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drainage to meet effluent limitations of Rule 4.05.2 and applicable State and <br />Federal water quality standards for receiving streams (4.05.2(3)(b)(ii)). <br />B. Diversions and Conveyance of Overland Flow <br />1. The Division does not propose to approve a permanent diversion (4.05.3(2)). <br />2. The Division approved construction of a diversion on an existing landslide <br />(4.05.3(4)). <br />C. Stream Channel Diversions <br />The Division does not propose to approve the diversion of an ephemeral stream <br />draining at least one (1) square mile, an intermittent or a perennial stream <br />(4.05.4(1) and (4)). <br />2. Channel lining structures, retention basins, and artificial channel roughness <br />structures are proposed for use to control erosion. These means were approved by <br />the Division, since they are necessary to control erosion, they are stable and will <br />require infrequent maintenance (4.05.4(2)(a)). <br />D. Sediment Ponds <br />The Division approved alternative design criteria or specifications for use in <br />sediment pond design and/or construction. The gob pile pond (Pond D) has an <br />embankment with slopes steeper than typical requirements. BRL provided the <br />required geotechnical stability analyses to justify the implementation of steeper <br />embankment slopes. Sediment pond design details are presented in Section 2.05 <br />and Volume IIl, Exhibit 8 of the permit application document (4.05.6(11)). <br />E. Acid-forming and Toxic-forming Spoil <br />1. Based upon information provided by BRL, the Division does not anticipate that <br />any acid-forming or toxic-forming spoil will be encountered during the operation <br />of the Bowie No. 2 Mine (4.05.8(3)). <br />F. Impoundments <br />The applicant has not proposed the use of alternative design criteria and <br />specifications for impoundment design and construction (4.05.9). <br />G. Surface and Groundwater Monitoring <br />The applicant will conduct monitoring of surface and ground waters in a manner <br />approved by the Division. The surface and ground water monitoring plan is specified <br />in Section 2.05.6(3)(b)(iv) of the Bowie No. 2 Mine permit application (4.05.13(1)). <br />BRL monitors surface water quantity and quality in perennial streams, irrigation <br />ditches, ephemeral drainages, and several springs, both upstream and downstream <br />from the areas affected by mining. Ground water levels and quality are monitored in <br />the D-2 coal seam, the B-2 coal seam and the North Fork alluvium. Monitoring and <br />30