of the project, Green will perform final design and prepare construction documents including plans, specifications and estimates for the MBTA’s approved rehabilitation/repairs.