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Spoil springs will eventually develop as mine pits in the lower lying areas are backfilled and <br />subsequently resaturate. They will be monitored semiannually and for the same parameters as the <br />existing springs as stated in Table 1 5-9. <br />NPDES Sites. SCC maintains a Colorado Discharge Permit (Permit No. CO-00002211 that authorizes <br />discharges into State waters. During the firs[ five-year permit period, the Yoast Mine will discharge <br />into Annand Draw from the NPDESIO pond and into Grassy Creek from the NPDESII pond. NPDES <br />Ponds 12 to 14 are in the Sage Creek basin and will be constructed during the second five-year permit <br />period. Monitoring of NPDES discharge points will be conducted in accordance with the NPDES permit <br />which may be found in Appendix 15-1. A revised NPDES permit will be obtained prior to any new <br />NPDES pond discharges. <br />Literature Cited <br />Brankensiek, D.L., H.B. Osborn, and W.J. Rants. 1979. Field Manual for Research in Agricultural <br />Hydrology. U. S. Department of Agriculture. Agriculture Handbook. 550 p. <br />Buchanan, T.J. and W.P. Sumers. 1968. Stage Measurements at Gaging Stations. U.S. Geological <br />Survey TWI 3-A7. 28 p. <br />Driver, N.E. and R.S. Williams, Jr. 1991. Water-Quantity and Water-Quality Data for an Area Leased <br />to be Surface Mined for Coal in Northwestern Colorado. U.S. Geological Survey Open File <br />Report 90-708. Denver, Colorado. <br />Williams, R.S., Jr. and N.E. Driver. 1982. Plan for Hydrologic Study of an Area to be Surface Mined <br />for Coal in Northwestern Colorado. U.S. Geological Survey Open File Report 82-874. Denver, <br />Colorado. <br /> <br />25 Revised 2/99 <br />