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CONCLUSIONS <br />Recent and Projected Hvdrologic Impacts <br />No significant impacts from mining on the hydrologic regime were <br />observed in 1991. A temporary impact on pond and spring 13-5 may <br />have occurred but this temporary drying of the pond could also have <br />been the result of natural fluctuations. Resaturation of the pond <br />in the fall indicates that the impact, if any, was temporary. <br />Springs 5-30, SP13-5, and SP85, and Pond P13-7 are located close to <br />areas that will be under mined within the next three years. Based <br />on previous monitoring, however, these features are not expected to <br />• be impacted. Spring S31 is outside the angle of draw of projected <br />mining although the recharge area for this spring could be within <br />the projected angle of draw of mining. This spring is not likely <br />to be impacted because of high overburden cover in the drainage <br />above the spring. Field inspection, photo analysis and comparisons <br />with other colluvial springs indicates that the recharge area for <br />this spring is the colluvial and slope wash deposits located <br />upslope of the spring where several drainages converge. Water <br />quality and flow characteristics of this spring also indicate that <br />the shallow colluvial deposits in the valley is the source of the <br />spring. <br />• <br />20 <br />