2018-01-31_PERMIT FILE - C2009087A (3)

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RULE 2 - PERMITS «hicll existed prior to mine development. The 10110\\i1hg sections discuss the details ofthe various components Of the hydrologic protection plan. Components of Hydroloyie Protection Plans The hvdrologic protection plan outlines specific measures for PS('N1 that \\ill be taken to: • AN oid acid or toxic drainage • Prevent additional contributions ofsuspended solids to area drainages • Control runoff and erosion • Protect or replace affected water rights • Restore approximate pre - Inkling recharge capabilities Specific prevention. control. and mitigation ]Measures will include liniltino the area Of surface disturbaIce: construction. operation. and maintenance Of all effective drainage and sediment control sj'stern: controlled collection. storacle, use, and recycling Of Millie drainage: and effective reclamation Of surface disturbance areas and restoration of surface drainage patterns. In addition to descriptions of specific hvdrologic control and mitigation measures. compliance xvith specific applicable design standards and requirements are addressed and potential adverse hydrologic consequences specific to the site are identified in the Probable hydrologic Consequences (PHC) determination. Protection of Surface Water Quantity and Quality PSCM has incorporated specific control and initlgatlon measures in the proposed 111 ring. processing. and reclamation plans to effectively prevent or minimize significant mining - related impacts on surface water quantity and quality. Surface eater systems NNill be protected by limiting surface disturbance: controlling surface runoff and erosion: handling earth materials, any ground water dischar,es. and runoff in a manner that minimizes the formation of acidic or toxic drainage. prevents additional contributions of suspended solids to strearnflow outside of the permit area, and otherwise prevents pollution of surface water. As needed, surface water treatment facilities may also be used to protect surface water. PSCM's mining operations and related activities have the potential to affect surface water quantity through modification of surface runoff characteristics and increased sediment contributions from surface disturbance areas; consumptive use of surface water for mining operations and support activities; any discharge of mine water to the surface system; and discharge of sediment and other potential pollutants from mining- related surface activities. Mining and related operations may also affect surface water quality by modifying surface water chemistry, altering pH, and increasing concentrations of TSS, TDS, and specific chemical constituents. Specific activities, identified in the Probable Hydrologic Consequences, which may potentially impact surface water quantity and quality, include the following: • Removal of vegetation and soil materials from disturbance area • Realignment and culverting of portions of small ephemeral channels or ditches • Surface placement of coal (stockpiling) • Operation of drainage and sediment control structures Midterm Review 2.05 -95 Revision 04/2013