Laserfiche WebLink
~^ <br />AZURITE, Inc. <br />10001 County Road 12 <br />PO Box 338 <br />Cotopaxi, CO 81223 <br />719-942-4178 <br />Fax : 719-942 <br />October 12, 2006 <br />State of Colorado <br />Division of Minerals and Geology <br />Attention: Erica Crosby, Env. Protection Specialist <br />1313 Sherman Street Room 2I0 <br />RECEIVED <br />r~CT 16 2006 <br />Division otand Safety n. <br />1 ,, Mining <br />Denver, CO 80203 <br />cl <br />RE: LILLY MINES M-1987-0 ,Response to Geotechnical Adequacy Review June 1, <br />2006 <br />1. Secondary jointing pattern in the marble deposit as stated was a typographical <br />error, should have been stated as striking N90E and dipping 76 degrees South. <br />2. After careful consideration of the Division's comments concerning surface water <br />flow diversion from above the highwall area into the lower pit, Colorado Mazble <br />feels that it is in the best interest of the operator and surrounding Land owners to <br />continue this long standing surface water control practice. There aze a number of <br />reasons for continuing this practice that include: <br />a) Since the start of surface mining operations in the mid-80's, surface run- <br />offfrom storm events, snow melt, and intermittent flow from former <br />underground mining operations above the highwal] azea has been diverted <br />to the lower pit. This practice has proven to be effective in mitigating <br />potentially lazge volume dischazges from high melt-off periods or storm <br />related flows that would otherwise move downstream with likely <br />unfavorable impacts to land owners located along Taylor Gulch drainage <br />near Garfield, Colorado, a historic mining town 2 miles south of the mine <br />site. Present day water flow patterns reflect low flow, (5-10 gpm) albeit <br />constant flow conditions where households utilize Taylor Gulch water <br />flow for in-house domestic use. Changing downstream water flow <br />parameters at this point in time will likely increase storm related volume <br />dischazge and adversely impact landowners along the lower reaches of <br />Taylor Gulch. Continuing this practice will most likely instrument the <br />least change in downstream chazacteristics experienced by neighboring <br />landowners and the least risk of water related negative impacts. <br />~/ <br />