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III IIIIIIIIIIIII III STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department of Natural Resources 131 {Sherman SL, Ruom ? 15 liy~~ Denver, Colorario 80203 II Phone. (7031 8G6-3567 FA%: (303) 832-B10(r DEPARTMENT OF NATURAL RESOURCES July 29, 1994 Roy ROmer Governor Mr. Jim Stover %en saga:ar Minree, InC. Execwive Direcio~ 2768 Compass Drive, Suite 101 Mic hael B. LUn~; Grand Junction, CO 81506 Division Director R8: 8emi-Annual Bench Hydrologic Monitoring; Blue Ribbon Mine; Permit No. C-B1-047 Dear Mr. Stover; The Division has reviewed the results of hydrologic monitoring on the mine bench at the Blue Ribbon Mine. The results are for the first quarter of 1994. The Division has made the following observations regarding this report: * The results for the north underdrain are fairly consistent with previous years, except the flow has decreased from past years. * The flow in the south underdrain has also decreased over time. * Conductivity has increased in the south underdrain during the first part of 1994, which may be due to the decrease in flow for the same period. Conductivity has not reached .the historical high of 5300 umhos/cm. * The water level in P-1 continues to fluctuate seasonally. * The water level in P-3 had been consistent in the past. But for the last year there has been a decline in water level and was sampled dry during June 1994. P-3 is located below and to the south of the large slump that occurred in March 1993. The decline in water level may be due to the slump; however, this trend did not occur following the previous slump which occurred in 1989. * The water level in P-4 experience its highest level in June 1993. * The water level in P-5 continues its upward trend. * There is no data for P-6 as it was destroyed during the