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III IIIIIIIIIIIIIIII <br />blue <br />cb~bon <br />company <br /> <br />A>'R 211g~ <br />April 17, 1986 <br />Susan Mowry <br />Reclamation Specialist <br />Colorado Mined Land Reclamation <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203-2273 <br />MINED LAND RECLAMATION <br />Colo. Dept. of Naf~lral Rasourc~ <br />blue ribbon coal company <br />p.o. box 1352 <br />palisade, Colorado 61526 <br />(303) 464-7951 <br />Subject: Quarterly Bench Hydrologic Monitoring Data - File #C-047-81 <br />Dear Susan: <br />The following is the results of hydrologic monitoring on the restabilized <br />mine bench for the first quarter of 1986. <br />North Subdrain <br />Date 1/27/86 2/28/86 3/27/86 <br />Flow (gpm) none 0.25 0.5 <br />pH 7.8 7.5 <br />Conductivity 1180 @ 11°C 1220 @ 7° <br />Middle Subdrain <br />Date 1/27/86 2/28/86 3/27/86 <br />Flow (gpm) none none none <br />pH <br />Conductivity <br />South Subdrain <br />Date 1/27/86 2/28/86 3/27/86 <br />Flow (gpm) dripping 0.4 1.4 <br />pH 8.1 7.6 7.6 <br />Conductivity 1680 @ 1°C 2420 @ 7°C 3100 @ 7°C <br />Bench Piezometers <br />Date 1/27/86 2/28/86 3/27/86 <br />P-1 21.4' 21.5' 21.7' <br />P-2 none none none <br />P-3 44.6' 45.4' 46.1' <br />p_q 21.9' 22.3' 23.5' <br />