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and SAE -2), at the former soil stockpile location adjacent to the lower access road <br />(SAE -4), and at the reclaimed Loma Loadout (SAE -2). SAE sediment controls <br />include silt fencing, vegetation cover, collection berms, and topographic containment. <br />SAE demonstrations are located in Appendix M (viii) [4.05.2(3)(b)]. <br />2. Certain disturbances associated with the coal mine waste disposal pile are located <br />within 100 feet of an ephemeral stream with a drainage area greater than one square <br />mile (Munger Creek). Pursuant to Rule 4.05.18(1), the Division specifically <br />authorizes disturbances within 100 feet of the Munger Creek channel in accordance <br />with specific plans outlined in Section 2.2.5 and 2.2 -6 of the application. Based on <br />drainage and sediment control designs and documentation included in the <br />application, the Division finds that surface coal mining operations will not cause or <br />contribute to the violation of applicable water quality standards [4.05.18(1)(a)]. The <br />Division finds that during and after mining, the water quantity and quality of the <br />stream will not be adversely affected [4.05.18(1)(b)]. Water quantity will not be <br />adversely affected, because the total drainage area of the disturbance to be <br />temporarily diverted into a sediment pond is less than one half of one percent of the <br />total drainage area of Munger Creek. There would be no measurable impact on the <br />quantity of water in Munger Creek, which flows only a few times each year in <br />response to storm runoff and briefly in spring due to snowmelt. Water quality of the <br />stream will not be adversely impacted due to the requirement that drainage and <br />sediment control diversions and a sediment pond as specified in the application will <br />be constructed prior to initiation of site development and will remain in place until <br />reclamation has been completed and the site adequately stabilized. Investigations <br />conducted by the applicant have demonstrated that the proposed disturbances are <br />outside of the 100 year flood plain of Munger Creek. <br />Based on monitoring data from an alluvial well at the site, the stream is not recharged <br />by an alluvial water table in the project vicinity, precluding the possibility of <br />contamination of the stream via the alluvium. The Munger Creek stream channel <br />will not be temporarily or permanently diverted [4.05.18(1)(c)]. <br />B. Diversions and Conveyance of Overland Flow <br />The collection ditches, diversions, and culverts conveying runoff from the disturbed areas at <br />the mine bench and along the Munger Canyon access and haul road will adequately carry the <br />flow resulting from the 10 -year, 24 -hour event. Ditches diverting undisturbed flow, and <br />conveying disturbed drainage from the coal waste disposal pile will adequately carry the flow <br />resulting from the 100 -year, 24 -hour event. <br />C. Sedimentation Ponds <br />A sediment pond has been approved and constructed to treat disturbed runoff from the <br />reclaimed coal mine waste disposal area (also referred to as the waste rock disposal site). A <br />18 <br />