This bridge is an attractive, traditionally composed example of an early 20th Century through truss. It was designed by the firm of Storrs and Storrs, which was based out of Concord, New Hampshire and apparently was a well-known firm for bridge work in New England. The senior member of this firm, John Williams Storrs, was also noteworthy as the first state highway engineer for New Hampshire. Groton Bridge Company, also a well-known bridge builder that was prolific in the northeastern United States, constructed the bridge.
This bridge was rehabilitated in 2001 and it remains in excellent condition today. There was some alteration during rehabilitation, most noteworthy the replacement of the bottom chord and the replacement of the floor beams. The bottom chord was replaced in kind, however bolts were used instead of rivets, as apparently was the case elsewhere on the bridge where rivets were removed.
This bridge is noted for being in close proximity to another historic truss bridge built around 15 years later, the Western Avenue Bridge. The Western Avenue Bridge appears to have been built to carry US-202, as an improved alignment for traffic heading southbound/northbound in this area. It eliminates a 90 degree turn that would be needed if using Patterson Hill Road Bridge. As such, this likely reduced the traffic on Patterson Hill Road Bridge, making it more of a local traffic bridge.
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