Laserfiche WebLink
5 ~a b~' I ~ a~~ ^., ~ ~'kz ~~:e~~ ~ -~-~"~ v, ~ .r, ..~ dt .~ .+,~ re-Fle~ <br />a w ~'` u ~ ~'~~ i ~~~"'~ Anne v .,2„~~ ~ ~ c,~.~~d~ <br />y Z ~ <br />'t e~~~~ RAG, Empire Corporation 1999 AHR <br />~ Tables 7 through 12. Plots of field conductivity for these Middle Sandstone Wells are <br />presented in Figure 14. The conductivity measurements recorded at well 81-01 <br />continue to stabilize at values near those typically observed for the other Middle <br />Sandstone wells (TR~I AND TR-7A). Wells TR-7A and TR~4 indicate slight reduction <br />in concentrations of major ions over time. Historically, all three wells show reduction in <br />concentrations of iron which shows considerable variation in concentrations. The <br />general reduction in iron concentrations may be the result of better purging of well <br />bore volumes prior to sampling plus a switch to dissolved concentration analysis. <br />The 1999 field parameter data for the two Twentymile Sandstone wells (No. 9 Mine <br />Well and Well 259), do not suggest significant impact or trend. Water quality data for <br />• the Twentymile Sandstone wells are summarized in Tables 13 through 16. Plots of <br />field conductivity over time are presented in Figure 15. Measurements during 1999 <br />appeared normal. <br />In summary, the water quality of all three sandstone aquifers does not indicate any <br />significant trends or adverse impacts related to mining at Mines 5 and 6. <br />COAL <br />FLOWS <br />Plots of the measured discharges for the two #5 Mine discharge points are presented <br />. in Figure 16. Figure 17 is a monthly tabulation of meter readings for 1999. While in <br />Page 6 <br />