This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FMIB East Center and West Walls of Upper Lock Under Construction.jpeg East Center and West Walls of Upper Lock Under Construction Conveying Concrete by Chutes Miraflores Locks Panama Canal Subject Panama Canal Panama Locks Hydraulic engineering Geographic Subject Panama Tag Panama Canal Cite book East Center and West Walls of Upper