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Adequacy Letter - TR 65 Page 8 <br />September 17, 1993 <br />4. The peak discharge for Phase IV on Table 12 in Exhibit 51 is <br />incorrect. From review of the SEDCAD output, 33.86 cfs is the <br />peak discharge, not 14.7 cfs. <br />5. Page 23 of Exhibit 51 states that a curve number of 88 would <br />be used on areas of the refuse pile that were not topsoiled. <br />From review of the non-topsoiled watershed, it appears that 88 <br />was not used. MCC should review these areas again. (See also <br />question 5 under the MB-2 System). <br />6. The table of contents in section 2.04 does not correspond to <br />the topics on the pages listed. It appears that the pages <br />shifted at "Other Factors that May Affect Mining Conditions", <br />page iii. MCC should correct the table of contents. <br />7. The table numbers in Exhibit 66, i.e. Table 42, 43, 44, and <br />45, do not correspond to table numbers given in volume 1 of <br />the permit. The numbers of these tables should agree. In <br />addition, updates to these tables required above should be <br />changed in the volume i tables as well. <br />8. Table 45 on page 2.05-37 does not correspond to elevations on <br />drawings or SEDCAD inputs. MCC should clarify the correct <br />elevations. <br />Please call if you have any questions. <br />r // _ <br />Christine E. ston <br />Reclamation S e ialist <br />007TR65 <br />c <br />