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4.0 RECLAMATION CONDITIONS <br />The reclamation plan allows for groundwater to fill the lakes. Groundwater <br />exposed to the atmosphere by the lake surface will evaporate. Pan evaporation <br />in the area of the Stroh Pit is approximately 39.5 inches /year (Farnsworth and <br />Peck 1982). The evaporative loss in the 28.4 acre west lake equates to <br />approximately 93.5 acre - ft/year or 58 GPM. The evaporative loss in the 10.5 <br />acre east lake would be 34.6 acre - ft/year or 20 GPM. The USGS spreadsheet <br />calculator was used to calculate the local drawdown due to evaporative loss in <br />the lakes. The output is given in Appendix C. The drawdown due to the west pit <br />lake is predicted to be 0.3ft at the south property boundary. The drawdown due <br />to the east pit lake is predicted to be 0.13ft at the south property boundary. <br />Stroh Pit <br />Groundwater Analysis Report <br />5of8 <br />