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iii iiiiiiiiiiiiiiii 999 • • STATE OF COLORADO Roy Romer, Gove DEPARTMENT OF NATURAL RESOURCES MINED LAND RECLAMATION DIVISION DAVID C. SHELTON, Director May 12, 1987 Mr. David M. Stout Wyoming Fuel Company 72055 West Second Place Lakewood, Colorado 80215 Re: 1986 Annual Hydrologic Report - New Elk Mine (File No. C-81-012) and Golden Eagle Mine (File No. C-81-013) Dear Mr. Stout: The fornl of the above report is acceptable. There are, however, some Duestions about the content and some typographical errors that the Division would like corrected. Narrative: In the future, Table 2-Short List should contain the lead and se-lenium parameters which are now being included in the analyses run for selected New Elk and Golden Eagle monitoring stations. Page 14 contains the statement that all parameters of the Golden Eagle Mine discharge with the exception of pH were within limits for the year. WFC should indicate anything being done to keep pH of the discharge within the acceptable range in the future. Appendix is A check should be made of the July entry in Table 1-1; the flew lgure seems at odds with those for July in Tables 1-2 and 1-3 where maximum annual values were recorded in June. A check should be made of the flow figures entered in Table 1-2 for August thru December, The decline in flow recorded in just one mile between PRS-2 and PRS-3 during those months seems too large to believe. Can WFC explain such dramatic differences? Table 1-4 shows a footnote value of average pump flow of 106 gpm between July 1, 1986 and September 3, 1986 that does not agree with values derived from mine discharge volumes listed in Table 3 of Appendix 3. Why the difference? Table 1-4 and 1-5 lack listings of flow data but such information is apparently available from mine records. These values should be added to the tables in the future. 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. (303) 866-3567