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• <br />• <br />• <br />MINREC, INC., BLUE RIBBON MINE <br />1999 ANNUAL HYDROLOGIC REPORT <br />JANUARY 1, 1999 THROUGH DECEMBER 31, 1999 <br />INTRODUCTION <br />~iECEIVED <br />DEB 22 2000 <br />Div'~sion of Minerals 8 Geology <br />The Blue Ribbon Mine went into permanent cessation in 1986 and the majority of <br />reclamation was completed that year. A minor amount of grading was done in 1987 on the <br />portal bench to improve drainage. During 1988, 1989 and 1993 portions of the bench <br />cover material slumped and were repaired and seeded. <br />The hydrologic monitoring plan is contained in the permit document, pages 124 and 124a <br />which were revised July 28, 1994 and October 10, 1995 respectively. Exhibits H-1 and Z <br />show the various monitoring locations. <br />SURFACE WATER <br />The following table shows the flow, pH and conductivity for upstream and downstream <br />Hubbard Creek by quarter for 1999 compared to the same month averages from 1982 <br />through 1999. <br /> Upper Hubbard Creek Lower Hubbard Creek <br />Quarter Parameter AVE 1999 AVE 1999 <br /> <br />1st Flow, cfs 24.6 5.8 - - <br /> pH 8.0 7.6 8.0 7.8 <br /> Cond-umhos/cm 199 210 216 170 <br />2nd Flow, cfs 33.3 5.8 - - <br /> pH 8.1 8.3 8.0 8.8 <br /> Cond-umhos/cm 224 250 233 240 <br />3rd Flow, cfs 6.2 4.8 - - <br /> pH 8.2 8.4 8.1 8.4 <br /> Cond-umhos/cm 256 220 268 240 <br />4th Flow, cfs 6.9 2.6 - - <br /> pH 8.1 8.6 8.1 8.4 <br /> Cond-umhos/cm 222 280 268 280 <br />