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-iii iiiiiiiiiiiii iii <br />STATE OF COLORADO <br />OFFICE OF THE STATE ENGINEER <br />Division of Water Resources <br />Department of Natural Resources <br />1313 Sherman Street, Room 818 <br />Denver, Colorado 80203 <br />Phone 1303) 866-3581 <br />FAX (303) 866-3589 <br />Mr. Kent Gorham <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Foidel Creek Mine (Permit No. C-82-056) <br />Technical Revision No. 23 <br />Dear Mr. Gorham: <br />October 26, 1995 <br />~°> .d r <br />~~~ RFCEivEo <br />OCT 2 6 1995 <br />Division of Minerals & neology <br />pF' COQ . <br />i.4,- 'F~ <br />Ne , <br />•: < <br />~ r896 ~ <br />Roy Romer <br />Gnverno~ <br />lame, 5 Lochhcad <br />ftecurire Director <br />Hal D. Simpson <br />Slate EnRmcer <br />This office has reviewed the Technical Revision /t23 referenced above for the Foidel Creek <br />Mine with regazd to water resources impacts. <br />The proposed technical revision will apparently have no additional water resource impact except <br />the reclamation of the air ventilation shaft mentioned in Technical Revision No. 23. The revision <br />has a statement that backfilling of the ventilation shafts were to be accomplished with "inert <br />material." However, a handwritten note specifies "grouted aquifers." <br />Your attention is called to Rule 15 of the Water Well Construction Rules (2 CCR 402-2) which <br />I've hand~azried to your office earlier. You'll note that rule 15.3 deals with seals between aquifer <br />layers which may be applicable if a confining layer has been penetrated. Otherwise, Rule 15.2 and <br />15.2.1 are applicable rules for plugging and sealing wells. <br />Except for the possible mis-statement of plugging and sealing of ventilation shah borehole <br />which, hopefully, would maintain aquifer integrity to the same standard as the aforementioned Water <br />Well Construction Rules, this office perceives no adverse water resources impacts for the proposed <br />technical revision at this time. <br />Sincerely, <br />llC,/v ~'IGC~ <br />Chuck Roberts <br />Professional Engineer III <br />CGR/jmg <br />6719L.cgr <br />