The Reynolds Mill Road bridge over the east branch of the Codorus Creek reopened to traffic Thursday after a roughly four-month rehabilitation project.
Mike Crochunis, state Department of Transportation spokesman, said the bridge reopened to traffic Thursday afternoon.
It was closed in April so Kinsley Construction could replace the bridge, install beams and guide rails and construct the road approaches.
The project was expected to cost $705,529.
The old bridge was built in 1947 and was classified as structurally deficient.