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v M11 j 1 <br /> As part of our investigation of the London Mine over the past year, we have found that the <br /> aquifer is intruding into the workings of the London Mine from the 0210 Drift at a concentration <br /> of somewhat less than 0.3 mg/L dissolved zinc, while the water intrusion from the cross faults is <br /> entering the mine at a concentration of more than 10 times that concentration and flows between <br /> 40 and 100 GPM. We believe that dewatering from the axis of the syncline to the west of the <br /> mine workings can reduce the amount of otherwise untreatable background contamination <br /> entering the Mine and prevent the contact of the alkaline good quality groundwater with the <br /> Belden Shale and porphyry intrusive rocks that are pyrite-rich and metal-laden. The net result is <br /> that the load to the Creek may be reduced by several pounds each day, or as much as 60% of the <br /> TMDL for this segment of the stream during high flow, and several hundred percent of the <br /> allocated load at low flow. <br /> It is imperative that this work be completed in the 2017 summer work season so that the <br /> beneficial results of the dewatering can be presented at the Water Quality Control Commission <br /> hearings to be held in late summer 2018 (petition for hearing was granted by WQCC in January <br /> 2017). The outcome of that hearing will determine appropriate feasibility—based stream <br /> standards for Mosquito Creek and South Mosquito Creek. <br /> I welcome the opportunity to discuss this Amended NOI with any concerned party or with the <br /> Division. <br /> Sincerely, <br /> iNTineWater Finance LC <br /> Joseph G. Harrington, President. <br /> Copy: Kelly Morgan, CDPHE <br /> Park County Board of County Commissioners <br /> Lee Johnson, Attorney—Carlson Hammond and Paddock <br /> (Conceptual) Financial Warranty calculations <br /> 0.8 acre disturbed, $1,600. Credit for overlap with previous bond and unused disturbance, $600. <br /> Net increase in surface reclamation required, $1000. <br /> 2 drill holes, 24" bore hole, 650 feet depth in aquifer filled with bentonite gel, 350 feet above <br /> aquifer filled with cement grout to surface. $22,000 in cement. $8,900 in bentonite. <br /> Amendment of Belden (pyritic) drill cuttings with 2% lime, 4,400 lbs, $400. <br /> Grand total Financial Warranty required is estimated at $32,400. <br />