Monongahela Navigation Company Lock & Dam No. 7, River Mile No. 82.5, Greensboro, Greene County, PA
Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-299, Monongahela Lock and Dam No. 7; and HAER PA-304, Lower Monongahela River Public Improvements. Individual site reports related to the Lower Monongahela River Public Improvements can be found at HAER PA-390 through HAER PA-400.
Survey number: HAER PA-385
Building/structure dates: 1883 Initial Construction
Building/structure dates: ca. 1897 Subsequent Work
Building/structure dates: 1926 Demolished