Hamilton Street Dam, Lehigh River upstream of Hamilton Street Bridge, Allentown, Lehigh County, PA
Significance: The Hamilton Street Dam is an integral part of the Lehigh Canal, which was of major economic importance in the development of industry in the Lehigh Valley in the nineteenth century. The V-shaped, wooden and rock crib dam provided all the water needed to operate the canal's Section 7 which passes through Allentown and Bethlehem.
Survey number: HAER PA-89
Building/structure dates: 1829 Initial Construction
Building/structure dates: 1829-1942 Subsequent Work