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<br /> <br />TAT E iii iiiiiiiiniii iii <br />999 <br />OF C:OLOr~RDO <br />DIVISION OF MINERALS AND GEOLOGY <br />Deparrmem of Natural Resources <br />1313 Sherman SI., Room 215 <br />Denver, ~oOrddG 80'_03 DIVISION O F <br />phone c3o31 she-3se~ MINERAL S <br />FAY. 130b s3?-8106 $i <br /> GEOLOGY <br />January 31, 2001 MENINGM ATF EOTY <br />RAG Empire Corporation Bill Owens <br /> Governor <br />Richazd Mills <br />Mr <br />. Greg E. Walche. <br />P.O. Box 68 E.ecwwe Director <br />Craig, CO 81625 Michael 0. Long <br /> Division Director <br />Re: 1998 and 1999 Annual Hydrology Reports, and 1999 Annual Reclamation Report <br />Eagle 5 and 9 Mines, Permit C-81-044 <br />Dear Mr. Mills: <br />The Division has completed its review of the above-referenced reports. The results of the <br />review aze shown on the attached review checklist. The 1999 Annual Hydrology Report was <br />well-prepazed and thorough. The Division has the following comments regazding the reports. <br />1. Submittal of 1998 Annual Hydrology Report. The Division does not have copies <br />of the 1998 annual hydrology report. Please submit two copies. <br />2. Submittal of 1999 Pond Inspection Reports. The Division does not have copies of the <br />1999 pond inspection reports. Please submit copies. <br />3. 1999 Annual Hydrology Report, underground mine discharge volume (Figure 17) and <br />discharge rate (Appendix 1). The reported discharge volumes seem small for the reported <br />discharge rates. For example, the 7 North Angle's 325-gpm rate reported for 12/99 would <br />take only 42 minutes to produce the 13,604 gallons reported for that month. Are these <br />figures accurate? <br />4. 1999 Annual Hydrology Report, Table 8, spurious pH value. The field pH maximum is <br />reported as 910, an obvious unreliable figure. Please correct it if it i:> a typographical error. If <br />910 was the actual measurement (indicating a measurement error), then please exclude <br />unreliable data of this type from the summary sheets in the annual reports. <br />Please do not hesitate to cal] me if you have any questions. <br />Sincerely, <br />% ~ ~~~~ <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc: Dan Hernandez, CDMG <br />