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If the point of compliance well exhibits a change in water level that indicates that a nearby <br /> domestic well would not be capable of producing a residential supply,the neighboring well <br /> owners will be contacted to confirm operating conditions in their well. If their well is exhibiting <br /> conditions associated with a decline in performance due to a depressed water level,the <br /> Applicant will work with the well owners to investigate the pumping conditions in their well and <br /> either 1) lower the pump equipment in the well or 2) replace the neighboring well with a deeper <br /> well. A water level change of at least 20 feet would need to be observed in the point of <br /> compliance well to indicate that mining operations are causing problematic water level changes <br /> in neighboring wells. Because of the distance between the mine and existing wells and the <br /> geologic separation between the mine and the wells,we believe that it is extremely unlikely that <br /> any such impacts will occur. <br /> If the point of compliance well exhibits an exceedance of ground water quality conditions,the <br /> Applicant will contact the neighboring well owners to confirm whether the condition is <br /> exceeded in the neighboring wells through water quality testing and a water supply will be <br /> delivered to a new cistern at the neighbor's residence for use until the exceedance is no longer <br /> present at the compliance well. Water will continue to be delivered until the exceedance is no <br /> longer present or until the end of the mining operations. <br /> 2.7.5 Dewatering and Runoff Pollution Protection Plan <br /> Consistent with CDPHE and DRMS rules,the proposed mining will need to be performed in a manner to <br /> prevent unnecessary degradation of the property and adjacent lands. <br /> Protection of the property and adjacent lands from runoff and dewatering/ process water discharge <br /> impacts and pollution will be managed separately. Stormwater runoff water from surrounding land will <br /> be captured in stormwater channels and directed to the natural drainage;flowing from the area at <br /> historic rates. Stormwater runoff from the mill site will be channeled to the sedimentation <br /> pond/stormwater detention pond at the north end of the overburden stockpiles. Dewatering and <br /> process water not reused in the milling process will be discharged to the sedimentation pond. <br /> 2.7.5.1 Stormwater Sedimentation and Detention Pond <br /> Diversion channels, drainage ditches, culverts and sediment barriers will be implemented at the <br /> surface and around roadways to reduce sediment load and slow surface water runoff. All <br /> surface runoff will be diverted through sediment control devices such as silt fences, check dams, <br /> vegetated swales, rip rap or other appropriate devices before runoff enters any existing <br /> drainage. <br /> Clean water will be routed around tailing piles and low seepage rates are expected from tailing <br /> pile areas. Tailing pile areas will include buttress and shell placement areas as well as <br /> underdrain systems that will capture any seepage from tailing areas and discharged to a <br /> geomembrane-lined contact water pond. <br /> It is noted that the drainages that cross the property are mostly dry and flow only during high <br /> precipitation events. <br /> 43 <br />