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pit will probably not exceed 15-20 gpm, unless sign- <br />. ificant faulting is encountered. Only one other ground <br />water appropriation exists in Bolton Draw, that of the <br />Kerr Mine approximately 2 miles north. Neither drainage <br />of the pit, nor use of water from a well penetrating the <br />Pierre should affect this well. Furthermore, ground waters <br />being utilized are not in direct connection with the <br />weathered surficial aquifer and use of these waters should <br />not impact surface water rights. <br />Impact of Mining upon Surface Water and Surface Water Rights <br />Drainage from areas III, IV and V, as identified on Plate <br />IV, cross the lease tract. Drainage from area III will not <br />be affected by mining. Runoff from area IV behind the <br />• disturbed area will be channeled southward by a diversion <br />ditch back into Bolton Draw. The only area in which the <br />surface hydrology will be impacted is Zone V, the disturbed <br />area. <br />Precipitation currently contributed to the draw by Zone V <br />will be collected in the sediment pond and reused on the <br />' site. The 0.1 sq.mi. disturbed area comprises 0.9% of <br />the total drainage in Bolton Draw and 1,5% of the drainage <br />up gradient from the Bolton Draw Ditch. Considering the <br />small acreages involved, it is not anticipated that <br />collecting precipitation runoff in the settling. pond will <br />measurably diminish surface flows of the Bolton Draw Ditch. <br />20 <br />