Laserfiche WebLink
Manli 2004 Kerr Coal <'~'+#arN * 2003 Arnaal HRepat * Ct7Pemit Na G84006 ~ Pasr3 <br />3.0 MINE AREA GROUNDWATER (WATER-TABLE) <br />• Deep groundwater occurs under water-table conditions in two primary water-bearing zones in the <br />mine area; the Sudduth Coal Seam, and the undifferentiazed overlying overburden materials. The <br />Sudduth Coal Seam is monitored az well 79-61. This well is locazed just north of the historic Pit 1, <br />along Bush Draw, in the undisturbed coal seam The mine area overburden wells are designated 79-1, <br />79-2, and 79-3. These wells are locazed az the north and south ends of the historic 720 Pit, adjacent <br />to what was historically the east crest of the pit. Spoil Monitoring Well SP-Ol was completed in the <br />north end of the 720 Pit area in 2001 and spoil monitoring was initiated during 2002. See Map 1, <br />MireAraxMalirnrirgStatrwa, for general locazions. <br />Idistorical groundwater monitoring data for the coal seam and overburden wells have shown thaz the <br />characteristics of the water-table groundwater system, in terms of quality and quantity, have been <br />consistent. Given these conditions, monitoring of the mine area deep groundwater u no longer <br />required until the ]ast two years preceding final bond release. The spoil well was monitored on a <br />quarterly basis in October 2002 and April, July, and October 2003. <br />Table 1, 2003 Cirnarluuter C~aluy Statistic, includes a summary of the water quality data for well SP-Ol <br />for the 2003 wazer yEar. The individual analyses of samples collected are presented in Appendix B, <br />2003 Mine Spoil Water Quality Analyses. Figure 1, MineArez Grnarluater Lertlc, shows the relative <br />grormdwazer levels for the coal, overburden, and spoil over the past five guars {note thaz spoil <br />monitoring was only initiated doting the 2002 water ytar). The mean field and laboratory parameter <br />values for spoil monitoring to daze are presented in Table 2, Historic Mire Area Spat Water Sul' <br />Data. The recorded measruements ate contained on the field daza Iogs in Appendix A, 2003 Field <br />Data. <br />u <br />• <br />MWH * 1475 Pvr CnmeRd, Ste 109, * Stm»fua Sp~ir~, Cdomdo 80477 * (970J 879-6260 Reu 11/04 <br />m\ maws. aru,.wMdoxgw x:003 \~W) x¢d~Rgm <br />3/~9N1rP <br />