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:
Lock Chesapeake and Ohio Canal drawing from HABS. en Drawing of Lock an design lock Note how gates are BELOW the breast wall and there are no conduits in the masonry as opposed to the design locks HABS says HABS MD HARF sheet of Chesapeake Ohio Canal Lock miles above tidewater Sharpsburg Washington County MD loc gov sheet