In 2017 the MN DNR authorized permits for treatment of Curly Leaf Pondweed on Kroon Lake (5.3 acres), Chisago Lake (17 acres) and South Lindstrom (4.8 acres). Eurasian Water Milfoil was permited for 17 acres on Chisago Lake (150 feet from shore in a L shape following the contour of the south shoreline).