Detail of construction of Alfred Helmrich's dam, in upper Rockaway Valley. Morris County, New Jersey. 1926.
Dates
Date Taken
1926-09-24
Summary
Detail of construction of Alfred Helmrich's dam, in upper Rockaway Valley, in the northwestern part of Morristown quadrangle. Morris County, New Jersey. September 24, 1926.
Summary
Detail of construction of Alfred Helmrich's dam, in upper Rockaway Valley, in the northwestern part of Morristown quadrangle. Morris County, New Jersey. September 24, 1926.
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