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Two Rivers Gravel Pit Mine <br /> Riverside Berm Failure Analysis <br /> and Flood Control Mitigation Plan <br /> 7ech"olooicess January 22,2020 <br /> EFITRAL IT <br /> Berm Crest FILL.TIME EV VS UT EV <br /> 4685.p <br /> HesdeuttMintates(Embenk7entsbpe shess <br /> 4G86.0 <br /> 4675.0 <br /> 467a_p <br /> 4665.0 <br /> Best <br /> 4W p --Fil I Time <br /> d Hee dcuting st <br /> Pit Toe iosrr. <br /> _F__p <br /> RON III <br /> -EC p <br /> 1 1.5 2 ?S 3 __ 4 4.5 <br /> Time{hr) <br /> Figure 5 Central Pit <br /> Pit fill time and water surface elevation vs. head cut elevation for 150 ft riverside berm. <br /> pg. 18 <br />