My brother and I went up to the Keewenaw this past weekend and notice an odd pattern on the side of the roads where the snow is plowed. It looks like someone took a skid steet ever 200 feet or so and made a slight indentation in the snow. Any ideas of why they do that? I saw some other areas where someone took a skid steer and cleared out a continuous area in a similiar fashion. Just not sure what they are doing.