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' 1986 ANNUAL HYDROLOGIC REPORT ~ ~ ~ I) ~`®k~ <br />' OCTOBER 1985 THRU SEPTEFIBER 1986 ,}QN ~ 1987 <br />MINED LAND <br />ItJTRODUCTION RECLAMA7ipN DIVISIOR~ <br />The North Thompson Creek Mines were in temporary cessation at the beginning <br />' of this hydrologic year. In January 1986 a technical revision was applied <br />for requesting permission to reduce the hydrologic monitoring requirements. <br />TR-1 was approved t4arch 24, 1986 reducing part of the requirements and eliminating <br />others. <br />1 CMLRD was notified of Snowmass Coal Company's intent to go into permanent cessation <br />August 15, 1986. The environmentalist left in March due to eminent layoff <br />' and was not replaced. Environmental monitoring continued to be done by Western <br />Associated Coal Corp., Snowmass' managing partner, out of their Palisade office. <br />The confusion over permanent cessation, the change in monitoring personnel <br />and the change in monitoring schedule resulted in several gaps in monitoring. <br />No climatological information was taken this hydrologic year; therefore, there <br />is no information in Appendix I. <br />SURFACE WATER QUALITY <br />Appendix II contains the hydrologic information gathered for North Thompson <br />Creek, Middle Thompson Creek and the Roaring Fork River. tonitoring requirements <br />on the Roaring Fork River were eliminated and requirements on the creeks were <br />' reduced. <br />On the Roaring fork the upper and lower readings continued to exhibit little <br />change. Middle Thompson Creek also showed little change between the upper <br />' and lower readings. The change between upper and lower readings on the North <br />Thompson Creek is typical of past differences. The discharges from the #1, <br />#2, and #3 mines all contribute to the lower quality below the mine. <br />' The discharge from the #1 t4ine has been discontinued and discharge from the <br />#3 t4ine has been reduced. The reduction in mine discharge is expected to improve <br />the quality of the lower readings compared to the upper readings on tiorth Thompson <br />' Creek. The Abandoned Mines section of Colorado Mine Land Reclamation has continued <br />to service and upgrade treatment of the #2 Mine discharge during 1986. Whether <br />any improvement can be made in this discharge has yet to be shown. <br />' SURFACE WATER QUALITY <br />' Appendix III would normally have flow information from North and Middle Thompson <br />Creek. When time came to install the flumes, permanent cessation was being <br />planned and 3 of the 4 flumes had been partially washed out during high flow. <br />The decision was made to not repair the flumes or install the gages. The four <br />' flumes were removed in September 1986 as part of the reclamation work. <br />1 <br /> <br />1 <br />