(0215, 0402, 0409)
E.S. Wagner Company was awarded three contracts from Allied Waste located in Carey, Ohio over a period of two years to complete the construction of a new landfill cell and to relocate 400,000 cubic yards of trash within their facility, County Environmental of Wyandot.
The initial contract required the removal of 200,000 cubic yards of trash from the unlined portion of the facility and placed in accordance with the final contour plan in the lined section of the facility. Once this trash material was placed, it was covered with 20,000 cubic yards of transitional soil cover.
The second contract also required the relocation of 200,000 cubic yards of trash from an unlined portion of the facility to an active slope area in the lined portion of the facility. Similar to the first contract, the relocated trash was placed and graded in accordance with the final contour closure plans for the cell. After completion of the trash relocation placement and grading activities, E.S. Wagner Company placed 32,000 cubic yards of clay interim final cover over the exposed trash slope.
The management of leachate during the trash excavation activities required E.S. Wagner to be innovative and diligent to eliminate the commingling of landfill leachate with surface water/groundwater. Through careful planning and attention to detail, E.S. Wagner Company was able to maintain a separation barrier between the landfill leachate and surface water/groundwater drastically reducing the amount of leachate generated thus saving Allied Waste significant sums of money.
The third contract was to construct a 9.2 acre new landfill cell. Unlike most landfill construction in Ohio, the cell at this facility was not excavated, but built up from the existing ground level.
To begin the landfill construction, E.S. Wagner excavated 100,000 cubic yards of earthen material from an on-site borrow source and placed it as structural fill to form the footprint of the new landfill cell. In addition to the structural fill placement, 15,000 cubic yards of trash and a temporary sump was removed to facilitate the tie-in of the new landfill cell to the existing adjacent landfill cells. Because the temporary sump had to be eliminated, a temporary leachate collection and by-pass pumping system was installed to allow for leachate management during construction of the new cell.
With the footprint of the new cell established, E.S. Wagner installed 51,000 cubic yards of re-compacted clay liner which was then covered with 400,000 square feet of 60 mil HDPE geomembrane liner. The leachate collection system included the placement of 34,500 cubic yards of shredded tires to function as the drainage layer, 4,500 linear feet of 6 HDPE leachate collection pipe, 2,500 linear feet of 6 HDPE leachate force main pipe and 200 linear feet of 18 leachate collection slope riser servicing two leachate collection sumps.
Because the location of the new cell cut off existing access routes within the facility, E.S. Wagner constructed 6,300 linear feet of permanent access road to service the existing landfill cells and the newly constructed landfill cell.
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