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PERMFILE128342
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PERMFILE128342
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Last modified
8/24/2016 10:25:28 PM
Creation date
11/25/2007 5:59:43 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1988112
IBM Index Class Name
Permit File
Doc Date
11/8/1988
Section_Exhibit Name
EXHIBIT D MINE PLAN
Media Type
D
Archive
No
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1 <br />' boreholes, BH-10, was completed as a piezometer. the completion <br />details for this piezometer are included in Appendix E. Based <br />' on the results of the subsurface exploration program, the sites <br />are generally underlain by relatively deep colluvial/alluvial <br />' deposits composed predominantly of poorly consolidated silty <br />and gravelly sands. The contact between the more recent <br />' colluvial/alluvial soils and the underlying poorly cemented <br />Santa Fe Conglomerate is difficult to discern. Based on <br />Standard Penetration Tests (SPT) and California Barrel blow <br />' counts, the Santa Fe Conglomerate may have been encountered <br />at a depth of approximately 40 ft in BH-10 and 10 to 15 ft in <br />' BH-g. Clay content in the subsurface materials is generally <br />low with the majority occurring in discontinuous pockets of <br />' topsoil and as scattered lenses interbedded with sands <br /> throughout the profile. Relatively clean sands and gravel occur <br /> locally in the intermittent stream channels and in interbedded <br />' layers at depth. Test pit logs and borehole logs are contained <br /> in Appendix C. Test pit and borehole locations are shown on <br />' figure C.1. The results of laboratory tests conducted on <br />selected samples from these test pits are included in Appendix <br />1 ° <br />' Groundwater was encountered in BH-10 approximately 46- <br />ft below the ground surface. This borehole is located in a <br />moderately incised dry creek channel. In BH-g, which is located <br />' higher of a hillside, groundwater was not encountered within <br />the 80-ft borehole depth. <br />Waste rock disposal areas A and B cover approximately <br />' 49 acres and 40 acres, and are designed to store 2,].50,000 tons <br />and 4,320,000 tons, respectively. Waste rock disposal area C <br />' covers approximately 18 acres and is designed to store <br />1,200,000 tons. Waste rock disposal area D covers approximately <br />30 acres and is designed to store approximately 2,000,000 tons. <br />1 <br />D-14 <br />1 <br />
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