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<br />STATE OF COLORADO <br />.~ <br />I~~ I~II~~I~~II~~ I~~ <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1713 Sherman 51., Room 215 <br />Denver, CO 80203 <br />Phone: (303) Hbb-1567 <br />FAx: (303) 832-8106 <br />December 13, 1993 <br />Mr. Jim Stover <br />Minrec, Inc. <br />2768 Compass Drive, Suite 101 <br />Grand Junction, CO 81506 <br />o~ `Oto <br />ti~4 <br />~c ~ "~ <br />• ~ r8 ]6 <br />Roy Romer <br />Governor <br />Michael B. Long <br />Division Drrector <br />RE: Review of 1992 sad 1993 Annual Hydrologic Reports; Red Canyon <br />Mines; File No. C-81-034 <br />Dear Mr. Stover; <br />The Division has reviewed the 1992 and 1993 Annual Hydrologic <br />Reports (AHRj for the Red Canyon Mine. The Division apologizes for <br />the time taken to review the 1992 AHR. All data and summaries have <br />been reviewed. The frequency of monitoring during 1992 and 1993 at <br />the Red Canyon Mine has been followed and the Division recognizes <br />the changes you have made to the AHR. <br />Surface Water <br />It is apparent in the flow readings taken on Ward Creek, that the <br />winter of 92/93 was indeed a record year for snowpack. Most of the <br />parameters analyzed appear to not have deviated from the monthly <br />averages. However, the Division noticed that the conductivity <br />readings increase significantly, during September of the last two <br />years, from the upstream sampling point to the downstream sampling <br />point. This increase could be construed as a mining related impact <br />to Ward Creek. Further indicators that the mine may be impacting <br />Ward Creek are the high conductivity readings in June and September <br />1993 for Springs land 3. The purpose of monitoring the springs <br />and Ward Creek is to determine if water from the flooded workings <br />is discharging to the glacial-alluvial aquifer of Ward Creek. <br />However, spring flow has remained relatively constant and on May <br />26, 1983, Spring 1 exhibited conductivity of 990 umhos/cm and then <br />decreased over time. This may be the case again. Flow on Ward <br />Creek does not exhibit any noticeable flow patterns. The Division <br />is not prepared to assess whether Ward Creek is being impacted from <br />the Red Canyon Mine. The Division would recommend that Minrec do <br />the following so this issues can be resolved: <br />^ Continue monitoring Spring 1 and Spring 3 to <br />observe whether the conductivity continues to <br />increase. <br />