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@@TheDutchShepherd I don’t think you are really Dutch. A Dutchman will know the difference between coamings and a gangway. I do live by a river and I was a commercial pilot for 37 years on that river after being at sea for 21 years as a master mariner. I tell you these small facts in case you think I am ill informed.
Hello, thank you for watching the video. When the tide recedes or the tide rises, water will flow through the dam gate. When you close the dam gate, water will not flow through.