Allegheny Aqueduct, also known as Gibraltar Aqueduct, is a historic stone aqueduct located at Robeson Township in Berks County, Pennsylvania. It was built in 1824 and is about 260-foot-long (79 m) and 70-foot-wide (21 m). It was built as part of the Schuylkill Navigation Company canal system to carry canal boats across the Allegheny Creek. It is supported by a stone arch bridge structure with five spans. The aqueduct was in operation until 1928 and drained in 1967.[2]