Wet March Keeps Lake Superior Level High

Recent shoreline erosion is seen in Duluth Township. Recent shoreline erosion is seen in Duluth Township. |  Photo: Jon Ellis/WDIO-TV

Created: April 03, 2019 04:29 PM

Lake Superior's water level remains well above average after a wet March.

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The International Lake Superior Board of Control says the lake fell two centimeters (0.8 inches) in March, which is the average water level decline for the month.  The lake is 33 centimeters (13 inches) above its 100-year average and also a few inches higher than it was at this time last year.

Lake Superior is expected to begin its seasonal rise in April. The board said the above-average water levels, combined with strong wind and waves, could continue to cause shoreline erosion and coastal damage and advised people to prepare for possible damage.

In an effort to deal with high water levels over the winter, the board allowed hydropower plants to flow at their maximum capacity and released more water than usual through a control structure at the head of the St. Marys Rapids. Still, the board stressed that its actions cannot fully manage water levels, which are primarily controlled by hydrologic conditions.

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