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southern portion of the work area. The disposal area boundaries will be marked in the field by the <br />PROJECT MANAGER. The rubble will initially be placed against the backwall, and shall extend <br />to no further than the perimeter of the disposal area. The rubble shall be placed as tightly as <br />possible within the disposal area, and will be spread as evenly as possible from south to north. <br />Rubble shall be deposited in the disposal area in such a manner so that void spaces are minimized, <br />and so that the top of the ruble is level. No piece of rubble or debris may exceed a height of <br />eighteen inches (18 ") above the mean elevation of the surrounding material. The outslopes <br />established by disposal of the rubble may not exceed 3.5H:1V upon completion of the Project. <br />The height of rubble when placed in the area shall not exceed eight feet (8') as measured from <br />ground level immediately adjacent to the disposal area. <br />Central Work Area <br />All concrete, block wall, and asphaltic materials as well as miscellaneous debris and materials <br />located within the designated demolition area will be demolished and transported to the adjacent <br />disposal area. <br />Demolition will occur within a one - hundred twenty -feet (120') wide corridor near the northern <br />boundary of the work area. The demolition corridor begins at the low concrete wall adjacent to <br />the perimeter ditch located just above and south of Coal Creek. The demolition corridor extends <br />south for one - hundred twenty -feet (120'). The southern boundary of the demolition corridor shall <br />be marked in the field by the PROJECT MANAGER. All concrete, block wall, and asphaltic <br />materials as well as miscellaneous debris and materials located within the demolition corridor shall <br />be demolished to a minimum depth of three feet (3') below ground level as measured from ground <br />surface immediately adjacent to each structure. <br />Rubble generated through the demolition process shall be disposed of at the Central Work area <br />disposal site, which is located immediately south of the demolition corridor. The perimeter of the <br />disposal area shall be marked in the field by the PROJECT MANAGER. <br />The rubble generated as a result of the demolition process, including all other rubble, trash and <br />debris, shall be placed against the back wall of the disposal area, and shall be evenly spread at the <br />base of the feature for the length of the disposal area. The height of the rubble, upon completion <br />of the disposal process, shall not exceed twenty feet (20') as measured from ground surface at the <br />southern most extent of the disposal area. The disposal area shall be constructed so that upon <br />completion, the side slopes of the rubble do not exceed 5H:1 V on the north slope, 4H:1 V on the <br />east slope and 3H:1V on the west slope. Rubble shall be deposited in the disposal area in such a <br />manner so that void spaces are minimized, and so that the top of the rubble is level. No piece of <br />rubble or debris may exceed a height of eighteen inches (18 ") above the mean elevation of the <br />surrounding material. <br />Materials targeted for demolition which lie within the footprint of the disposal area do not need to <br />8 <br />