Lake Pepin Ice Measurements


It’s a sign that spring is near, as the U.S. Army Corps of Engineers, St. Paul District, will start its annual Lake Pepin ice measurements Wednesday, February 16.


The Corps takes ice measurements on Lake Pepin annually to forecast the navigational outlook. Lake Pepin ice thickness is measured, because it’s the widest, naturally occurring part of the Mississippi River. The lake’s ice is the last major barrier for vessels reaching the head of the navigation channel in St. Paul, Minnesota.


The information will be used by the navigation industry to predict when it’s safe to break through the ice and begin the 2022 navigation season.


The Motor Vessel R. Clayton McWhorter was the first tow to pass through Lake Pepin last year and reach St. Paul, Minnesota, arriving March 19, 2021.


Historically the average date in which navigation is open occurs during the third week of March.

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