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

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 ...

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.