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Low-head dams: A not-so clear and present danger! The low-head dam, a man-made, wall-like structure, is typically built to back up water in a reservoir. As the water flows over the crest and drops to the lower level, it creates a hydraulic jack, which is a backwash that traps and recirculates anything that floats.

A person caught in the backwash of a low-head dam will be carried to the face of the dam, where the water pouring over it will wash him down under to a point downstream called the boil. The boil is that position where the water from below surfaces, and moves either downstream or back toward the dam. A person who is caught in a low head dam struggles to the surface, where the backwash once again carries him to the face of the dam, thus continuing the cycle (a.k.a. "a death swirl"). To complicate matters, these dams are usually loaded with debris,posing additional problems should a person get trapped in this dangerous structure.

#ohiogram #odnr #tuscarawasriver #lowhead_dam #dam_girl #damlove #dam #cloudy #cloudysky #cloudlovers #skywatchers #skylove #riverdebris #river #rivers #ohio #ohioproud #tree #trees #greengrass #roadsofohio #latergram #ipulledoverforthis

7/1/14 Sunset on the Hoover Reservoir, which is 94 ft. above the stream bed and holds an excess of 19.6 billion gallons of water. (This photo is completely unedited/unfiltered, and was taken with my cell phone.) #asseenincolumbus #expcols #socolumbus #hooverdam #ohio #odnr #ohiogram #dam_girl #damlove #damsunset #dam #sunsetlovers #sunset #sunsetjunkie #614artists #sky_painters #skywatchers #skysonfire #sunset_universe #wicked_reflection #igerscolumbus #columbusohio #columbusgram

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