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STATE OF Scott-DNR, Eric <eric.scott@state.co.us> <br /> COLORADO <br /> Climax 5 Dam Seepage Return Line <br /> 1 message <br /> Lazuk, Raymond <rlazuk@fmi.com> Wed, Sep 6, 2017 at 12:20 PM <br /> To: "Scott-DNR, Eric" <eric.scott@state.co.us> <br /> Eric, <br /> This email is to follow-up on our telephone conversation yesterday regarding the apparent leak in the 5 Dam Seepage <br /> Return Line from the 5 Dam Pump Station to the 3 Dam Pump Station. We have confirmed based on visual observations <br /> that a portion of the seepage in the 5 Dam seepage return line is surfacing in the interior of the Mayflower Tailing Storage <br /> Facility(TSF) near a buried valve, well away from the dam, and that the majority of the seepage is still reporting to the 3 <br /> Dam Pump Station. The 3 Dam Pump Station is used to pump both 3 Dam seepage and 5 Dam seepage to the Sludge <br /> Densification Plant(SDP)for stage 1 pH adjustment(pH 7) metals removal. The discharge from the SDP ultimately <br /> reports to the Mayflower TSF water pool which is then pumped to either the mill process water circuit or to the Property <br /> Discharge Water Treatment Plant(PDWTP)for stage 2 pH adjustment(pH 10)final metals removal before it is <br /> discharged to Tenmile Creek. The Mayflower TSF water pool also is at a pH of 7 and therefore the same metals removal <br /> that occurs at the SDP also is occurring in the Mayflower TSF. For this reason Climax does not expect to see any change <br /> in permitted effluent quality at the CDPS permit outfall. <br /> Given the location of the leaking line under the Mayflower TSF, there is no option to repair the existing line. Climax is <br /> therefore examining permanent options to replace the 5 Dam Seepage Return Line. Once a decision is made on line <br /> replacement Climax will address any regulatory requirements including permit modifications at that time. <br /> Please let me know if you need anything further regarding this matter. Our goal is to develop an appropriate strategy to <br /> replace the seepage return line as quickly as possible. <br /> - Ray <br />