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• An additional NPDES point, Grouse Gulch (015), was added during the year. No new pit dewatering <br />wells were constructed in 1993. <br />2.5 1993 Hydrological Data <br />Hydro-Engineering Inc.'s collation of the 1993 hydrological data for Trapper Mine is submitted as Section <br />2.5, addressing: <br />a. Groundwater Sections 2.0-3.5 <br />(1) Static water level graphs Appendix A <br />(2) Salinity graphs Appendix B <br />(3) Piezometric surface maps for the major aquifers Maps 2.1-2.3 <br />(4) Water quality Appendix B <br />b. Surface water Sections 4.0-5.3 <br />(1) Water quality figures and tables Appendix C <br />(2) Flow charts Appendix C <br />(3) 'Flow vs TSS vs time Appendix C <br />(4) Conductivity vs flow vs time Appendix C <br />Included with the 1993 Hydrology Report is an index sheet (blue) to keep the basic well data and aquifer <br />information available to the reader. This index is to be used as the reference and also a "bookmark" as the <br />section is reviewed. <br />• 2.6 Trends <br />Hydro-Engineering's Section 6.0 discussed the observed impacts on the hydrologic systems of the Trapper <br />Mine. In general, ground water levels and surface water flows were up over those observed in 1992. <br />Increased precipitation levels (two inches more than 1992) was the primary contributor. Trapper has had <br />little if any effect on the local hydrologic regime. <br />2.7 Spoil Spring Sampling (1992) <br />Trapper conducted the annual spoil spring inventory, required by Section 4.8.5.2a, across our mined <br />areas. No new spoil springs were located and none of the existing spoil springs exceeded the five gallon <br />per minute flow criteria. <br />[DMG\93REPT21 <br />• <br />