Sponsored By
An organization or individual has paid for the creation of this work but did not approve or review it.

ADVERTISEMENT

ADVERTISEMENT

Corps to start annual ice measurements on Lake Pepin on Wednesday

If you see some folks drilling into the ice on Lake Pepin next Wednesday, don't be alarmed. The U.S. Army Corps of Engineers, St. Paul District, plans to conduct it's annual ice survey of the lake next week.

febb3adc14b9d40455965f272f966d7e.jpg
Bill Chelmowski, of the U.S. Army Corps of Engineers, St. Paul District, uses an ice auger to drill a hole on Lake Pepin near Wabasha in this contributed photo from Feb. 13, 2019. The Corps annually surveys the ice to help the navigation industry determine when it is safe for tows to break through the ice.

LAKE PEPIN — If you see some folks drilling into the ice on Lake Pepin next Wednesday, don't be alarmed. The U.S. Army Corps of Engineers, St. Paul District, plans to conduct it's annual ice survey of the lake next week.

As part of its efforts to forecast the navigation outlook for the Upper Mississippi River, the Corps takes ice measurements on Lake Pepin, measuring the ice's thickness. The lake provides a good source for sampling the ice as it is the widest, naturally occurring part of the Mississippi River. Each year, the lake’s ice is the last major barrier for vessels reaching the head of the navigation channel in St. Paul.

Using an airboat, a global positioning system and ice augers to drill through the thick crust on the lake, a Corps survey crew collects the data that will help estimate when it’s safe to break through the ice and begin the 2020 navigation season.

Last year's navigation season was anything but normal, with flooding and high water on the Mississippi River hindering the navigation season. For example, Lock and Dam No. 4 — the last stop on the river before vessels would reach Red Wing — saw 1,371 commercial navigation lockages. That total was below the 10-year average of 1,442, according to the Corps.

The 2019 lockages supported 6,847,616 tons of commodities by the navigation industry. By comparison, the 2018 season saw 1,646 commercial lockages that moved 9,050,677 tons of commodities, the Corps reported.

ADVERTISEMENT

The first tow through Lake Pepin last year was the MV Aaron F. Barrett, which reached St. Paul on April 24. Historically, the average date for the first tow occurs during the third week of March.

Patrick Moes, a spokesman for the Corps, said ice conditions this winter have been anything but normal.

"The temperature roller coaster we had, obviously that created a lot of melt," Moes said. "Flows get into the river and break up that hard crust. That's why we have some of those ice jams we've had."

Whether that will impact the start of navigation season or not, he said, depends on how quickly the spring melt occurs and whether there will be significant flooding along the river in the spring. 

Once the Corps starts measuring ice on the river, it typically takes weekly measurements until the first tow arrives. Ice measurements are posted on the St. Paul District website at www.mvp.usace.army.mil/Missions/Navigation/Ice-Measurements .

Related Topics: ST. PAULMISSISSIPPI RIVER
What To Read Next
Degenerative disk disease is effected by many factors including age. But there are other factors within your control that you can adjust for better spine health.
Artificial intelligence can now act as an artist or a writer. Does that mean AI is ready to play doctor? Many institutions, including Mayo Clinic, believe that AI is ready to become a useful tool.
Dozens of private well owners from five counties filed through the St. Charles Community Center on Thursday to learn more about a resource they use daily: water from their private wells.
The converted bus is a rolling blood donation center with equipment and staff ready to travel to sites in southeast Minnesota.