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III IIIIIIIIIIIII III 999 C c~RUs "~ Empire Corporation February 21, 1993 Janet H. Binns Reclamation Specialist Division of Minerals and Geology 1313 Sherman St., Room 215 Denver, CO 80203 [s--~--a:r..i MAR 1 1994 L'i~~ieicn cf Aginerals 8 Geclogv Re: Cyprus Empire Corporation (CEC) Permit C-81-044 Renewal Adequacy Response Dear Ms. Binns: This Adequacy response will follow the same outline and sequence as the Division's review dated September 10, 1993. I. Outstanding Midterm Concerns A. CEC is currently, and will continue in the future to report hydroxide values ( though most will be zero) for all wells. CEC does not, however, feel that it is necessary or appropriate to include our previous explanation for not reporting zero values in the permit at this time. CEC will address this in a forthcoming revision request specific to the Hydrologic Monitoring Plan. II. 1991 Annual Hydrology Review A. The date line along the bottom of Figure 10 (AHR - 1991) delineates the beginning of each calendar year, and four (quarterly) water level elevations are recorded annually (between delineations). At the beginning of 1991 the linear regression line indicates an overall water level decrease to an elevation of approximately 6245 feet. However, by the end of 1991 (or the beginning of 1992) the linear regression line indicates the overall water level decrease to be nearer to 6240. The overall decline in Well 83-03 of 15 feet through 1991, as reported in the AHR - 1991, is correct. B. As you are aware from our January 21st meeting at your office, our Trout Creek Sandstone well monitoring program will soon be undergoing change with the approved elimination of the Okie Plaza Well. As agreed in that January 21st meeting, as part of the continuing Trout Creek Sandstone monitoring program CEC will henceforth cease pumping the No. 5 Mine Wells for a period of 24 hours prior to taking quarterly water level measurements. This P.0. Box 68 Craig, Colorado 81626 303-824-8246