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G-12 <br /> "footprint" precipitation), water will be routed to a proximal localized low area within the pit <br /> depression, where it will be allowed to naturally infiltrate into the underlying porous soils and/or <br /> evaporate. <br /> All aspects of ran-on and/or run-off management will be addressed in an appropriate manner <br /> through administration of the facility's CDPS General Construction Permit(COR400000) during <br /> facilities construction;and,the CDPS General Permit(COG500000)for Discharges from Sand and <br /> Gravel Mining and Processing, once operational. This will include implementation of all <br /> appropriately engineered"control measures" (formerly"best management practices"), as defined <br /> within the respective Stormwater Management Plan(s)(SWMPs). <br /> The facility will not be subject to any process water discharge permit as all plant operations will be <br /> fully contained and will employ maximum recycle of all process waters within the process circuit. <br /> Thus,the facility will be operated as a"zero-discharge"facility. <br /> (4) The Operator/Applicant shall provide an estimate of the project water requirements including <br /> flow rates and annual volumes for the development, mining, and reclamation phases of the <br /> project. <br /> CSC anticipates minor water usage during the"development"phase, as such usage will likely be <br /> limited to dust suppression and/or geotechnical(i.e.,moisture content additions to achieve specified <br /> compaction criteria,etc.)requirements associated with facility construction. At this juncture,CSC <br /> estimates this usage to be on the order of 30,000 to 50,000 gallons per day(gpd)for an anticipated <br /> duration of 3 to 10 months. <br /> CSC has estimated that the Keenesburg No. 3 Mine processing plant in-circuit water capacity will <br /> be approximately 430,000 gallons in total,in order to sustain operations at a rate of approximately <br /> 11,500 gallons per minute(gpm). Maximum recycle is employed in the process; therefore,make- <br /> up water requirements are anticipated to be approximately 8%of total,or 920 gpm,with make-up . <br /> requirements largely attributed to evaporative and other process-related losses as well as residual <br /> moisture content in process waste fines,etc. The plant water supply will be provided direct to the <br /> plant facilities,with storage capacity also available within the process sumps,clarifier unit,and the <br /> 50,000 gallon capacity recycle water tank. <br /> Keenesburg No. 2 Mine_112 Reclamation Operation—November 22, 2019 <br />