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• with some temporary reduction in down-gradient groundwater flows as a result <br />of filling of the underground mine workings as well as localized alterations <br />in groundwater flow patterns. The quantity of groundwater discharge which <br />will be effected is a relatively small percentage of the total volume within <br />the groundwater basin. <br />Control and Treatment of Surface and Groundwater Drainage. Surface water <br />drainage in and immediately adjacent to surface disturbance areas at both the <br />Southfield Mine and loadout will be controlled by diverting undisturbed <br />runoff around disturbance areas and collecting and routing disturbed area <br />runoff to sedimentation ponds to allow settlement of suspended solids and any <br />treatment which may be necessary. The following operational measures will <br />supplement these primary control and treatment measures. <br />• Limiting surface disturbance areas <br />• Proper design, construction, and grading of facilities areas, <br />roads, and drainage and sediment control structures <br />• Utilization of localized erosion control measures in any areas <br />• having high erosion potential <br />• Initiation of reclamation operations as soon as practical following <br />completion of mining <br />• Effective reclamation to minimize gradients, reestablish surface <br />drainage patterns, restore pre-mining runoff and infiltration <br />characteristics, and establish an effective and self-sustaining <br />vegetative cover. <br />• Post-reclamation land use management <br />The primary methods for controlling drainage and erosion from surface <br />disturbance areas include minimizing potential impacts by disturbing no more <br />area than is necessary for ongoing operations, capturing runoff as close to <br />its source as possible, routing undisturbed runoff around disturbance areas, <br />and effectively reclaiming disturbance areas as soon as possible following <br />completion of mining operations. <br />• <br />C:\7M\660\V OL.2IREC.PLN <br />10/24/949:09am WP51/cmc 2.05.6.35 Revised - 9/30/94 <br />