Laserfiche WebLink
RULE 2 - PERMITS <br />and for a short period of time follmNing diversion Offlo«s until the surface stabilization is achieved <br />All proposed culverts are located along existing or proposed ephemeral ditches, none are located in <br />flo«ino streams. PSCM Mill effectively minimize the impacts to stream flows and sedimentation <br />hl' SchedUlillg culvert placement. removal, and post- inining stream channel restoration dUrim, d►'}' <br />Weather, if feasible: utilizing Silt fences to minimize potential sediment contributions both during <br />and fO11ONvirlg construction: extensive use of' riprap and other erosion control materials in both the <br />channel and adjacent bank areas: and. revegetatin- all construction disti►rbance areas. <br />There are negh`alble potential ]Mining- related impacts on water rights and use in Little Grassy Creek. <br />PSCM holds Sufficient eater right, \\ithin the Grassy Creek basin to offset any decreases. Excess <br />mine drainage not Used for undergrOUnd operations. which does not result 111 any reduction III <br />Surface floes due to the lack of a direct hydraulic connection. \\ill probably result in some variable <br />discharge of excess mine dater to the Slll'faC� S1Stel11. CIfCCtl\Cly aul`anlellting surface floes oil a <br />year -round basis. PSCN1 is committed to mitigate an\ significant adverse impacts to offsite water <br />rights through augmentation of any affected water rights. development of alternative watering <br />facilities. or other appropriate mitigation measures. <br />Potential Acid- or Toxic- Producing Materials and Drainage - Comprehensive discussions of the <br />chemical characteristics of coal and other materials to be disturbed or handled in conjunction with <br />Winning and related activities are presented in Section 2.04.6, Geology Description. Evaluation of <br />all available chemical analyses has resulted in no indications that the sampled materials are or will <br />be potentially acid - or toxic - forming. In addition, ongoing experience with mining the Vdadge Coal <br />wain at the Seneca II, Foidel. and Yoast mine sites indicates there is no significant potential for <br />development of acidic or toxic drainage as a result of any mine water discharge or resaturation <br />following mine abandonment and sealing;). <br />'A'llile underground mining may result in shifts in surface and ground water chemistry and changes <br />in TDS levels and concentrations of specific chemical components discussed above, these changes <br />in water quality will be localized and are not expected to result in any significant adverse impacts <br />Oil surface or ground water systems or the planned postnl►n►ng land use. Given these <br />considerations, no special measures are necessary to control or mitigate potential impacts from acid - <br />or toxic - forming materials. However, mine drainage control, controlled placement and off -site <br />disposal of non -coal wastes. and sealing of mine openings will certainly serve to minimize any <br />potential minor impacts. <br />Potential for Interruption, Diminution, or Contamination of Water Supply Sources - As <br />previously discussed, PSCM's mining and related operations are not expected to adversely impact <br />any surface or ground water sources or water rights. Consequently, there is no need to explicitly <br />address provisions for replacement of impacted water rights at this time. In the unlikely event <br />however, that proximate contamination, diminution, or interruption does occur and can be <br />documented as resulting from their existing or proposed mining and related operations, PSCM will <br />mitigate the associated water rights impacts through discussion and development of a cooperative <br />agreement with any affected water rights holder(s). Potential mitigation options may include but <br />will not be limited to replacement or augmentation of affected water rights or development of <br />alternative watering facilities. PSCM controls several senior water rights in the area which should <br />be more than sufficient to mitigate any impacts on beneficial water use resulting from potential <br />mining- related impacts to the hydrologic balance. <br />The primary postmining land use in the mine permit and adjacent areas will be undeveloped land <br />used primarily for wildlife habitat and limited livestock grazing. The proposed use involves <br />Midterm Review 2.05 -91 Revision 04/2013 <br />