Laserfiche WebLink
<br />• Re;noose <br />The Animas River serves as the potential recharge basis for strata below <br />that water table. The strata to be mined lies up to 800' above this <br />recharge point. Thus, the charging of the "perched" water-bearing strata <br />must come from snow-melt and precipitation events in the upland areas. <br />See text changes in Section 2.04.5(1). <br />in <br />2.04.7 There is a tremendous amount of information in Appendix 4-2 and 4-3 that <br />should be tabulated and analyzed as to quantity and quality of the water. <br />A piezometric map of the azea needs to be generated and the location of <br />each of the wells and drill holes should be indicated as well. The data <br />from thee logs and from the annual hydrologic reports from 1985 to 1992 <br />should be analyzed, tabulated, and graphed to show trends in quantity and <br />quality and explain why there are variances in the data such as TDS <br />quantities in spring 4. <br />Anew Probable Hydrologic Consequence impact assessment needs to be <br />accomplished, especially since there is acid mine drainage from the nearby <br />Peerless Coal Mine. <br />• Anew and complete ground water monitoring plan needs to be included <br />in the permit. Currently only one colluvial well is being monitored at this <br />time (well 17B). More wells need to be drilled/monitored, especially, if <br />Oakridge wants to prove there is enough water to fill and maintain a 20 <br />acre feet pond. Information indicating how the monitoring wells were <br />completed and developed should be included. <br />Response <br />Data from Appendix 4-2 and 4-3 will be tabulated and submitted in the <br />supplemental response to this submittal. A piezometric map is not <br />appropriate due to the "perched" nature of the water encountered. Trends <br />in quality will be presented in graph form to be submitted as set forth <br />above. The text has been modified to include an additional ground water <br />. A revised Probable <br />Hydrologic Consequence impact has been inserted in the text. <br />Oakridge has revised its bonding not to include the use of a pond or lake. <br />Therefore, availability of water is not important for Lake use. <br />• u soon <br />2.04.7(2) Paragraph one should indicate the ]0-year 7-day low flow rates of the <br />Animas River and included in Figure 4-3. Please indicate the date the <br />AHR is to be submitted to the Division. <br />-4- <br />DEC ; ;, 1992 <br />