US Army Corps of Engineers
Rock Island District Website

Careful Observation
Safety Officer, Troy Larson (left), Crane Supervisor, Jeff Griffin (right) and Crane Operator, Cary Hahn (lower right) watch closely as one of the jacks used to raise the T.J. O'Brien sector gates, pushes the 255,000-pound gate into the air.

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Photo by: Samantha Heilig |  VIRIN: 141211-A-VX113-002.JPG