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At the far end of this irrigation canal or ditch, there is a headgate and the pin and plank in conjunction with each other, regulates how much water goes down past it in the main canal and how much goes down the irrigation ditch.

Photo taken June 11, 2019 at the Big Hole River in Montana located in Beaverhead County.

. Original public domain image from Flickr

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Public DomainFree CCO U.S. Government image for Personal and Business use

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At the far end of this irrigation canal or ditch, there is a headgate and the pin and plank in conjunction with each other, regulates how much water goes down past it in the main canal and how much goes down the irrigation ditch.

More