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River by the Corps of Engineers, these inflow/outflow channels will convey flood flows into the cells <br />more frequent that a 10-year event and possibly more frequent than a 5-year event. <br />Inflows to the mined cells will be conveyed through the grass-lined channels at non-erosive velocities <br />less than 5 feet per second. In the vicinity of the mined cell, higher velocities would be expected as the <br />inflow runs down the 4:1 side slope of the reclaimed cell. Slope protection such as a turf reinforcement <br />mat or an articulating concrete block revetment is recommended to protect the rundown portion of these <br />reclaimed slopes. Final design of this slope protection will be prepared prior to construction. <br />PA01381afarge\0138.013 Parsoms Permit\Slope Stability\Parsons Stability Exhibit rev4_1-18-10 with MAS tcxt.doc <br />Parsons Mine <br />DRMS 112 Permit <br />Page SE7 of SE7