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INTERFACE LINER <br /> SLOPE REINFORCEMENT DESIGN FOR SLOPES STEEPER THAN 6:1 <br /> WMU FU-10 FORWARD INC.LANDFILL <br /> PROBLEM: <br /> Estimate the thickness of subgrade fill required to support the WMU FU-10 interface liner on the south <br /> facing former Austin Road Landfill slope. <br /> GIVEN: <br /> These calculations were previously performed for the WMU D-94,D-97,D-98,D-99,FU-03,FU-04,FU- <br /> 05,FU-06 and FU-08 designs. Since the interface slope liner and LCRS components are approximately the <br /> same as for the previous designs,the methodology used in the previous calculations is applicable to the <br /> WMU FU-10 design. <br /> The methodology presented in Jang and Montero(1993)estimates the required subgrade fill thickness to <br /> bridge a 3 ft by 3 ft by 6 ft void under the liner system. The dimensions of the void were estimated by <br /> assuming a worst case scenario of an item as large as a refrigerator collapsing directly under the lining <br /> system. <br /> SUMMARY: <br /> 1. For the 5:1 Austin Road Landfill slope,the subgrade fill thickness should be approximately 4-ft. <br />