Monongahela River Lock & Dam No. 7, River Mile No. 85, Greensboro, Greene County, PA

Part of the Monongahela River Recording Project, which included HAER PA-300, Port Perry Bridge; HAER PA-385, Monongahela Navation Company 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.
Significance: Lock & Dam No. 7 are among the oldest structures of the Monongahela River navigation system. The engineering design and materials used are typical of lock and dam engineering in the United States during the 1920s.
Unprocessed Field note material exists for this structure: N763
Survey number: HAER PA-299
Building/structure dates: 1923-1926 Initial Construction