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Vermilion River Rapids, February 12, 2009

Vermilion River Rapids, February 12, 2009

Matthiessen State Park, Illinois

During lower water levels, the submerged boulders causing these rapids would emerge far above the water's surface. Other, smaller boulders would also be partially above water causing additional turbulence and more white caps. Over the years, the swift-moving water has cut into the bluffs (visible on the right side of the photograph) as the Vermillion River abruptly changes direction, resulting in a near vertical drop on the bluff side.