Posted at 4:45 p.m. on December 28, 2020
The Brillion News
THE LEDGE - A helicopter will be flying over the geologic formation known as "The Ledge" in northeast Wisconsin for the next few weeks, conducting an aerial survey for the U.S. Geological Survey (USGS).
Starting on or around January 4 and lasting two to three weeks, a helicopter towing a large hoop from a cable will begin making low-level flights over northeast Wisconsin between Calumet and Door counties.
Scientists will use data collected during the survey to map shallow bedrock and glacial sediments in parts of Door, Kewaunee, Brown, Manitowoc, Calumet, Sheboygan and Fond du Lac counties. The maps will help the Wisconsin Department of Agriculture, Trade and Consumer Protection and the Wisconsin Department of Natural Resources develop new water-quality and land-use standards.