This bridge was built over the Connecticut River to join two communities. In 1876, the town of Pittsburgh, NH voted to build the bridge. Given that there are no records on the construction of the bridge, it is assumed it was built that year. In 1878, the Town of Pittsburgh asked officials in Clarksville for some compensation for the construction of the bridge because it serves both towns. The town of Clarksville voted to not pay anything. The moral of the story is to negotiate your terms before you build your bridge.
On a happier note, the bridge was rehabilitated in 1974. The $6,700 price tag was shared by Pittsburg and Clarksville with additional funds from the state.
The bridge was built at the site of Fletchers Mill. (I took the first image standing on the ruined foundations of the mill.) Fletchers Mill was built in 1815 when this area was known as the Indian Stream Territory. The water powered mill had two floors, one milled grain and the other was a saw mill. A mill was essential to the development of the region.