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• 2002 Annual Hydrologic Report Page 6 The Rollins Sandstone wells are numbered Rollins 1, 2, 3 & 4 on data page GE-1. Rollins-1 is an underground well located in the North Portal and was under artesian conditions. It was sealed as of December 1999. Rollins-2 is located at the unit train loadout. Rollins-3 is located at the north decline. Rollins-4 is an underground well located in the South Portal. It was sealed as of April 2000. Mine Water There was no annual mine inflow study performed this Year since one was performed during December 1999 and reported in the 1999 report. Since the North and South Portals have been sealed, there will not be any additional mine inflow studies. Consumptive Use Consumptive use during the year was for dust suppression and hydro-seeding. No records of this minor amount of consumptive use are available. • Impacts The average total dissolved solids for the mine discharges calculated with total flow for the Year yields the tons of TDS discharged for the year. Outfall 001 discharged 36.7 tons; Outfall 002 discharged 201.3 tons for 002 and ouffall 016 discharged 267.7 tons. Therefore a total of 505.7 tons of TDS were discharged to the river during the Year. The 2002 TDS discharge represents 0.05% of the 1.0 million tons calculated to be carried by the River. Discharge from the Roadside North Portal, outtall 004, has ceased. At the Roadside South Portal, water is expected to perpetually discharge. Roadside South Portals ouffalls 001 and 002 were replaced by outfall 016 during the 2002 water year. There was no detectable effect of mining on flows in Cottonwood and Rapid Creeks. Mining ceased at the Roadside Portals on December 2, 1999. No further mining from either portal is anticipated in the foreseeable future. Consumptive use will be insignificant in the future because mining and washing of coal has ceased. Consumptive use will be for dust control during reclamation operations. I•