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<br />----- <br />S fnl'h Or- COl Ui.nfip ~m naqu ~o+ q,,.,,..,,. ~, III III III IIIIIII III <br />DEPARTMENT OF NATURAL RESOURCES <br />D. Monte Pascoe. Eaecu tive Director <br />191NEU LANU ItE(1LA111A'I'ION <br />423 Centennial Building. 1313 Sherman Street <br />Denver. Colorado 80203 Tel. (303) 866-3567 <br />David C. Shelton <br />Director <br />DATE: September 21, 1982 <br />TO: Sandy Emrich <br />FROM: David Craig ;~ <br />RE: Foi del Creek Min/e Completeness Review <br />I have completed my portions of the completeness review for the proposed <br />Foi del Creek underground mine. Specifically, I reviewed the geology, <br />ground water, and mine opening sealing portions of the application. The <br />following is a List of potential completeness issues that I have identified <br />as a result of my review. <br />1. The applicant has not presented an analysis of the geochemistry of the <br />roof and floor materials in the mine area. Instead, an analysis of <br />drill holes in the Eckman Park mine area has been presented. Because <br />the mine's development waste will be disposed of in a saturated pit, <br />it is important that any toxic or acid-forming material be accurately <br />delineated prior to disposal. The data presented by the applicant is <br />definitely not adequate. It is neither representative of the mine <br />area or adequately analyzed to accurately determine toxic or acid <br />forming strata. <br />2. The applicant has not supplied basic baseline hydrologic data regarding <br />the 7Wenty-h1i1e Sandstone aquifer. Specifically, no water quality, <br />water level, or aquifer hydraulics data has been presented. The <br />aquifer overlies the proposed mine workings. A distance of about <br />700 feet separate the mine workings from the aquifer. The applicant <br />states that because of this great distance, no impacts will occur. <br />While this assessment is certainly prudent, the potential for impact <br />still exists. The appropriate baseline data will be needed to complete <br />a credible statement of "Probable hydrologic Consequences". <br />