NOTICE: It is unlawful to plow or deposit snow across any public roadway/highway, including the Town of St. Joseph roads. When plowing or blowing snow, please deposit it in the ditch on your own side of the road. Violations of this can result in a fine by the Town of St. Joseph. 

Wisconsin State Legislature - Rules of the Road
WI .§346.94(5)  Placing injurious substance on highway.  No person shall place or cause to be placed upon a highway any foreign substance which is or may be injurious to any vehicle or part thereof.