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-i7- VII. Alluvial Valley Floors - Rules 2.06.8 and 4.24 (con't) The sedi=ent pond is designed to retain runoff for a period of 24 to 36 hours. After allowing the sediment to settle out all water will be discharged from the pond. At no time will there be more than 2 acre-feet of water stored in the pond. The operation will have no adverse effect on water quality within the affected drainage. Another potential for an effect on surface water in East Salt Creek is related to the outcrop of the Cameo coal.seaa upstream of !lcClane Canyon. Because exploration indicated that mining will not progress into the saturated portion of the mined strata, discharge should not occur from these strata. The operation therefore, will not diminish the quantity or quality of East Salt Creek water in the tributary aquifer during this permit tern. Therefore, pursuant to 2.06.8(5)(ii), the Division finds the proposed operations will not materially damage the quantity and quality of water in surface and underground water systems that supply those alluvial valley floors or portions of alluvial valley floors. Alluvial Valley Floor Findings With Regard to Preserving Essential Hydrologic Functions- The potential for any effect on surface water quality and quantity in East Salt Creek vas discussed above. Even though the potential for impact is minimal, Salt Creek Mining Company has proposed to establish a monitoring network to verify these projections and vhich would identify detrimental effects if they were to occur. This aonitoring network is established to detect changes in surface and ground eater within the alluvial valley floor. Once successful reclamation of the operation is achieved the essential hydrologic functions of the alluvial valley floor will be restored. Coal material will be disposed of, topsoil vill be spread, all openings will be sealed and a stable, protective stand of vegetation will be established on the area. Therefore, pursuant to Rule 3.06.8(5)(iii), the. Division finds that the proposed surface coal mining and reclamation operation will preserve, throughout the mining and reclamation process, the essential hydrologic functions of the alluvial valley floor. - Rules 2.04.7(3). 2 Fortions of the application relevant to surface and ground water rights in [he vicinity of the mine have been submitted to the Office of the State Engineer, Division of Water Resources. The State Engineer's Office has determined that there are no problecs with the operation with respect to water rights.