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~s ~ ~~ <br />AZURITE, Inc. <br />10001 County Road 12 <br />PO Box 338 <br />Cotopaxi, CO 81223 <br />719-942-4178 <br />Fax : 719-942-4178 <br />February 23, 2007 <br />~~ a~.,rP ~ ,~ <br />~~,~~ <br />State of Colorado <br /> <br />Division of Reclamation, Mining, and Safety Di: >' ~.~ ~~ R=~'~ '"~ <br />Attention: Erica Crosby, Environmental Protection Specialist ~°"""9 °'" "` "~ <br />1313 Sherman Street Room 210 <br />Denver, CO 80203 <br />RE: RESPONSE TO DMG ADEQUACY~REVIEW COMMENTS, Colorado Mazble, <br />Inc., Conversion Application Ol (CN-0 , M-1987-028 Lilly Mines, 112 Conversion <br />Adequacy Review, 2nd Response Letter, <br />Deaz Ms. Crosby, <br />Listed below are responses to comments sent to Mr. Addison dated January 30c' , 2007: <br />1) The division requires that the mine operator "maintain a ground configuration <br />condition that will route any overtopping flows from the lower pit to Taylor <br />Gulch on bedrock. While there is bedrock contact at the lowest, southern end of <br />the lower pit, routing of a lazge surface flow to Taylor Gulch will likely entail <br />excavation of colluvium materials to expose bedrock continually between the east <br />shoulder of FS Road 228 and Talyor Gulch. In the event that the bedrock <br />channel does not tranverse bedrock continually along this path, Colorado Marble <br />will commit to design and construct an approved routing via technical revision <br />submittal during the 2007 mining season. <br />2) The sediment pond structure shown on the future mining disturbance and <br />reclamation map is intended to help control stone related sediment loss on the <br />slopes of the waste rock dump below the present elevation of the lower staging <br />area. The waste rock dump outslope entails about 8 acres maximum slope. The <br />sediment pond will have arip-rapped spillway designed to handle storm flows of <br />50 CFS or less over a ten foot spillway dimension. The sediment pond will have <br />no connection to potential overflow from the lower pit, which will be routed to <br />discharge directly into sub-drainage azea channel lying west of and draining into <br />Taylor Gulch. <br />3) No comment. <br />