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<br /> <br /> <br />Recovery <br />Recovery was simulated for 20 years past the end of pumpage (from , <br />years 2005 through 2024). Drawdown of up to 12.5 feet remains in the <br />unconfined outcrop area uP9radient of the Seneca IIW well at the end of <br />simulation year 35, in the year 2024 (Figures l0a and lOb). This is due <br />primarily to the depleted unconfined storage, the small amount of recharge <br />available to this area, and to the Trout Creek sandstone's low to moderate <br />transmissivity. In the year 2024, less than one foot of drawdown may <br />still occur up to five miles away from the Seneca IIW well. In the area <br />of the Yoast well, recovery is nearly complete with drawdowns of slightly <br />greater than 1 foot extending within a mile of the well. Based on the <br />assumptions used in the model, it is estimated that full recovery will be <br />very slow near the IIW well. <br />Summary • <br />A very conservative approach was used to model the effects of pumpage <br /> <br />on surface flows by underestimating recharge and overestimating pumping <br />rates and the amount of hydraulic communication between the Trout Creek <br />sandstone outcrop areas and the intersecting surface-water features. The <br />modeling results show that the largest impact to streamflows occurs at the <br />end of mining in simulation year 15 (2004) when both wells have been <br />pumping. The stream depletions are due primarily to pumpage from the <br />Yoast well and effects are felt only in streams close to the Yoast mining <br />operation. Recovery will almost be complete at the Yoast well in 2024; <br />however, drawdowns of up to 12.5 feet occur in the area upgradient of the <br />IIW well. It is anticipated that recovery will be slower in this region. <br />8333003.004 8 • <br />GeoTrans, inc. <br />