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Aspetuck Ridge Road over Merryall Brook Bridge Replacement, New Milford, CT
HRP provided design services for the replacement of the Aspetuck Ridge Road Bridge over Merryall Brook, in the Town of New Milford. The project is part of the Connecticut Local Bridge Program and is identified as ConnDOT Bridge No. 05111. The program provides for both federal and state financial assistance to municipalities for the removal, replacement, reconstruction, and rehabilitation of local bridges.
This bridge was replaced due to the poor condition of the current structure which was approximately 60 years old. The existing structure consisted of steel rolled beams, supporting a reinforced concrete deck, founded on stone masonry abutments. Previous inspections of the bridge determined it to be structural deficient; therefore, the load rating of the structure had been reduced. The proposed replacement structure consisted of precast, prestressed concrete deck units, supported by cast-in-place reinforced concrete abutments and wingwalls supported by cast-in-place reinforced concrete drilled shafts. Hydrologic and hydraulic analysis was performed in order to properly size the replacement structure to convey the 100-year storm event.
A scour analysis determined that a pile/shaft supported foundation would be needed to protect against scour. A cast-in-place reinforced concrete drilled shafts were used due to the density of the underlying soils as well as cost. Because the project had state and federal funding, Flood Management Certification (FMC) was required for the project. We prepared the application and secured FMC through the new “Memorandum of Understanding” (MOU) permit process. The bridge was reconstructed in 2014, and HRP performed construction oversight during construction.