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RULE 2 PERMITS <br />,~~ _~,_ __.- - _ .... _~. ,.µ ~ , . ~.m ,,._ v_. <br />• Pit Inflow and Pit Surface A'ater Recharge Impacts <br />The minor springs located on the hill slopes adjacent to the proposed South Taylor Pit (Map l0A), which <br />flow four months of the yeaz or less, are the springs likely to experience diminished flow. Springs 3-93- <br />20-212 and 3-93-17-142, -143, -144, and -432 (South Taylor) and 3-93-20-213, -214, and -215 (West <br />Fork Good Spring Creek) are located within the pit boundary and will be eliminated by the pit. Taylor <br />Creek would potentially lose about 20 gpm of its peak flow (0.04 cfs), which is about 2% of its 1.9 cfs <br />peak flow. The West Fork Good Spring Creek would potentially lose about 5 gpm (0.01 cfs) of its peak <br />flow which is 0.5% of its 2.1 cfs peak flow. Since these springs only flow seasonally, neither creek <br />would lose any base flow by the elimination of these springs. <br />The South Taylor pit is likely to be within the watersheds for these springs: GSCS-1, WFS-1, WFS-2, <br />WFS-4, WFS-5 and SA, and WFS-7 and 7A, and 3-93-29-234. These springs collectively contribute <br />about 20 gpm to the base flow and about 130 gpm to the peak flow of Good Spring Creek, the majority of <br />this flow originating in the WFS-2 complex. This is equivalent to 0.04 cfs contribution to the base flow <br />and about 0.3 cfs contributed to the peak flow. The WFS-2 spring complex is located in the bottom of the <br />drainage and therefore is likely to obtain most of its water from areas outside of the South Taylor pit azea. <br />If all the contributions from these springs were terminated by South Taylor mining, the West Fork Good <br />Spring Creek would lose 0.04 cfs of its base flow, and about 0.3 cfs of its peak flow. This amounts to a <br />calculated loss of about 5% of the base flow of 0.85 cfs and about 3% of the peak flow of 11 cfs (as <br />measured at NUGSC). However, since much of the rechazge is from undisturbed aeeas outside of the <br />South Taylor pit, the probable reduction is likely to be less than half of this amount and not expected to be <br />measurable or statistically significant. Once the mining has been completed and the pit has been <br />• saturated, the contributions to surface water from springs originating from infiltration into the South <br />Taylor pit would return to normal. <br />• <br />South Taylor/Lower Wilson -Rule 2, Page 113 Revision Date: 3/3 0/07 <br />Revision No.: PR-02 <br />