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CHIMNEY ROCK COAL MINE <br /> SURFACE WATER COND <br /> 1400 <br /> // <br /> ti <br /> k <br /> 4 <br /> * \ l A <br /> \ F \ \ k \ '+ \ k \ 4 F <br /> 200 <br /> • 11 13 15 17 19 <br /> • i 10 12 14 16 18 20 <br /> SAMPI-INGPERIOD <br />