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iiiiiiiiiiiiiiiiiii <br />999 <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />1313 Sherman St., Room 215 ~r~ <br />Denver, Colorado 80203 I <br />Phone: (3031 866 3557 <br />FAX (303) 832-8106 <br />DEPARTMENT OF <br />February 11, 1997 NATURAL <br />RESOURCES <br />Roy Romer <br />Mr. Tom Petrosky Governor <br />Cottonwood Land Com an Tames S. LOChhead <br />p Y Executive Dnector <br />P. O. Box 662323 <br />Steamboat Springs Colorado 80488 Michael8 long <br />r Division Director <br />RE: 1995 Annual Hydrology Report, Hayden Gulch Loadout, Permit No. <br />C-92-081, Hayden Gulch Terminal, Inc. <br />Dear Mr. Petrosky: <br />The Division has completed its review of the 1995 Annual Hydrology <br />Report for the Hayden Gulch Loadout. The Division found that the <br />operator conducted all of the required surface water and ground <br />water monitoring. The 1995 monitoring showed that alluvial water <br />quality and alluvial well water elevations, recorded at sites <br />HGDALI and HGDAL3, were consistent with monitoring results dating <br />back to 1987. <br />Surface water quantity data, recorded at sites HGSD1 and HGSD3, <br />were in agreement with prior water flow data in Dry Creek. Surface <br />water quality was also consistent with previous years' data, except <br />for TDS and sulfate levels at site HGSD3. The TDS level reached an <br />all-time high of 5870 mg/1 on April 6, 1995, while the sulfate <br />concentration was at its highest level, 3750 mg/1, on that same <br />date. At the upstream site, HGSDl, TDS was 2800 mg/1 and sulfate <br />was 1660 mg/1 on that same date. There were no pond discharges near <br />that date as well. The Division agrees with the operator that <br />additional monitoring results will be needed before any conclusions <br />can be drawn. <br />The Division further finds that the 1995 water monitoring data <br />supports the predictions of the permit application's Probable <br />Hydrologic Consequences (PHC), except, possibly, for the TDS and <br />sulfate levels previously mentioned, which will need further study. <br />If you have any questions, please call me. <br />Sincerely, <br />D, <br />os ph ~. Dudash'~ <br />Environmental Protection Specialist <br />C:\WP51\HGLO\1995AHR <br />