Project Summary

The Bath Village Covered Bridge is a 375′ long multi-span structure that spans the Ammonoosuc River. It was constructed in 1832 at a cost of $1,900 as a 3-span structure, utilizing a unique truss type. A third pier was added in the 1890s and the bridge raised 2′ vertically in 1918. The need for the project arose from deterioration of bridge members and loss of camber in the bridge trusses. 

A detailed inspection structural analysis of the bridge was completed to evaluate the Town’s goal of increasing the bridge live load capacity from 6 to 10 tons. It was determined with replacement of the existing floor system, which was a recent addition to the bridge, and minor modifications to the trusses that the bridge could support a 10 ton live load. During the design phase of the project, deterioration of the west pier cribbing and ice damage to the bridge required interim repairs which were designed by Hoyle Tanner. The rehabilitation included repair or replacement of deteriorated bridge members, truss cambering, a new roof, installation of fire detection and protection systems within the bridge and minor substructure modifications. 

Near full-time construction observation and administration services were provided following the NHDOT Local Public Agency program guidelines. The project is partially funded through the National Historic Covered Bridge Preservation Program. 

AWARDS: 2015 Engineering Excellence Award, Honorable Mention, ACEC-NH; 2015 APWA Project of the Year for Small Cities / Rural Communities: Historical Restoration