Rubble ridges, which have been built parallel to the shore, help retain some sand without fully stopping the natural flow in the lake.

Between ice breaking tug boats, massive cranes and large barges, ... the Sheboygan River that also flows into Lake Michigan; and the St. Louis River that flows into Lake Superior.

Lake Michigan's ice cover high was 93.2% in 2014. Lake Huron had 98.2% ice cover in 1996. Lake Erie froze over completely in 1978, 1979 and 1996. Lake Ontario had 86.2% ice coverage in 1979.

Juvenile whitefish numbers are plummeting in Lake Michigan and Lake Huron. Updated: Jul. 24, ... high flow rates, ... Diminishing ice cover on Lake Superior.

What is the record ice coverage for the Great Lakes? The overall highest percentage of ice coverage for all the Great Lakes took place in 1979 when they were 94.7% covered, NOAA said.. Lake Superior ...