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Subject: RE: North Thompson Creek Mines (CDRMS PermitC-81-025/CDPSPermit CO-0029599) <br />Tom, <br />A few questions for you regarding any final bond release action. <br />1) Would they have to reclaim the ponds and remove all piping prior to bond release, or is <br />all required reclamation already complete? <br />2) What is the time frame for such final bond release? <br />It seems that the mine water from Mine 3 cannot always meet the iron standards on its own. <br />It may meet them after dilution with water from Mine 1, and/or after mixing in the ponds and <br />particulate settling occurs. <br />If the bond is released, and the piping is removed, Mine 3 will no longer be mixing with <br />other mine water. It appears on the maps that we have that Mine 3 is on the opposite side of <br />the river/creek from Mine 1. Is that correct? <br />Also, even if piping is to remain in place, there is no guarantee that the water will <br />continue to mix, as maintenance will be discontinued. <br />After internal discussions, I think we agree that the permit should not have been terminated <br />as the mine water from mine 3 does not always meet the standards with out treatment. We <br />would like to see if DRMS would hold of on any final bond release, so that some of these <br />issues could be "ironed" out so to speak. This may include the WQCD sending a letter to the <br />permittee stating that they need to reapply for a discharge permit. <br />Again, thank you for contacting us on this prior to the final action. <br />Andrew <br />Andrew Neuhart <br />Industrial Permits Unit <br />Water Quality Control Division <br />4300 Cherry Creek Drive South <br />Denver, CO 80246-1530 <br />phone:303-692-3655 <br />fax: 303-782-0390 <br />email: andrew.neuhart@state.co.us <br />Visit our web site at: <br />www.cdphe.state.co.us/wq/PermitsUnit <br />>>> "Kaldenbach, Tom" <Tom.Kaldenbach@state.co.us> 3/3/2008 9:41 AM >>> <br />Andrew, <br />On re-reading my email I see that I did not mention that after passing the through the <br />passive treatment ponds, the iron content of the mine water discharge to North Thompson Creek <br />(at the former 001 outfall <br />location) have always been less than 1 mg/1. The iron concentrations noted in my email are <br />for the mine water discharges before they pass through the treatment ponds. <br />Thanks for looking into this. <br />Tom <br />2