Duluth (NNCNOW.com) --- The Minnesota Department of Natural Resources has issued burning restrictions for parts of Northeastern Minnesota. The DNR placed burning restrictions on the the following counties and dates: April 21: Pine County May 6: Aitkin, Crow Wing, Mille Lacs, Kanabec, and southern Cass Counties May 13: Itasca, Southern Cass, Carlton, and southern St. Louis counties Later in May: Koochiching, Northern St. Louis, Lake and Cook Counties Most wildfires occur between April and May and 95 percent of them are caused by human error. Because of the high fire risk, the DNR places the burning restrictions to coincide with the annual fire season. The restrictions depend on the weather but normally last anywhere from four to six weeks until there is enough green vegetative growth. Residents are reminded that an open burning permit is required for any fire larger than three feet in diameter and if there is less than three inches of snow on the ground. Illegal burning is a misdemeanor but large fines often result from escaped fires. People can be held personally and financially liable for the costs associated with loss of property, firefighting expenses and cleanup and proper disposal or burnt materials. Posted to the web by Raeanna Marnati rmarnati@kbjr.com