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~ III Iillllllllllllll <br />STATE OF COLOlZADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />117 3 Sherman 51., Room 215 <br />Denver, CO 80?03 <br />Phone: (303) 866-3567 <br />FA x:13031 1432-8106 <br />January 6, 1994 <br />Mr. Karl Koehler <br />Cyprus Orchard Valley Coal Corp. <br />P. 0. Box 1299 <br />Paonia, CO 81428 <br />RE: 1992 Annual Hydrology Report, Mine Inflow Report, Subsidence Report, <br />Orchard Valley Mine, C-81-038 <br />Dear Mr. Koehler: <br />of cow <br />Neb <br />~~ ~f <br />~ rB ]6 <br />koy ROmer <br />Governor <br />M¢hael B Long <br />Division Dneclor <br />The Division has completed review of responses submitted December 17, 1993 by <br />COVCC to the Division's adequacy comments of November 17, 1993. Also reviewed <br />was the data and cover letter submitted in response to NOV C-93-147 dated <br />November 24, 1993. Please respond as appropriate within 30 days or receipt of <br />this letter. <br />1992 Annual Hydrology Report <br />Monitoring Frequency <br />As outlined in a memo from Kent Gorham to Steve Shuey dated November 3, 1993, <br />many sites were deficient with regard to monitoring frequency in 1992. <br />NOV C-93-147 was issued for failure to adhere to the approved hydrologic <br />monitoring program. Information submitted by COUCC in response to the NOV <br />indicated data had inadvertantly been omitted from the report. The following <br />is a listing of data which was collected but omitted from the report: <br />Surface Water Sites <br />SWl - Chloride, Sulfate submitted for 6/25/92, 10/16/92 <br />SW2 - Chloride, Sulfate submitted for 6125/92, 10/16/92 <br />SW5 - Chloride, Sulfate submitted for 6/1/92 <br />SW10 - Chloride, Sulfate submitted for 6/25/92, 10/16/92 <br />SW12 - Chloride, Sulfate submitted for 6/26/92 <br />Wells <br />SM1, SM5, SM6, SM7, SM10, SM11 - Chloride, Sulfate submitted for 10/28/92 <br />SM2 - Chloride, Sulfate submitted for 1/31!92, 10/28/92 <br />Full suite submitted for 12/31/92 <br />SM3 - Chloride, Sulfate submitted for 10/28/92 <br />SM9 - Chloride, Sulfate submitted for 10/28/92 <br />2 full suite samples submitted for 1/31/92, 12/31/92 <br />B-7 - Chloride, Sulfate submitted for 10/16/92 <br />2 full suites submitted for 1/31/92, 12/31/92 <br /> <br />