Laserfiche WebLink
and means for flow and water quality of the stations are presented in <br /> Tables 1-2, 1-3, and 1-12. All chemical parameters are similar to <br /> those of PRS-1 with a slight increase in conductivity, SAR, sodium and <br /> bicarbonate. These increases are not significant. <br /> The New Elk Mine Discharge (MDNE-1 ) is located on the Middle <br /> Fork of the Purgatoire River. All monthly data collected during 1988 <br /> and the previous four-year period for the station is presented in <br /> Tables 1-4 and 1-12 of Appendix 1 . Major differences can be noted in <br /> water quality to that of the Purgatoire. Conductivity is five times <br /> that of the river with a much warmer mean temperature . Mine discharge <br /> is a sodium-bicarbonate water rather than calcium bicarbonate as <br /> exhibited in the Purgatoire River. Metal concentrations were all low. <br /> There has been no significant change in water quality over the four <br /> years of monitoring. No change was expected as no mining activities <br /> have been conducted over this monitoring period. Sampling was also <br /> conducted at this station for NPDES discharge parameters which were <br /> observed to be within allowable concentrations over the year. NPDES <br /> reports which have been filed with the Colorado Department of Health <br /> are contained in Appendix 6. <br /> The Golden Eagle Mine Discharge (Station MDGE-1 ) is located <br /> in Ciruela Canyon approximately one-half mile from the Purgatoire River <br /> ( Figure 1 ) . During the fourth quarter of 1988 , Pond 005 was <br /> constructed to handle mine water discharge and provide additional <br /> settling time for suspended solids treatment . This pond became <br /> operational at the end of 1988 and discharges directly into the <br /> Purgatoire River. Both systems can now be utilized to handle discharge <br /> water . All monthly data for the station collected during 1988 is <br /> presented in Table 1-5 of Appendix 1 and summarized for the previous <br /> four-year period in Table 1-12. The water is a sodium-bicarbonate type <br /> with high ionization and low concentrations of metals . As with Station <br /> MDNE-1 , Station MDGE-1 was also sampled for NPDES parameters (reports <br /> contained in Appendix 6 ) . All parameters with exception of pH and TSS <br /> were within limitations over the year. Because of the increased inflow <br /> from the fault encountered in the second right development, <br /> -14- <br />