May 12, 2008 - MPR’s Bob Kelleher reports that Lake Superior's low water in 2007’ revealed something disturbing…gaping rusted holes in much of the underwater steel in the Duluth-Superior harbor. The aggressive corrosion, discovered just a couple of years ago, has caused extensive damage below the water line. The cause is still a mystery, but studies have begun to identify some leading suspects.
December 26, 2006 - MPR’s Bob Kelleher reports that the level of Lake Superior recently hit an all time low - at least in recorded history. That's making trouble for boaters, and especially for the big ore freighters. An extended drought and a warming lake are reasons behind the drop in water level.