Oswego Canal Lock 1 is located beside Culvert Street, off Main Street (County Road 57). It was built around 1911, and has a lift of 10.2 ft (3.11 m) to the south. Just north of the canal lock is a heel trunnion single-leaf bascule bridge carrying Culvert Street which raises up when the downstream gates of the lock are opened in order to provide adequate clearance for passing marine vessels. Built in 1986, it has a span of 67 ft (20 m). Another heel trunnion single-leaf bascule bridge is located along the canal lock, constructed in 1912, which was used to access the lockhouse and factories on Mill Island (now called Lock Island) from nearby Bridge Street. It was taken out of service when a driveway was routed to the site from Culvert Street. The bridge is currently locked in the raised position.