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s <br />Jeff Deckler - 2 - November 14, 1986 <br />application. Area 23 was calculated to have a peak discharge of 47 CFS <br />in the permit application; I calculated peak discharge for this area to <br />be 60 CFS. Area 9 in the application had a peak discharge of 22 CFS. <br />The value that I calculated was 69 CFS for Area 9. The discrepancy <br />between our two calculations may be attributed to different peak <br />discharge charts used. A chart appropriate for eastern Colorado must <br />be used to calculate peak discharge. The New Elk Mine must support <br />their calculations with appropriate charts or the peak discharges <br />should be recalculated using charts fora Type IIA storm for eastern <br />Colorado. If needed, peak discharges for all areas should be <br />recalculated. <br />/iml <br />5334E <br />