MANITOWOC COUNTY HIGHWAY DEPARTMENT 3500 State Highway 310 Manitowoc, WI 54220 9659 920-683-4345 2026 Invasive Species Spraying Invasive species within the road right-of-way and adjacent properties can pose significant health risks to emergency responders, highway workers, utility workers, and anyone else utilizing the right-of-way. In the month of May, you may notice our crews spraying these areas to help control and eradicate Wild Parsnip and other harmful invasive weed species. Also, this is a plant growth regulator that slows the grass growth to improve vision. Our staff has been trained and certified in applying EPA (Environmental Protection Agency) certified herbicides. These herbicides are plant specific and will not hurt birds, bees, butterflies and other animals/insects that live in the ROW. This means grasses, milkweed and other native plants will flourish helping out our wildlife and pollinators. Our intention is to spray all County roads 15'-25' from the shoulder. Manitowoc County will also be spraying the following areas for Wisconsin DOT. Waldo Boulevard from CTH R to I-43 median and outsides. STH 310 roundabout at CTH R STH 32/57 approximately 300' each direction from crossovers including the medians. Memorial Drive medians. For more information, please see our website: Manitowoc County - Notices - Manitowoc County WNAXLP April 2 2026 LWIX0490058