The Thomson Reservoir isn’t very deep, which makes changes during a drought particularly striking, according to Kris Hiller, a naturalist at Jay Cooke State Park.
“Typically we tell people when it’s full, it’s roughly 15 feet deep at its deepest,” she said. “So it’s not a terribly deep body of water, either, and when you don’t have rain like this for a while, it quickly becomes noticeable that everything’s getting exposed.”
Swiftwater Adventures, a whitewater rafting company that operates on the St. Louis River, will likely shut down its season soon because of low water levels.
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