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<br /> <br /> <br />Surface Water Summary <br />Loner than average snoumelt runoff the past five years (see Table 2, Appendix A) have <br />generally resulted in low stream flows and NPDES discharges. Only minor changes in water <br />types were noted at sites monitored during 1991. TDS values at many monitoring sites have <br />increased, in part due to the decreased snoumelt runoff. An increase in mining areas have <br />also contributed to increases in TDS values at the NPDES 004 and 008 sites. TDS values at <br />the NPDES 003 site have decreased slightly this year. TDS values at the NPDES 002 site <br />remain relatively constant since this area has been completely mined out. <br />References <br />American Public Nealth Association (Ed.). 1985. "Standard Methods for the Examination of <br />Water and Nastewater", 16th Edition, Washington, D.C. <br />erakensi eh and others. 1979. "Field Manual for Research in Agricultural Hydrology". <br />Buchanan and Sumers. 1968. "Stage Measurements at Gaging Stations". <br />Colorado Department of Health. 7986. "The Basic Standards for Ground Water-Draft Copy <br />(April)". <br />^_ 1986. "Classifications and Numeric Standards-Upper Colorado River Basin and North <br />Platte River (Planning Region 12)". <br />Environmental Protection Agency. 1976. "OUatity Criteria for Water". <br />Office of Surface Mining Reclamation and Enforcement <br />Statement, OSMRE-EIS-25". <br />1989, "Draft Environmental Impact <br />23 <br />