Willow Street Bridge over Beaver Brook was a 39-foot span steel beam bridge originally constructed within a floodplain in 1955. Although not on the New Hampshire Department of Transportation’s (NHDOT) Municipal Redlist, it had been rated as functionally obsolete. The existing bridge was very narrow and was subjected to flooding at flows less than the 50-year storm.
The new replacement structure is a 104-foot span steel beam superstructure with integral abutments consisting of cast-in-place concrete pile caps supported on steel H-piles. The new bridge was constructed with 12-foot travel lanes with 2-foot shoulders and a 6-foot sidewalk for an out to out width of 37.5 feet. The project also featured construction of approximately 400 linear feet of connected sidewalk along the north side of Willow Street. The newly constructed sidewalk will tie into the sidewalk system programmed into the Town’s Master Plan.
The bridge replacement structure was funded by the Town of Pelham and the NHDOT Municipally-Managed Bridge Aid Program and was completed in the fall of 2019.