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<br />Introduction <br />The information assembled in this 2000 Annual Hydrology Heport (AAA) includes <br />data collected £rom aDDroved monitoring sites established at 9eaeca Coal <br />Company's (SCC) Yoaet Mine (State Permit No. C-94-OB2). LOeatioas of monitoring <br />siren diacusaed in this report can be Eouafl by referring to Exhibit 7-1, <br />Hydrology Monitoring Map, which may be Found Sa the Yoaet Miae Permit <br />Application Package (PAP). <br />All re£arencea to 2000 (or to ^this year°) w311 be for Nater Year 2000 (October <br />1, 1999 through September 30, 2000) unless otheroviee anted. All tables referred <br />to is the Following text can be found in Appendix A. Ia addition, a table of <br />eoateate for Appendix A is given at the beginning o£ that appendix. <br />The Yoaet Miae Darmit went into effect oa August B, 1995. Overburden removal <br />• began is October 1996. Figure 1 shows the areas mined this year. Miaiag this <br />year has occurred in the Aanand Draw basin (NPDE310), the Grassy Creek basin <br />(NPDE811), and the Saga Creek basin (NPDES32). <br />Field coaduetivity and pH meters ware calibrate8 Drior to each day's use. The <br />conductivity meter ie calibratafl using a Dotsssium chlorifle eolutioa with an <br />electrical coaduetivity is the 1000 to 3000 umhoe/cm range. The p8 meter ie <br />calibrated using NBS trnceable buffers with pH valuee of 7 and 10. Lab analyses <br />have been performed by ACZ Laboratory is Steamboat 9priage, Colorado nines May <br />31, 1983. ACZ Laboratory performs all analyses bl' EPA or equivalent methods. <br />Samples are delivered the day of collection to the lab is ea icefl cooler. <br />SCC iaetituted is 1995 a new monitoring site numbering eyatem For ire new <br />Yarndox" venter quality database. Thin new system ie dataile8 is Tnble A. For <br />coaveaience sake, this table hen been plnced at the sad of the Table of Contents <br />(nee previous page). <br />A new NPDES amendment west into effect oa September 1, 1999. This amendment <br />• authorized a reduction in monitoring frequency (from weakly to monthly) at <br />1 <br />