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Water from the initial dewatering operation and runoff from disturbed areas, piled material, and operating <br /> surfaces will be diverted to the settling ponds for detention and cleansing. The South Area will be dewatered <br /> and will not have a slurry wall;dewatering trenches will be located around the perimeter of all mining areas. <br /> Settling occurs in the trenches, and if necessary,settling ponds will be constructed at a point prior to discharge. <br /> Discharges will be directed to the South Platte River, at various points as designated within a State of Colorado, <br /> Division of Water Resources, Colorado Discharge Permit System(CDPS) permit. Monitoring of dewatering will <br /> be conducted in accordance with the CDPS discharge permit, which sets forth formal monitoring parameters <br /> including weekly visual monitoring for oil and grease. In accordance with the CDPS permit requirements, a <br /> Stormwater Management Plan(SWMP)will also be developed for this site. The SWMP identifies potential <br /> sources of pollution that may reasonably be expected to affect the quality of stormwater runoff from areas <br /> around the site and describes the implementation practices to be used to reduce the pollutants in stormwater <br /> discharges associated with the facility. <br /> Dewatering water pumped from the South Mine Area will be discharged to the downstream end of the Brighton <br /> Return Ditch(See Exhibit C-4) near the south east end of the mine limit. The water will flow directly into the <br /> South Platte River via the Brighton Return Ditch or a parallel discharge pipeline located within the ditch <br /> easement. <br /> Specific impacts to wells. <br /> A search of the State of Colorado Office of the Ste Engineer Database of wells on June 25 indicated four wells <br /> completed in the alluvial aquifer within 600 feet of the South Area. The potential impact to those wells and <br /> mitigation measure are described below. <br /> Bloom Wells <br /> The Bloom's have two wells completed in the alluvium(Permit Numbers 262132 and 2652132-A). They are <br /> classified for domestic use at 15 gallons per minute(gpm)and are located about 200 feet south of the Brighton <br /> Return Ditch. The discharge of the dewatering water to the Brighton Return Ditch will mitigate dewatering <br /> impacts to these well. <br /> Gary A. and Delores R. Baker <br /> The Baker well (Permit#101310) is located near the north west comer of the South Area about 100 feet from the <br /> mine limit. It is classified as stock watering only at 15 gpm. If this well is adversely impacted Al can provide the <br /> Bakers with livestock water. <br /> San Martin Caballero, LLC/Donald D. Stough <br /> The San Martin Caballero LLC well (Permit# 12379 R-R) is located near the south east comer of the South Area <br /> about 100 feet from the mine limit. It is classified as irrigation for 18 acres at 350 gpm. If this well is impacted Al <br /> can drill a replacement well further from the South Area. <br /> Aggregate Industries Tucson South Resource <br /> Permit#M-2004-044 112 Permit Amendment <br /> Page G-2 <br />