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Conclusion <br />This supplemental PHC analysis indicates that a revised PHC analysis is <br />neither warranted or necessary for the East Wadge Extension Area. This <br />conclusion is based on the following. The East Wadge Extension Area <br />will result in only a 1 percent increase in disturbance within the Bond <br />Creek drainage. The increased volume of spoil is considerably less as <br />the disturbance area takes into account that area necessary for <br />regrading the spoil to approximate original .contour. TDS and flow <br />values used in the 9/86 PHC analyses for both the Cow Camp and Bond <br />Creek spoil discharges yield potential Fish Creek TD5 increases in <br />considerable excess of any calculated (using measured values) to date. <br />Only 50 percent of the projected impact from Cow Camp discharges has <br />been measured and any impact from Bond Creek discharges is incalculable <br />at the present time. Finally, the small calculated TDS changes <br />calculated for Fish Creek will in no way preclude existing water uses or <br />result in any water use changes. <br />• <br /> <br />7-1-3 Revised. 05/16/88 <br />