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<br />South Portal. It is monitored primarily to keep it within a 10 foot zone between the <br />' bottom of the siphon for outfall 002 and the reclaimed Northwest Intake Portal. The <br />results of monitoring are included in the Mine Water section, Table M98-3. <br />' !n order to characterize the Rollins Sandstone iwo surface and two underground wells <br />were installed during June 1997. The surface wells were installed at the north decline <br />and the unit train loadout. The underground wells were installed in the North and <br />South Portals. Depth to water ranged from 56.5 feet below grade in the North Decline <br />' well to artesian in the North Portal well. Monitoring of these wells will continue in <br />accordance with permit requirements. Field parameters and annual quality information <br />a are presented on pages GE-1 through GE-4. <br />Rollins-1 is an underground well located in the North Portal and is under artesian <br />' conditions. Rollins-2 is located at the unit train loadout. Rollins-3 is loratari at the <br />north decline. Rollins-4 is an underground well located in the South Portal. <br />Mine Water <br />The annual mine inflows study for this Year was taken the end of November 1998. The <br />results of the study are given on data pages MA-19 through 20 and MB-13. A summary <br />' of past conductivity and flows from the monitoring locations are given on Tables M98-1 <br />through 5. inflow monitoring locations are shown on the 1998 Mine inflows Map. <br />' As usual, there are many differences in the monitoring results at the Roadside South <br />' Portal. These differences are primarily the result of changes in water routing, piping <br />and pumping patterns; and general difficulties involved with monitoring underground. <br />' Monitoring aY locations 24, 25, and 27 thru 31 was discontinued in 1996 due to sealing <br />of the south end of the No. 2 South Mains. Flow from these locations is piped from <br />'• these seals and is now monitored as new location 34. Flows from sealed panels at <br />locations 26, 15 and 6 dried up as well as location 16. The reduction in flow from these <br />saes may have corresponded to increased inflows in the 6th East Panel. This panel <br />' was completed and sealed in June of 1996 and inflows into the panel were not <br />accessible. The "total inflows" in the last column of Table M98-1 shows increasing <br />inflows for the Year. Conductivity at location 23 has remained higher than other <br />sources as shown in previous studies. This is typical of water setting in a sealed area <br />:.MR 9d Page 6 5-1-99 <br /> <br />