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Information dealing with sediment and runoff control is presented in Sections 2.3.4, 2.2.5, <br />Appendices M(vii) and M(viii), and Figures 2.2-4,2.2-6,2.2-7, and 2.2-15. This information <br />has been reviewed by the Division, and the plans have been found to be in compliance with <br />the.applicable requirements of Rule 4.05. <br />Disturbed runoff from the coal waste disposal site will pass through a sediment pond <br />designed to ensure that all discharges meet effluent limits established in the CDPS discharge <br />permit issued by the Water Quality Control Division. Two specific findings are required to <br />allow for exemptions pertinent to this section. The first finding allows for small area <br />exemptions (SAE's) applicable to specified disturbed area locations. The second finding <br />allows for certain disturbances associated with the coal mine waste disposal site to be within <br />100 feet of Munger Creek. <br />1. The Division proposes to grant five small area exemptions from use of sediment <br />ponds. The exemptions are granted due to the limited size of specified areas at the <br />mine and loadout, and due to the fact that ponds and treatment facilities are not <br />necessary for the drainage to meet the effluent limitations of Rule 4.05.2 and <br />applicable State and Federal water quality standards for receiving streams. No mixing <br />of surface drainage with a discharge from underground workings will occur. The <br />small areas to be exempted are located on the reclaimed mine portal bench (SAE-1 <br />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 />22