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Magnesium <br />Colowyo Coal Company L.P <br />500 <br />375 <br />m 250 <br />9 <br />1 <br />125 <br />0 <br />09/89 <br />09/91 <br />O NGSW <br />09/93 09/95 <br />09/97 09/99 <br />Date <br />