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<br />\J <br />EXHIBIT G <br />HYDROLOGY <br />There will be no changes to the surrounding hy~ <br />regime due to the proposed mining operation. There <br />no effect on the surface or groundwater systems due <br />operation. Exhibit C, Plate 2 illustrates water res <br />The project as currently envisioned would be classi. <br />non-consumptive user, therefore water consumptions <br />entirely on evarporative loss. The precipitation <br />and gross evaporation were given by the State Clime <br />Office at 18.0 and 30-35 inches, respectively. Thi <br />a net loss of 12 inches per year. <br />The proposed mining will require approximately 250 <br />per minute to wash the gravel and gold taken Erom t <br />Based on similar operations of this type, approximai <br />percent of the wash water can be expected to be los <br />leakage, evaporation, spray, and surface moisture <br />gravel. The ten percent loss amounts to approxim <br />gallons per minute. There will also be minor wal <br />from evaporation. For stockpiles, this loss is esti <br />be 5 percent of the net loss by the same amount of <br />surface water. For an assumed working pit area of <br />and an estimated stockpile surface of two acres, tt <br />annual evaporative loss is estimated to be .65 acre <br />Summary <br />Pond: <br />Iroloqic <br />will be <br />to this <br />~urces. <br />red as a <br />:e based <br />amounts <br />:olog i st <br />leaves <br />gallons <br />~e mine. <br />ely ten <br />due to <br />in the <br />stely 25 <br />er loss <br />nated to <br />exposed <br />one acre <br />e total <br />_eet. <br />5 of <br />Working pit: .OS of <br />Stockpile: .1 of <br />Total Annual Evaporative Loss: .b5 of <br />r <br />~__ <br />Assuming an average of 22 hours of operation per da seven <br />days per week, and seven months per year, the dai y water <br />required for the washing process will total about o e acre- <br />Eoot per day and about 210 acre-feet annually. <br />Reclamation for the proposed mining operation will <br />water for irrigation in addition to the wash water. <br />matley 30 acres each year will be under reclamatior <br />mining operation progresses, starting with the thi <br />Water required for irrigation is estimated to be < <br />mately 12 inches per year during the reclamation pro <br />additional water for irrigation will be required al <br />second reclamation year. The water required for <br />acres under reclamation each year will be 30 acre-fe <br />require <br />~pproxi- <br />as the <br />d year. <br />pproxi- <br />:ess. No <br />tec the <br />the 30 <br />~t. <br />20 <br />