Laserfiche WebLink
3) OMI questions the use of the DMG Material Damage guideline levels as a basis for <br />evaluation of impacts given that they are more stringent than comparable EPA guidance <br />under the Clean Water Act (refer to Quality Criteria for Water, U.S. EPA 1986 w/ updates) <br />and reflect lower thresholds for agricultural than aquatic uses <br />OMI would have some practical limitations relative to reduction of mine discharge rates during <br />stream low flow conditions depending on the location and status of both ongoing mine recovery <br />efforts and flooded mine areas. As previously stated, it is OMI's intent to pump any excess <br />water out of the mine as soon as reasonably feasible, probably avoiding the low flow period of <br />late fall and winter. OMI does have some tlexibility relative to operation of the existing <br />underground mine water sump but feels that further operational limits or constraints may not be <br />reasonable or warranted given the considerations noted above. <br />We hope that this information is of value and appreciate your timely consideration in expediting <br />the required approvals. Please feel free to contact either Kathy Welt or me with any questions or <br />to further discuss the related operational considerations. <br />Best regards, <br />Montgomery Watson Mining Group for <br />Oxbow Mining, Inc. <br />Jerry M. Nettle <br />Senior Project <br />JMN:sIw <br />cc: L. Rourien/DMG <br />K. WeldOxbow <br />cc: <br />Ijyou do no[ receive all pages, or ijthere are any problems with this transmission, please call <br />303-938-8818. <br />