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r iii iiiiiiiiiiiu iii <br />~~ <br />STATE OF COLORADO <br />DIVISION OE MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St, Room 215 <br />Denver, Colorado 80203 D I v 1 5 l O N O F <br />Phone: (303) 866-3567 MINERAL S <br />FAX: (3031 832-8106 be <br />GEOLOGY <br />REC IA MATION <br />~~~~ MINING•SAFETY <br />Date: December 17, 1999 G~ r' ' <br />P~y~. <br />1/ Rq~C~ Bill Owens <br />To: Christina Kamnikar ~~~~t f% ~ Gorernor <br />('~~~~~~~ tr~C Greg E. Walther <br />~!/p~~~-/f~/ Executive Ducclor <br />From: Harry Posey ~ J Michael B Long <br />Division Director <br />Subject: Review: Response letter and report, Southdown Inc., Lyons Quarry, Technical <br />Revision-001; M-77-208 <br />The captioned document, dated December 1, 1999, has three additional provisions over those <br />already submitted. 1 believe the additional provisions plus the proposed frequency of monitoring <br />and the monitoring parameters would be adequate provided the following could be added. <br />1. Field and lab pH and conductivity should be added to the monitoring parameters. <br />2. The operator should commit to spraying the freshly deposited CKD with water to <br />promote crystallization and inhibit leaching. <br />I did not review the HELP model parameters or results. Except for that, I have no other <br />comments and would recommend approval of the TR. <br />cc: Carl Mount <br />Jim Pendleton <br />