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2.Gu.7 r~i~irolca~ Descriotion <br />COMMENT: <br />1. Peabody has re~~ised the potentiometric surface map of the 4!adge <br />Coal and Suoils and Wolf Creek Coal and Spoils (Exhibit 7-2A., <br />Seneca II Permit Renewal) in response to Comment No. 3 of the <br />original Adequacy Revieir.~. <br />The following problems exist with the revised potentiometric <br />Surface i4ap (Exhibit 7-2A): <br />A. The equipotential lines follow the topography near 17000E, <br />23COGS and 11500E, 245005 for no apparent reason. <br />?. The peientioinetric surface is above the topographic surface <br />near 13000E, 230005 and 9750E, 2450GS. if the spoils aquifer <br />is unconfined, water should flow perennially at these <br />locations. .:o indication of perennial flow in these areas <br />e>:ists. <br />C. The potentiometric map should indicate the areas where the <br />:polls are unsaturated, or estimaied ', by cashed lines) to <br />currently be unsaturated. <br />RESPCP;SE: <br />A. u E. <br />ChiLRD's concerns stemmed from the fact that they were unclear as to the <br />extents of spoiled and undisturbed areas on Exhibit 7-2A. Peabody's <br />assumptions concerning topographic control of the equipotential lines <br />was clarified ai the September 30th meeting in Denver. It was agreed <br />that no revisions to Exhibit 7-2A would be necessary. This has been <br />expanded upon in the discussion in Tab 7, Section VII 8.2.a. <br />C. <br />This ccmment has been addressed ir. Paragraphs ~ and 3 of Tab 7, Section <br />VII 3.2.a. <br />COMMENT: <br />• 2. The interaction betv:een the !golf Creek aquifer and the lJadge <br />aquifer, as indicated by the potentiometric surfaces, should <br />15 <br />