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' ~ -Z 9- Production figures for the pasture show that 1,000 air-dried pounds/acre can be expected from this area. Removal of 12.5 acres of land from production effectively reduces total production in the AvF 21.5. Total production from the entire farming operation is 244,800 lbs. This figure is based on the above mentioned production figure for the pasture plus the additional 347 acres, with a production figure of 400 lb./acre. The mining disturbance therefore effectively reduces the farms total production by So, Based on this analysis, the Division finds the removal of Z2,6 acres of the AVF from production to be negligible when compared to the farm's total production. xowever, any additional disturbance to the AVF will not be allowed. The proposed operation will interruptagriculture, but the Division finds that the disturbed area is of such small acreage as to be of negligible impact on the farm's production. 2, Rule 2.06.8 (5) (a) (i) (A) (I) The present mining activities crere approved under previous mine plans. Information contained in the permit application and site inspections by Division personnel indicate that the present mining activities may presently be impacting and will impact in the future, the quantity and quality of surface and ground water systems that supply alluvial valley floors along Stollsteimer Creek. (AZso~see Section titled "Assessment of Probable Hydrologic Consequences of Mining and Cumulative Hydrologic Impacts".) The applicant has provided to the Division an estimate of the amount and rate of water which will be depleted From Stollsteimer Creek following closure of the mine. The total amount of water which will be depleted from Stollsteimer Creek to recharge the spoils aquifer, which will develop in the existing pit, is approximately 42 million gallons. The rate of recharge will be the sum of infiltration - deep percolation rate (1 gpm), and the rate of inflow from the pit walls (SO gpm). The rate of inflow from the pit walls will decrease logarithmically from 10 to 0 gpm with time. The calculated time for complete recharge of the spoil aquifer will be between 20 and 30 years. Therefore, there will be a continuous depletion of water tributary to the AvF's for a similar period. This depletion of water tributary to Stollsteimer Creek will be negligible. After the spoil aquifar has been fully recharged, a mound of ground water will begin to develop in the spoils. Eventually the spoil aquifer will begin to discharge water of lower quality to the bedrock aquifers, stream alluvium and ultimately to Stollsteimer Creek.