Built between 1836 and 1838, the Licking Creek aqueduct is the first of six single-arch aqueducts on the line of the canal and the longest of the Canal’s aqueducts. The Canal company described the 90-foot aqueduct as “one of the longest, if not the longest aqueduct in the United States,” although later the 297-foot Cabin John aqueduct was constructed at mile 7.6. The aqueduct’s first use was in April 1839.