Pawtucket Canal, Lower Locks, Lowell, Middlesex County, MA

Significance: The Lower Locks are comprised of two navigation locks and a dam, with a head of 17 feet. They were some of the earliest locks in the Lowell Canal System, originally constructed in the first phase of canal construction in the 1820s, and rebuilt after the opening of the Eastern Canal in 1836.
Unprocessed Field note material exists for this structure: FN-5
Survey number: HAER MA-2-C
Building/structure dates: 1797 Initial Construction
Building/structure dates: 1822-1823 Subsequent Work
Building/structure dates: 1836 Subsequent Work
Building/structure dates: 1841-1843 Subsequent Work
Building/structure dates: 1887 Subsequent Work
Building/structure dates: 1905 Subsequent Work
Building/structure dates: 1910 Subsequent Work
Building/structure dates: 1946-1958 Subsequent Work