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INTRODUCTION <br />• This manual describes the hydrologic monitoring plan for the Eagle Mine complex. Most <br />sampling is performed by RAG Empire Corporation personnel. All sample collection <br />personnel should be familiar with this manual, and should have the manual with them for <br />reference during sampling. <br />Hydrologic monitoring is carried out at the mine in order to meet requirements of the <br />NPDES permit and to meet requirements in the mining permit issued by the Colorado <br />Division of Minerals and Geology. <br />Depending on mining activity and monitoring data, the mine may follow either an active <br />mining monitoring plan (pages 1 through 15) or a temporary cessation (TC) monitoring <br />plan (Appendix D). The TC plan is a reduced version of the active mining plan. The <br />active mining monitoring plan is designed to identify changes in the hydrologic system. <br />The TC plan is designed to identify any change in the hydrologic system that could result <br />in a change in impact to the hydrologic balance. <br />n <br />u <br /> <br />TR-3 L <br />TR 01-32 1 June 21, 2001 <br />