Dam forms roiling cauldron of peril

The circular motion of water flowing over a dam and swirling in front of it was a risk a group of teens didn’t understand when they tried to help a friend.

As water comes down the dam, it pushes down toward the ground and creates circulating motions about 6 to 10 feet from the dam, Indiana Department of Natural Resources Officer Bill Browne said.

The circulating section in front of a low-head dam, such as the Big Blue River dam in Edinburgh, will pull a log, person or boat toward the dam wall and then the water falling from upstream pushes it down under the surface.

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