Stream Restoration Workshop
Dave Derrick, Research Hydraulic Engineer (left) explains how the Army Corps of Engineers restored the functionality of a section of the Tacony Creek in Philadelphia during a workshop July 23. The workshop was hosted by the U.S. Army Corps of Engineers, the Environmental Protection Agency and the Philadelphia Water Department and included participants from federal, state and local agencies.

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Photo by: Steve Rochette |  VIRIN: 130729-A-EO314-103.JPG