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Updates and modifications to the mine pit dewatering plan are described in Section 2.05.3(3), <br />subsection 6. <br />Pit dewatering will have an insignificant impact on Pond 007, as shown in Attachment <br />2.05.3.(3)-2. Pit dewatering will be sporadic versus continuous. The flow rate of one to two <br />cubic feet per second or less compared to the designed 10 -year, 24-hour peak inflow rate of <br />123.7 cubic feet per second is very insignificant. In addition, pit water high in suspended solids <br />will be allowed to set for a period of time so the solids are allowed to settle out of the water and <br />will remain in the active pit area. Only after the pit water is clear, will it be pumped from the pit <br />into Pond 007. Furthermore, all discharge from Pond 007 will be in accordance with applicable <br />discharge permits. <br />Pond 007 will be maintained after reclamation as requested by the landowner. The demonstration <br />that this pond retention is in compliance with Rule 4.05.9(13) is included in Attachment <br />2.05.3(3)-16 Demonstration for Retention of Pond 007. <br />The sedimentation pond slopes will be protected from erosion where surface runoff enters the <br />pond area. <br />Monitoring for rills and gullies on the pond and other reclaimed slopes will be carried out on a <br />periodic basis; the monitoring being geared to those periods after spring snow melt and during <br />required quarterly pond inspections. <br />Occurrence of excessive rills and gullies will result in implementation of the following plan. <br />One of, or a combination of, the following options and corrective methods will be employed: <br />If it is determined that the topography of the regraded area is such that drainage is concentrated <br />in a particular area, then this area will be improved to accept the runoff. In areas where no <br />natural armoring is present, the drainage bottom or channel will be reshaped, if needed. The <br />channel bottom will be seeded, covered with erosion matting and seeded, or rocked. The method <br />used will, of course, depend on site conditions. Continued observations will be made of this area <br />for problems or necessary maintenance. <br />On slopes where no swale or defined channel exists, regrading, or disking, or chisel plowing will <br />be performed, depending on the extent of the erosion. Reseeding will then take place. <br />In addition to the above, contour furrows in and above the erosion area may be constructed to <br />trap and slow down the runoff. Straw dikes can also be used where appropriate to control runoff <br />and promote revegetation. <br />Page 2.05.3(3)-6 March 2016 (MR -98) <br />