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azea and to reestablish the essential hydrologic functions of alluvial valley <br />floors within the affected azea throughout the mining and reclamation process <br />([Rule 4.24.2). <br />5. An environmental monitoring system has been installed, and shall be <br />maintained and operated by the permittee on all alluvial valley floors during <br />surface coal mining and reclamation operations and continued until all bonds <br />aze released in accordance with Rule 3 (Rule 4.24.4). <br />Oak Creek AVF <br />During the review of the original application for the Edna Mine permit, the Division <br />determined that Oak Creek was an AVF. P&M applied for, and the Division approved <br />Permit Revision No. 3 to declassify Oak Creek, where it is immediately adjacent to the <br />eastern permit boundary, as an alluvial valley floor as defined in Rule 1.04(10). The area <br />that is no longer classified as an AVF extends from the southeastern permit boundary <br />north to and including the Routt County Road 179 crossing over Oak Creek. This area <br />includes the NE'/4 Section 19; NW'/< Section 20; W%SW'/o and W'/=SW'/4NWY< Section <br />17, Township 4 North, Range 85 West of the 6th Principal Meridian. The limits of <br />declassification aze defined on Exhibits 4.6-10 and 4.6-11 in the Edna Mine PAP. <br />Portions of Oak Creek upstream and downstream of this area remain a designated AVF. <br />The Edna Mine would have little or no impacts on the Oak Creek AVF because the AVF <br />is upgradient from Edna's ground water flows and would receive only occasional, <br />neglible surface water runoff from the mine. <br />C-1980-001 Permit Renewal 5 Findings Page 33 of 33 Pages <br />