Maintaining inventory of Corps dams takes year-round effort
Geotechnical Engineer Ken Pattermann takes notes regarding the Black Butte Dam spillway while participating in an annual inspection with the U.S. Army Corps of Engineers Sacramento District on Nov. 30, 2017. (U.S. Army photo by J. Paul Bruton / released)

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Photo by: U.S. Army Corps of Engineers |  VIRIN: 171205-A-ZZ999-005.JPG