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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 III, Exhibit 8 of the permit application document (4.05.6(11)). <br />E. Acid-forming and Toxic-forming Spoil <br />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 <br />specified in Section 2.05.6(3)(b)(iv) of the Bowie No. 2 Mine permit application <br />(4.05.13(1)). BRL monitors surface water quantity and quality in perennial <br />streams, irrigation ditches, ephemeral drainages, and several springs, both <br />upstream and downstream from the areas affected by mining. Ground water <br />levels and quality are monitored in the D-2 coal seam, the B-2 coal seam and the <br />North Fork alluvium. Monitoring and reporting of mine inflows was added to the <br />hydrology monitoring plan with the approval of Permit Revision No. 2. In PR-10, <br />a requirement was added to monitor and report mine inflows in Hubbard Creek <br />until it is established that room and pillar mining beneath Hubbard Creek is not <br />affecting the creek water. The operator has also committed to monitoring Dove <br />Gulch and sending reports to the USDA-Forest Service as well as to the Division <br />in the annual hydrologic report. Additionally, in PR-10, the operator has <br />demonstrated that ground water baseline and operational monitoring down <br />gradient of the mining proposed in PR-10 will not be needed. The operator was <br />able to show that the water quality in the B-seam and above does not change <br />significantly from south to north. <br />H. Transfer of Wells <br />The Division does not propose to approve the transfer of any exploration or <br />monitoring well (4.05.15(13)). <br />1. Discharge of Water into an Underground Mine <br />1. The Division is not proposing to approve the diversion of water from a surface or <br />underground mine into underground mine workings. <br />28