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2003 Annual Hydrologic Report Page 5 <br />• A former mine dewatering hole (N-1) located at the North Decline area of the mine is <br />used to monitor the water level in the abandoned portions of the Roadside South Portal. <br />Since discharge point 016 was put into service, the water level in N-1 is virtually <br />constant and it is expected to stay at an elevation of about 4758. The results of <br />monitoring N-1 are presented in Table M03-2. <br />In order to characterize the Rollins Sandstone two 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 South <br />Portals. Depth to water ranged from 56.5 feet below grade in the North Decline well to <br />artesian in the North Portal well. Monitoring of these wells will continue in accordance <br />with permit requirements. Rollins-1 and 4 located underground in the North and South <br />Portals respectively have been sealed. Depth to water data is presented on data page <br />GE-1, Quality information is presented on pages GE-10 and GE-11. <br />The Rollins Sandstone wells are numbered Rollins 1, 2, 3 & 4 on data page GE-1. <br />Rollins-1 is an underground well located in the North Portal and was under artesian <br />conditions. It was sealed as of December 1999. Rollins-2 is located at the unit train <br />• loadout. Rollins-3 is located at the north decline. Rollins-4 is an underground well <br />located in the South Portal. It was sealed as of April 2000. <br />Mine Water <br />There was no annual mine inflow study performed this Year since one was performed <br />during December 1999 and reported in the 1999 report. Since the North and South <br />Portals have been sealed, there will not be any additional mine inflow studies. <br />Consumptive Use <br />Consumptive use during the year was for dust suppression and hydro-seeding. No <br />records of this minor amount of consumptive use are available. <br />Impacts <br />The average total dissolved solids for the mine discharges calculated with total flow for <br />the Year yields the tons of TDS discharged for the year. Outfall 016 discharged a total <br />of 778.4 tons of TDS to the river during the Year. <br />