MILWAUKEE (AP) – Low water levels in the Great Lakes are causing problems for shippers, who are having to shed cargo to avoid running aground in shallower waters.  A Milwaukee Journal Sentinel report (http://bit.ly/16jrMuM ) says the official depth of the navigable waters is supposed to be 27.5 feet. But in some areas this spring it was closer to 25 feet.  Jim Weakley is the president of the Lake Carriers Association. He says people sometimes refer to changes in the water levels as cyclical, but he doesn’t use that term because it implies the water will return to its former level. He says levels have been below the long-term average for 14 years.  That’s a problem for the shipping industry. Freighters have begun sailing under capacity to avoid running aground.

—      Information from: Milwaukee Journal Sentinel, http://www.jsonline.com