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<br />_, <br />Wells PAW-1 and P'A~were established to monitor t`he exis~tin`g re use p,~le at the <br />New Elk Mine. Table 3 presents the range and mean for field parameters collected over <br />the 1985 water year. The main difference was an increase in conductivity from a mean of <br />336 at PAW-1 tom t PAW-2. Water in both wells is acalcium-bicarbonate type (Figure <br />8) with total ions measured at 5.21 and 11.47 me/1 at stations PAW-1 and PAW-2, <br />respectively. Metals analyzed for PAW-1 were near or below detection limits while <br />ma~~ese was elevated at station PAW-2. <br />During PAarch and April of 1985, 500 feet of the P4iddle Fork of the Purgatoire River <br />was diverted to the north to create additional room for the coal stockpile at the New Elk <br />,Preparation Plant. As the diversion was cut through an existing refuse disposal area, two li\e~ <br />i <br />/alluvial wells have been established to monitor water elevation and chemical parameters <br />as outlined in Stipulation No. 8 of Technical Revision No. 1 to the New Elk Permit. <br />r` (- V~~ Monitoring began in april of 1985 with the data presented in Tables 203 and 204 of <br />`~~` I ~ ~ Appendix 1 for stations PA\V-3 and PAW-4, respectively. The wells were cased with 18 <br />inch galvanized CMP and completed in the cobble and gravel fill of the channel. Total <br />depth of PAW-3 is approximately 20 feet from the top of the casing with the water <br />elevation at 17 feet below the top of the casing. Total depth of PAW-4 is approximately <br />15 feet from the top of the casing with water elevation at 12 feet below the top of the <br />casing. Static water level in both wells corresponds closely with static water level in the <br />Purgatoire River. Water quality monitoring shows water in these wells to be a calcium- <br />bicarbonate type water (Figure 8) and disturbed (refuse disposal) conditions as monitored <br />at PAW-1 and PAW-2 (Table 3). <br />1 <br />Wells PAW-5 and PAW-6 were established to monitor the Golden Eagle Mine. <br />Analyses of all water chemistry parameters at PAW-5 were similar to those of PAW-1 <br />indicating negligable effects of the New Elk Mine on the Purgatoire alluvium. Table 3 <br />presents the range and mean for field parameters measured. Again, the major difference <br />was observed in conductivity from a mean of 455 to 755 umhos at stations PA1V-5 and <br />PAW-6, respectively. Total ions measured also increased from 9.05 me/1 at PAW-5 to <br />16.61 me/1 at PA\V-6. Figure 8 shows that the water in PA\V-5 is acalcium-bicarbonate <br />type while that of PAW-b is more asodium-bicarbonate type. d.Aeta) cconcentrations in <br />both wells ,were near or below detection limits. Changes in water chemistry may be <br />attributed to the Golden Eagle 6.4ine Discharge and refuse disposal in Ciruela Canyon. <br />_22_ <br />