Lake levels in the Great Lakes

July 6, 2010

1500 Years of Changing Lake Levels

Geologists have found that lake levels in Lake Michigan and Huron have fluctuated between highs of around 585 feet and lows of 572 feet for the past 1,500 years. Fifty feet of beach can disappear in just a few hours during a storm when waves undercut a sand bank and wash it away, especially when lake levels are high.

Record lows were set in 1964. People bought beachfront property and built during the time of low water, not understanding that changes in lake levels are normal. The amount of water in the Great Lakes rises and falls periodically.

This is an excerpt from The Dynamic Great Lakes.


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