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III. Hydrologic Balance - Rule 4.05 <br /> A. Water Quality Standards and Effluent Limitations <br /> 1. There are eight sediment ponds and one freshwater pond at the West Elk <br /> Mine that treat drainage from the disturbed area. These ponds function as <br /> designed to ensure that applicable water quality standards and effluent <br /> standards are met per the requirements of CDPS Permit No. CO-0038776. <br /> 2. The Division proposes to grant small area exemptions from the use of <br /> sediment ponds, due to the limited size of the area, the fact that ponds and <br /> treatment facilities are not necessary for the drainage to meet the effluent <br /> limitations of Rule 4.05.2 and applicable State and Federal water quality <br /> standards for receiving streams, and due to the fact that no mixing of surface <br /> drainage with a discharge from underground workings will occur. The <br /> small areas to be exempted are located at the Sylvester Gulch fan site, the <br /> lay-down area between FW-I and MB-1, an area located downstream from <br /> the MB-5 inlet, the 1.2 million gallon water tank, the Lone Pine substation, <br /> the Lone Pine ventilation fan and associated facilities, ventilation shaft #3, <br /> degas pad, electric borehole pad, all topsoil and subsoil piles in Sylvester <br /> Gulch except the pile above the ventilation shafts, Sylvester Gulch substation <br /> and dewatering borehole pad [4.05.2(3)(b)(i)]. <br /> B. Diversions and Conveyance of Overland Flow <br /> 1. Sediment control ditches have been designed and constructed in compliance <br /> with Rule 4.05.3. Locations are shown on Maps 54 and 54b, and designs <br /> can be found in Exhibit 66. A summary of the designs can be found on <br /> Table 44 in Exhibit 66 of the permit document (4.05.3(2)). <br /> C. Stream Channel Diversions <br /> 1. The West Elk Mine does not propose any stream channel diversions; <br /> therefore, this section is not applicable. <br /> D. Sedimentation Ponds <br /> 1. Mountain Coal Company has constructed eight sediment ponds and one <br /> freshwater pond (FW-I). The ponds have been designed, constructed and <br /> maintained in accordance with the requirements of 4.05.6 and 4.05.9. The <br /> location of these ponds can be found on Map54 and 54b. The designs of the <br /> ponds can be found in Exhibit 66. The ponds are located as near as practical <br /> to the disturbed area and are not located within perennial streams according <br /> to 4.05.6(1)(6). <br /> E. Acid-forming and Toxic-forming Spoil <br /> 26 <br />