Laserfiche WebLink
discharge influence the surface and ground water systems. Water quantity is not <br />affected by mining activities. <br />An increase in total dissolved solids (TDS) is noted on Lorencito Creek, with an average <br />of 300 mg/I TDS during the period 1996-1999 as compared to an average of 608 mg/I <br />TDS during the period 2001-2006. This increase coincides with the development of the <br />coal bed methane and the resulting water discharge associated with that activity. <br />Perennial CBM water discharge down Jeff Canyon and Puerticito Canyon appear to <br />cause the increase in TDS at LC-1 and in alluvial well MWLC-1 in lower Lorencito <br />Canyon. <br />Summary <br />The probable hydrologic consequences were predicted to be minimal or insignificant <br />during and after operations. The mine is now reclaimed and nearly all the disturbed <br />areas have been reseeded. Infrequent sediment pond discharge would be the only <br />predicted impact that could occur in the future. These potential discharges to the <br />stream system are monitored when they occur and to-date have not resulted in <br />downstream impacts. An evaluation regarding points of compliance for groundwater <br />was completed and no impact to the groundwater due to mining was predicted, <br />therefore there are no points of compliance at this mine site. <br />The Division has no further questions at this time. Thank you for conducting <br />monitoring in accordance with your approved plan. <br />Since ely, ~~ <br />,~~ <br />Kent Gorham <br />Environmental Protection Specialist II <br />