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© COLORADO <br /> Division of Water Resources <br /> " Department of Natural Resources <br /> Response to Consideration of Limited Impact Operation Reclamation Permit <br /> Application <br /> DATE: July 31, 2023 <br /> TO: Elliott R Russell, Environmental Protection Specialist <br /> FROM: Kate Fuller, Water Resources Engineer <br /> RE: London Mine, Permit No. M-2023-15 <br /> Applicant/Operator: MineWater, LLC <br /> Phone Number: 720-883-6700 <br /> NE'/a NEIA Section 18, Township 9 South, Range 78 West, 6th P.M. <br /> Water Division 1, Water Districts 23, Park County <br /> CONDITIONS FOR APPROVAL <br /> ® The proposed operation does not anticipate exposing groundwater. Therefore, exposure of <br /> groundwater must not occur during or after mining operations. Dewatering operations at the site <br /> must be in accordance with all terms and conditions of the decree entered in case no. 91CW0077. <br /> ® Any stormwater runoff intercepted by this operation that is not diverted or captured in priority <br /> must be released to the stream system within 72 hours; otherwise the operator will need to make <br /> replacements for evaporation. <br /> COMMENTS: The London Mine is two historically mined sites of 9.9 acres located approximately 5 miles <br /> west of the Town of Alma, Colorado. The subject application is for a 110(d) Limited Impact Designated <br /> Mining Operation Permit. <br /> The South London Stockpile area consists of 3.9 acres of waste materials from previous mining operations. <br /> The proposed operations will remove the material to the Central Extension and Sorting Plant area, which <br /> consists of 6.0 acres, where the material will be sorted. The Central Extension and Sorting Plant area has <br /> roadways, structures, level pad areas, a runoff control pond, and waste rock dumps. Both areas include <br /> waste rock, low grade ore, mining structures, water impoundments, and roads. <br /> The runoff is contained and directed to an existing discharge sedimentation pond on the site. The <br /> applicant should be aware that any stormwater runoff or precipitation intercepted by this operation must <br /> infiltrate into the ground or be released to the stream system within 72 hours, otherwise the operator will <br /> need to obtain a plan for augmentation or substitute water supply plan to make replacements for the <br /> evaporation of such water captured out-of-priority. <br /> Waters from the London Water Tunnel were decreed as developed non-tributary waters in case no. W7538 <br /> and consolidated cases nos. W8036(75) and W8256(76) for a total of 874.37 acre-feet per year at rates of <br /> flow ranging from 0.68 cfs to 1.59 cfs, plus 100 acre-feet per year at rates specified in case no. W7538. <br /> On March 24, 1953, in CA 3286, Priority no. A-213 was given a 1932 priority for 5 cfs of tributary water <br /> which came from the London Water Tunnel. An average of 7.4 cfs of recharge water reaches the London <br /> Syncline, including waters decreed in case no. W7538 and consolidated case nos. W8036(75) and <br /> W8256(76). The allowed uses of this 7.4 cfs which were decreed in case no. W8314-76 were changed in <br /> case no. 91CW0077 to commercial, industrial, municipal, fire protection, manufacturing, irrigation, fish <br /> of coo, <br /> 1313 Sherman Street,Room 821,Denver,CO 80203 P 103.866.3581 htt09:/1dwr.c0lorad0_4ov I ;o <br /> Jared S.Polis,Governrr I Dan Gibbs,Executive Director I Kevin G.Rein,State Engineer/Director <br /> /876 % <br />