Typical low-level dams in the Schuylkill River basin. Chester County, Pennsylvania. circa. 1984.
Dates
Date Taken
1984
Summary
Typical low-level dams in the Schuylkill River basin. A, Black Rock Dam near Phoenixville. Chester County, Pennsylvania. circa. 1984. Published as figure 4-A in U. S. Geological Survey. Water-supply paper 2256-B. 1985.
Summary
Typical low-level dams in the Schuylkill River basin. A, Black Rock Dam near Phoenixville. Chester County, Pennsylvania. circa. 1984.
Published as figure 4-A in U. S. Geological Survey. Water-supply paper 2256-B. 1985.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Yorke, Thomas H Collection
Rights
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