Flash flooding in the Saxon Harbor area of Iron County on Monday night caused major damage and left one person dead.

Iron County Sheriff Tony Furyk said Mitchell R. Koski, 56, of Montreal was pronounced dead by the county coroner.

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“Basically, the campground and southern half of the marina is gone, washed away,” said Eric Peterson, administrator of Iron County Forest and Parks Department, which owns the property. “The northern half of the marina, over 50 percent of that is destroyed” and the rest damaged.

He estimated damage would be in the millions if not in the tens of millions