This is part 2 of 2 videos I made where I discuss locating check dams in a ditch.
February 11, 2020
February 10, 2020
Dams in a Ditch
This is part 1 of 2 videos I made explaining how to locate check dams in a ditch.
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November 5, 2019
Inspect Sand Bag Check Dams
How to inspect sand bag check dams.
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January 25, 2017
Straw Bale Check Dams
Straw bale check dams installed in ditch lines with water flows is a mistake. Water goes under and around, causing erosion, rather than backing up behind to allow sediment to settle. Check dams need to have a center point that is 6 to 12 inches lower than the outer edges so that water flows over the top, rather than around the sides. You can’t do this with straw bales. For this reason, these are not allowed to be used as check dams in the state of Washington.
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May 17, 2016
Inspecting-Check Dams Need Low Center Point
Check dams need to be installed with a low center point. This means that the center of the dam is at least 6 to 8 inches lower than the outside edge; 12 inches in areas where intense rainfall occurs. If the center is higher than the outer edges, water will run around the dam and erode the side slopes of the ditch, causing erosion. If the ditch is shallow and you are using triangular silt dikes, you might need to add sand bags to create a point that is lower than the center.
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