Laserfiche WebLink
<br />- • • <br />STATE OF II I I it l 11 l 11 fill lli <br />COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmem of Nolural Resources <br />~F <br /> <br />1313 Sherman 51., Room 215 ' <br />D~•rn~er, Colorado 80?03 <br /> <br />Phone: 1303) 866-3567 <br />DIVISION OF <br />M I N E R A L ~- <br />FAX: 1303) 8328106 $c ~~ <br /> GEOLOGY' <br />~ <br /> ; <br />RECLAMATIOh <br />MINING•SAfETY"~ <br />May 25, 2001 <br /> Bill Owens <br /> Governor <br /> Greg E. Walther <br />Mr. William A. Bear Jr. Etec°~i°~ Direc~nr <br />Bowie Resources Limited hhchael B. Leng <br /> Division Director <br />P.O. Box 483 <br />Paonia, Colorado 81428 <br />RE: Technical Revision No. 20, Fifteen De-Gas Holes, Bowie No. 2 Mine, Permit No. C-96- <br />083, Bowie Resources Limited <br />Deaz Mr. Bear: <br />The Division has finished its review of the Bowie Resources Limited (BRL) submittal for <br />Technical Revision No. 20. The Division has the following questions or comments. <br />With the approval of Technical Revision No. 11, the Division accepted a generic well <br />completion diagram for the gob de-gas boreholes. However, since there will be many <br />such boreholes, the Division believes that individual well completion diagrams would be <br />more appropriate. Therefore, following installation of the gob de-gas boreholes, please <br />provide a well completion diagram for each of the boreholes. Well casing and perforated <br />well casing intervals should be included in the completion diagrams. In addition, any <br />aquifers or saturated zones encountered during drilling should be depicted on the <br />appropriate completion diagram. Finally, please provide individual well completion <br />diagrams for those gob de-gas wells that have already been drilled. <br />2. Please provide revised text that explains the difference between an upgraded road and a <br />refurbished road. <br />The reclamation estimate states that cement will be used to completely fill the gob de-gas <br />boreholes upon reclamation. However, the submittal cover letter states that cement or <br />other appropriate material will be used to seal the de-gas boreholes. Please clarify. The <br />Division's position is that cement, rather than cuttings, should be used top to bottom for <br />de-gas borehole sealing. <br />4. Please provide a discussion in Section 2.05.4(2)(8) of the permit application, found on <br />