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2-44 <br />~, 2.4.2.1 Probable Hydrologic Consequences <br />Impacts to both the surface and groundwater systems in the area of the <br />mine will be minimal. The design of surface water control systems is in <br />accordance with established regulations that ensure that these structures are <br />adequate to retain or safely pass the design events. The surface water flows are <br />either directed around the mine area or are passed through the sediment pond <br />and routed to the existing surface water system. No impact to surface water <br />flows is anticipated. <br />Groundwater encountered during mining will also have a minimal Impact <br />on the hydrologic regime of the area. There are three wells in a 2-mile radius, <br />•~ permit no. 32752, permit no. 254049 and permit no. 256862. Wells 32752 and <br />254049 are listed as abandoned and therefore have no yield. Well 256862 is <br />active and has a yield of 5 gpm but is used for irrigation only, not for potable <br />water. As can be seen on Figure 4.2-3, most of the area to the south and west of <br />the mine will not exhibit groundwater above the elevation of the coal seam. <br />The mine is situated near the locafion that the Cameo seam subcrops the <br />alluvial valley floor of East Salt Creek. A piezometer installed in drill hole 7-9-12 <br />at the Cameo seam, downdip of this subcrop, has been dry since it was installed. <br />Drill hole 7-15-3 was also dry. Drill holes in Section 22, east of the graben <br />indicate that this area may be saturated. <br />The East Salt Creek Alluvium is recognized as an alluvial valley floor. The <br />Division's 1987 Material Damage guidelines require any measured salinity values <br />over 1000 umho/cm be reported as 'suspect' values. Since baseline values for <br />~. <br />McClave Volume 1 08/06 <br />