Section 312 IAC 25-6-80 - Underground mining; hydrologic balance; sediment control measuresAuthority: IC 14-34-2-1
Affected: IC 14-34
Sec. 80.
(a) Appropriate sediment control measures shall be designed, constructed, and maintained using the best technology currently available to do the following: (1) Prevent, to the extent possible, additional contributions of suspended solids to stream flow or to run-off outside the permit area.(2) Meet the more stringent of applicable Indiana or federal effluent limitations.(3) Minimize erosion to the extent possible.(b) Sediment control measures include practices carried out within and adjacent to the disturbed area. Sediment control measures consist of the utilization of proper mining and reclamation methods and sediment control practices, singly or in combination. Sediment control methods include, but are not limited to, the following: (1) Disturbing the smallest practicable area at any one (1) time during the mining operation through progressive backfilling, grading, and prompt revegetation as required in section 115(b) of this rule.(2) Stabilizing the backfilled material to promote a reduction in the rate and volume of run-off in accordance with requirements of section 112 of this rule.(3) Retaining sediment within disturbed areas.(4) Diverting run-off away from disturbed areas.(5) Diverting run-off using protected channels or pipes through disturbed areas so as not to cause additional erosion.(6) Using straw dikes, riprap, check dams, mulches, vegetative sediment filters, dugout ponds, and other measures that reduce overland flow velocity, reduce run-off volume, or trap sediment.(7) Treating with chemicals.(8) Treating mine drainage in underground sumps.Natural Resources Commission; 312 IAC 25-6-80; filed Jun 21, 2001, 2:53 p.m.: 24 IR 3551, eff Dec 1, 2001; readopted filed May 29, 2007, 9:51 a.m.: 20070613-IR-312070146RFA; readopted filed Sep 19, 2013, 10:12 a.m.: 20131016-IR-312130125RFAReadopted filed 3/26/2019, 3:40 p.m.: 20190424-IR-312190011RFA