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12, 13, and 14, T4N, R86W, adjacent to the Edna Mine using outflow from dischazge point 007 <br />presents an unacceptable risk of creating material damage to that alluvial valley floor. Rule <br />2.06.8(5)(a)prohibitsthe Division from approving a permit application if that application does not <br />demonstrate that mining operations would not materially damage the quality of surface water <br />systems supplying an AVF. Since the Edna Mine permit does not demonsVate that the application <br />of spoil spring water from NPDES point 007 would not result in material damage and due to the <br />unacceptable risk of such, the following stipulation is being added to the permit. <br />Water from NPDESpoinf 007 will not be used as surface irrigation water unless the operator first <br />demonstrates and the Division finds that irrigation with that water will not result in materia! <br />damage. <br />Based on the information above, the Division has detetTnined that an alluvial valley floor exists <br />within the affected or adjacent area and the following findings are in order for the alluvial valley <br />floor located on Trout Creek. <br />The Division finds that activities proposed by the applicant will not interrupt, <br />discontinue, or preclude farming on the alluvial valley floors that aze irrigated or <br />naturally subirrigated (4.24.3(1)). Material damage, however, could occur if water <br />from NPDES point 007 is used for irrigation without dilution by water from Trout <br />Creek. Therefore, the operator must provide a plan and demonstrate that the use of <br />water from the mine site for irrigation of the alluvial valley floor will not materially <br />damage the resource. <br />2. The proposed activities will not materially damage the quantity or quality of water <br />in the surface or groundwatersystem described above (4.24.3(3) and 2.06.8(5)(a)(ii)). <br />3. The proposed activities will comply with the requirements of the AM and the <br />Regulations with respect to alluvial valley floors (2.06.8(5)(a)(iii)). <br />4. Surface coal mining and reclamation operations will be conducted to preserve the <br />essential hydrologic functions of alluvial valley floors outside the permit azea and to <br />reestablish the essential hydrologic functions of alluvial valley floors within the <br />affected area throughout the mining and reclamation process (4.24.2). <br />5. An environmentalmonitoringsystern has been installed, and shall be maintained and <br />operated by the permittee on all alluvial valley floors during surface coal mining and <br />reclamation operations and continued until all bonds aze released in accordance with <br />Rule. 3 (4.24.4). <br />During the review of the original application for the Edna Mine petTnit, the Division determined that <br />Oak Creek was an AVF. P&M applied for, and the Division approved Permit Revision No. 3 to <br />declassify Oak Creek, where it is immediatelyadjacent to the eastern permit boundary, as an alluvial <br />Edru Mine 30 P~,mii Rrnewal No. 3 <br />