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2010-04-08_PERMIT FILE - M2008012
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2010-04-08_PERMIT FILE - M2008012
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Last modified
8/24/2016 4:03:35 PM
Creation date
4/12/2010 1:36:43 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M2008012
IBM Index Class Name
Permit File
Doc Date
4/8/2010
Doc Name
Response to Preliminary Adequacy Review
From
BCI
To
DRMS
Email Name
GRM
Media Type
D
Archive
No
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Following are Nuvemco's responses to Memo from "DRMS geochemist David <br />Bird" dated March 10, 2010. <br />Appendix E. Ground Water Monitorin <br />DRMS response: For all wells on the property, please provide completion diagrams, well logs, <br />location maps, and a geologic cross-section showing the completion of the wells with respect to <br />the underlying geology. <br />Attached, as modified from Appendix E for the Monogram 112d permit are details describing the <br />absence of groundwater from Davis Mesa in the vicinity of Last Chance Mine. The monitoring <br />well locations were chosen to penetrate the upper Morrison Formation ore bearing sands present <br />near both mines. Davis Mesa is narrower at the Last Chance Mine with dry Morrison sands <br />exposed in cliffs on both sides of the mesa. It includes completion diagrams and schematic cross <br />section. <br />Exhibit G. Water Information <br />The application states that no ground water has been encountered in existing shafts at the <br />Last Chance Mine and that the Mesa has historically had dry mines. The application also <br />states that "limited water which may exist in abandoned mines is from open shafts, vents or <br />drill holes which were not properly abandoned." <br />The quote from Dick White in the DOE PEIS was more regional and referring to the DOE <br />acreage east of Last Chance. Also, the Monogram Mines which are between the DOE and Last <br />Chance were historically dry. <br />DRMS response: The mining plan does not provide sufficient details to indicate whether the <br />workings will gain sufficient length and depth to perhaps intercept ground water. Please <br />provide the anticipated mine plan and the maximum depths and lengths of expected mine <br />workings. The depiction of the working would be useful plotted on a geologic cross-section. <br />Nuvemco is seeking to drill exploration boreholes in the vicinity of the Last Chance Mine to aid <br />in the geologic interpretation. A schematic cross section from Wild Steer Canyon through the <br />Last Chance Mine to Paradox Valley illustrates the perched nature of the Morrison Salt Wash ore <br />sandstones well above the valleys and void of active aquifers as evidenced by the dry mines and <br />the lack of springs on the cliffs and steep slopes of the valleys. <br />Exhibit T; Part 1, General Plan <br />Depending on the ultimate depth and length of mine workings, formation of a mine pool <br />should be added as a potential disturbance to the prevailing hydrologic balance. <br />20 <br />
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