Union Street Bridge over Nubanusit Brook

Peterborough, New Hampshire

Client: Town of Peterborough, NH


  • Design
  • Permitting
  • Historic Resources
  • Construction Observation
  • Materials Testing

Project Summary

Hoyle, Tanner provided study and design services to rehabilitate the existing 65′ span historic concrete rigid frame structure. Included in the evaluation was a load rating of the existing structure and concrete coring and testing. Concrete cores from the legs revealed high-strength concrete suitable for reuse. The rehabilitated structure will include replacement of the top slab of the rigid frame, supplemental reinforcing steel in the negative moment regions of the structure and mapping and replacing of the decorative stone fascias. Roadway improvements include maintenance of traffic by use of a temporary traffic signal to maintain one lane of alternating two-way traffic during construction. The project also includes coordination with cultural resources adjacent to the project, as well as with the owner of an upstream dam which is connected to the upstream bridge wingwalls.

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