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' MINREC, INC . ,~ ~~~ ~~~~~~~~~~~~~~~~ > <br />i. 999 _- ~y <br />2768 COMPASS DRIVE, SUITE 101 "'°° " <br />~~ GRAND JUNCTION, COLORADO 81506 <br />PHONE: (303) 245-4101, FAR 242-7908 UN 1 71992 <br />BLUE RIBBON MINE Mined Land <br />June 15, 1992 <br />C. E. Johnston <br />Mined Land Reclamation Division <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Re: Semi-annual Bench Monitoring <br />Permit C-81-047 <br />Dear Ms. Johnston: <br />The following table present the results of hydrologic monitoring on <br />the mine bench for the first and second quarter of 1992: <br />BENCH <br /> NORTH MIDDLE SOUTH <br />Date: 4-01-92 <br />Flow (gpm) 0.141 - - 0.031 <br />pH 8.1 - - 8.0 <br />Conductivity 3000 - - 3600 <br />Temperature 8°C - - 9°C <br />Date: 6-13-92 <br />Flow (gpm) 0.028 - - 0.039 <br />pH 7.7 - - 7.5 <br />Conductivity 2700 - - 4000 <br />Temperature 18°C - - 17°C <br />BENCH PIEZOMETERS <br />P-1 P-2 P-3 P-4 P-5 P-6 <br />Date: 4-01-92 <br />Depth to Water 3.4 34.7 24.2 24.8 19.4 8.5 <br />Date: 6-13-92 <br />Depth to Water 5.2 40.9 41.6 23.0 18.1 7.9 <br />