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• 2.5 1992 Hydrological Data <br />Hydro-Engineering Int.'s collation of the 1992 hydrological data for Trapper Mine is submitted as Section <br />2.5, addressing: <br />a. Groundwater <br />(1) Static water level graphs <br />(2) Salinity graphs <br />(3) Piezometric surface maps for the <br />major aquifers <br />(4) Water quality <br />b. Surface water <br />Sections 2.0-3.5 <br />Appendic A <br />Appendhc B <br />Maps 2.1-2.3 <br />Appendix B Table B-1 <br />(pages B40-B126) <br />Sections 4.0-5.3 <br />Appendtx C Table Cl <br />Appendix C Figures Cl-(:4 <br />Appendix C Figures CS-C;10 <br />Appendix C Figures Cll-C17 <br />(1) Water quality figures and tables <br />(2) Flow charts <br />(3) Flow vs TSS vs time <br />(4) Conductivity vs flow vs time <br />\J <br />Included with [he 1992 Hydrology Report is a laminated index sheet (blue) to keep the basic well data and <br />aquifer information available to the reader. This index is to be used as the reference: and also a bookmark" <br />as the section is reviewed. <br />2.6 Trends <br />Refer to Hydro-Engineering's Section 2.11 (page 2-2), Sections 6.1 Groundwater (page 6-1) and Section 6.2 <br />Surface Water (page 6-4). Generalty both static piezometric ground water levels and surface nows are <br />reduced because of drier climatic conditions. Trapper has had little if any effect on the local hydrologic <br />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 land <br />areas. The survey located no new or existing spoil springs that meet the 5 gpm sampling criteria for the third <br />consecutive year. Only one spoil spring (Cottonwood) in Coyote drainage has exceeded that criteria (1988) <br />but lower-than-normal precipitation totals since has reduced the flow to <1 gpm. <br /> <br />• <br />