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direct pif pumping into Pond 007 may occur if conditions warrant. These procedures have been <br />approved in WFC's NPDES Permit CO-0000213. Actual water flow velocity going into Pond 007 <br />will be controlled with adequate energy dissipators (i.e., rock riprap, geotextiles, meta! or concrete <br />energy dissipator boxes, etc.) or discharged onto non-erodible bedrock material. This will minimize <br />erosion of the pond banks. <br />Pit dewatering will have an insignificant impact on Pond 007, see Attachment 2.05.3.(3)-1. Pit <br />dewatering will be sporadic versus continuous. The flow rate of one to two cubic feet per second <br />or less compared to the designed 10-year, 24-hour peak inflow rate of 123.7 cubic feet per second <br />is very insignificant. In addition, pit water high in suspended solids will be allowed to set for a period <br />of time so the solids are allowed to settle out of the water and will remain in the active pit area. <br />Only after the pit water is clear, will it be pumped from the pit into Pond 007. Further more, all <br />discharge from Pond 007 will be in accordance with applicable discharge permits. <br />Pond 007 will be maintained until the disturbed areas are reclaimed and the vegetation success <br />requirements of Section 2.05.4(2)(e), Revegetation, are met, the untreated drainage from the <br />disturbed area ceases to contribute additional suspended solids above natural conditions, and the <br />drainage leaving the pond meets applicable State and Federal water quality requirements, if any, <br />for the receiving streams. Pond 007 will remain after reclamation for stock use as requested by <br />the landowner-San Miguel Power. This is discussed in detail in Section 2.05.4(2)(c) Backfilling and <br />Grading. <br />The sedimentation pond slopes will be protected from erosion where surface runoff enters the pond <br />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. One of, <br />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 <br />concentrated in a particular area, then this area will be improved to accept the runoff. In <br />areas where no natural armoring is present, the drainage bottom or channel will be <br />reshaped, if needed. The channel bottom will either be seeded, covered with erosion <br />matting and seeded, or rocked. The method used will, of course, depend on site <br />r1 <br />LJ <br />(REVISED 11!00) 2.05.33) - 6 <br />