Laserfiche WebLink
~~ <br />STATE OF COLORADO <br />Roy Romer, Governor <br />DEPARTMENT OF NATURAL RESOURCES <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Director <br />DATE: July 18, 1989 <br />T0: Dan T. Mathews <br />FROM: Randy P. Price ~• <br />RE: Chimney Rock Mine Annual Hydrologic Report for 1988 <br />I have reviewed the 1988 Annual Hydrologic Report (AHR) for the Chimney Rock <br />Mine. The AHR contains monitoring data for years 1485 thru 1988. The report <br />was well written, contained valid interpretations of monitoring data and <br />presented data in both graphical and tabulated form. The report did not <br />indicate that there were any adverse environmental impacts caused by mining. <br />The report contained a brief description of the hydrologic regime with a list <br />of sampling locations. Each location had a description of the formation or <br />stream segment that was monitored and the type of impacts that might be <br />expected to occur as a result of mining. Summaries of revisions that have <br />been made to the permit that effected water monitoring were included in the <br />report. <br />The Chimney Rock mine is currently on a quarterly monitoring schedule for all <br />sampling sites. Three (3) sites are located on Stollsteimer Creek, the rest <br />are alluvial or deep ground water wells in the Fruitland Formation. All wells <br />are bailed 3 casing volumes; this evacuates stale water in the casing that may <br />not represent the water quality in the aquifer. Quarterly pond inspection <br />reports were included in the report. It was mentioned in the report that in <br />1988 there were 2 NPDES discharges from Pond 005 but results were not given. <br />Monitoring results indicate that there are no detectable adverse environmental <br />impacts due to mining. As expected a spoils aquifer is establishing in the <br />reclaimed area. Water levels and conductivity in spoils monitoring well W-16 <br />show increases. However, spring and seep monitoring of the reclaimed area did <br />not show any seeps. The water in spoils monitoring well W-16 was fairly low <br />in TDS as compared to other spoils aquifers in Colorado. Generally spoils <br />aquifers run 3500 mg/l, but the well W-16 shows only levels up to 1050 mg/1. <br />/bdc <br />7936E <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203.2273 Tel. (303) 866-3567 <br />