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2013 AHR Page 6 <br />the water levels in the nested piezometers is shown on diagrams G13 -7, 8, 9 and 10. <br />The past results of water level measurements at the unit train loadout are listed on Data page <br />GB -2. Monitoring of these piezometers was discontinued with the approval of SL -7 in April <br />2011 and the UTL -01, UTL -02, UTL -03 and UTL -04 piezometers were sealed and reclaimed on <br />May 17, 2011. The Well Abandonment Reports were included in DRMS's quarterly report dated <br />July 7, 2011. No monitoring was performed during the Year. <br />A former mine dewatering hole (N -1) located at the North Decline area of the mine is used to <br />monitor the water level in the abandoned portions of the Roadside South Portal. Since <br />discharge point 016 was put into service, the water level in N -1 is virtually constant and it is <br />expected to stay at an elevation of about 4758. The results of monitoring N -1 are presented in <br />Table M13 -2. <br />In order to characterize the Rollins Sandstone two surface and two underground wells were <br />installed during June 1997. The surface wells, Rollins -2 and Rollins -3, were installed at the unit <br />train loadout and the north decline respectively. The underground wells, Rollins -1 and Rollins -4, <br />were installed in the North and South Portals respectively. Depth to water ranged from 56.5 feet <br />below grade in the North Decline well to artesian in the North Portal well. Monitoring of these <br />wells was performed in accordance with permit requirements. Prior depth to water data is <br />presented on data page GE -1 -1. Rollins -1 was sealed in December 1999 and Rollin -4 was <br />sealed in April 2000. Rollins -2 and 3, with the approval of SL -7, were sealed in May 2011. The <br />Well Abandonment Reports were included in DRMS's quarterly report dated July 7, 2011. No <br />monitoring was performed during the Year. <br />Mine Water <br />There was no annual mine inflow study performed this Year since one was performed during <br />December 1999 and reported in the 1999 report. Since the North and South Portals have been <br />sealed, there will not be any additional mine inflow studies. However, the following narrative is <br />provided to summarize the mine inflow studies performed through 1999. Snowcap Coal <br />Company diligently performed mine inflow studies at the south portal from 1986 through 1999. <br />As the mine was being developed to the south, thirty -six (36) mine inflow points were identified. <br />The measured mine inflow varied over the period of record from a low of around 100 gallons per <br />minute to over 350 gallons per minute. During the final two years of the mine inflow studies <br />(1998 and 1999) mine inflows were measured at 326 and 302 gallons per minute respectively. <br />Most of the water inflow comes from the south end of the mine as shown on Figure 1. <br />The majority of the mine inflow originated from the following three locations when the mine <br />portals were sealed in April of 2000. <br />Monitoring Location <br />1998 Flow <br />1999 Flow <br />Average <br />03 <br />50.4 <br />38.5 <br />144.4 <br />