The U.S. Army Corps of Engineers, St. Paul District survey team took the fourth ice thickness measurements of the season on Lake Pepin Wednesday.
The thickest ice is 25-27 inches between river miles 767 and 770, between the foot of Lake Pepin and Lake City. The thinnest, 8-15 inches, was measured between river miles 774 and 780.
Historically the average date in which navigation is open on the Mississippi Riverr occurs during the third week of March.
The next ice measurement will be Wednesday, March 16th.