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<br />mining land use, the road complies with all applicable performance standards, and <br />the landowner requests in writing to the Division that the road (or a segm~:nt of it) <br />is to be lefr open for further use. <br />II. SUPPORT FACILITIES -Rule 4.04 <br />Information on mine support facilities is found in Volume 2, Tab 12 of the <br />permit application. A summary is found in the Summary Section of this <br />document under "Description of Operations and Reclamation Plan." <br />Specific findings for Rule 4.04 aze not applicable. <br />III. HYDROLOGIC BALANCE -RULE 4.05 <br />A. Water Oualitv Standards and Effluent Limitations <br />Receiving stream standazds for the Yampa River and its tributaries have been <br />set by the Colorado Department of Health in their publication, "Classification <br />and Numeric standazds for Upper Colorado River Basin and North Platte <br />River (Planning Region)". Dry Creek is within segment 12 of the Upper <br />Colorado River sub-basin and basin. Colorado Department of Health NPDES <br />(National Pollution and Dischazge and Elimination System) limitations on <br />dischazge and the Division's standazds for determining material damage to the <br />hydrologic balance ("Division Procedures for the Assessment of Mat~:ria] <br />Damage with Respect to Alluvial Valley Floors, the Cumulative Hydrologic <br />Impact Assessment and Subsidence at Coal Mines") aze based in part on these <br />standazds. <br />Most disturbed azea drainage passes through one of two existing ;>ediment <br />ponds (see SAE's described in # 2, below). Dischazges from these ponds <br />aze monitored to verify compliance with water quality standazds surd <br />effluent limitations (4.05.2(2)). <br />2.. The Division has approved three small areas (SAE'S) to be exemF~ted from <br />the use of sediment ponds due to the limited size of areas and due to the <br />fact that ponds and treatment facilities aze not necessary for the drainage <br />to meet the effluent limitations of Ruie 4.05.2 and applicable State and <br />Federal water quality standards for receiving streams. These areas have <br />also been exempted because no mixing of surface drainage with z. <br />discharge from underground workings will occur. Exemptions from use <br />of sediment ponds have been approved for three topsoil stockpiles. <br />Documentation of these exemptions is found in Volume 12, Tab 12 of the <br />permit application (4.05.2(3)(b)(i)). <br />is <br />