FIGURE 6-5. WINDROWS OF BRUSH ON JANET BEFORE FINAL DISPOSITION. This view is almost due east. The LLL farm is shown in the foreground, Building 3.1.1. (later removed) is in the upper right background. Morning glory vines have begun to invade the cleared area between windrows. (Spring 1978) Initially, the method employed to clear an access lane was to set the bulldozer blade at a depth to eut about three inches of soil. This depth was sufficient to uproot most of the brush. The problem was that a mound of soil would quickly build up in front of the blade, creating an operational problem for the driver. At first, the operators tried to push all of the accumulated soil and brush down to the end of the lane which was usually at the beach. This was not practical on long lanes, so the second improvement was to build up only a smail pile in front of the blade, then push this material to the side of the lane. The turning action required to deposit the detritus at laneside, then reorient to the lane direction, was found to churn too much soil on islands with a very loose, sandy soil texture, but was acceptable on islands with a more dense soil. 168