View showing a man on the edge of the cofferdam, looking south with the Allegheny River in the background. A cofferdam is a temporary structure created to expose areas that are normally underwater so that work, such as creating supports or repairs can be completed.
Pittsburgh City Photographer Collection, 1901-2002, AIS.1971.05, Archives Service Center, University of Pittsburgh
Waterworks--Pennsylvania--Pittsburgh--Design and construction.; Blue collar workers--Pennsylvania--Pittsburgh.; Cofferdams--Pennsylvania--Pittsburgh--Design and construction.; Allegheny River (Pa. and N.Y.).; Rivers--Pennsylvania--Pittsburgh.; Lincoln-Lemington-Belmar (Pittsburgh, Pa.).
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