Lehigh Canal, Monocacy Creek Aqueduct, Lehigh Canal across Monocacy Creek, Bethlehem, Northampton County, PA

Significance: One of four aqueducts constructed by the Lehigh Coal and Navigation Company in 1829. Although the other three made use of wooden troughs on stone abutments and piers, the Monocacy Creek Aqueduct, the largest of the four, was built entirely of stone using three arches to cross the creek. The stone abutments for this aqueduct still survive though the trough has been replaced by a narrow steel trough carrying water across the towpaths of either side. Downstream of the aqueduct the city has constructed a broad spillway to pass large amounts of water from the canal into the creek in times of flooding.
Survey number: HAER PA-144
Building/structure dates: 1829 Initial Construction