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§2.05 APPLICATION FOR PERMIT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -- <br />MINIMUM REQUIREMENTS FOR OPERATION AND RECLAMATION PLANS. <br />• 2.05.6 Mitigation of Surface Coal Mining Operation Impacts. (Cont'd.) <br />(1) (b) (i) (Cont'd.) <br />(ii) (A & B) <br /> All surface drainage from disturbed lands is <br /> routed through sedimentation facilities. These <br /> facilities are monitored and maintained in <br /> accordance with 2.05.3 (3) (C), Operations Plan, <br /> Existing Structures, and will remain so until <br /> the disturbed area has been restored. <br /> The sedimentation facilities have been designed <br /> and constructed to store a precipitation event <br /> equal to a ten-year, 24-hour storm. A recording <br /> precipitation gauge manufactured by Belfort <br /> Instrument Company in Baltimore, Maryland, has <br /> been installed at the mine site to monitor <br /> rainfall events, and the lowermost sedimentation <br /> dam (pond #4) is equipped with a universal <br /> recording stream gauge to monitor discharges <br /> over the spillway from the lowest dam on the <br /> mine site. In this way, the design storm will <br /> be detained a minimum of 29 hours. See the <br /> Ponds, Impoundments, and Dams Appendix in Volume <br /> 8A. <br />~i <br />/~2-(08 <br />/1VPRovED <br />~~~9 ~a y <br />Revised 08/01/84 <br />Revised 10/12/86 <br />Revised 10/01/8'7 <br />Revised 9/21/01 <br />112 <br />