Study: Upper Great Lakes not losing extra water

DETROIT -- An engineering study says Lake Michigan and Lake Huron aren't losing billions of gallons of extra water daily through an artificially made opening in the St. Clair River, as a Canadian group contends.

The study for the U.S. and Canadian governments, released Friday, says daily outflow from Lake Huron rose by about 4.6 billion gallons in the late 1980s. But it says the problem fixed itself as equilibrium was restored between Huron and Lake Erie to the south.

The report denies the Georgian Bay Association's claim that erosion and other human-caused factors are producing excessive water loss and low levels in northeastern Lake Huron.

The association wants barriers placed in the St. Clair River to slow the flow from Lake Huron. The study says that's not necessary.