US Army Corps of Engineers
Jacksonville District Website

The crane operator begins the installation by setting a steel I-beam into the girder recess notch in the lock wall, starting with the upper or upstream end of the lock.
The crane operator begins the installation by setting a steel I-beam into the girder recess notch in the lock wall, starting with the upper or upstream end of the lock.

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Photo by: Erica Skolte |  VIRIN: 180605-A-ZO284-053.JPG