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REP02129
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REP02129
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Entry Properties
Last modified
8/24/2016 11:32:59 PM
Creation date
11/26/2007 10:10:01 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
11/1/1980
Doc Name
Landslide Study
From
Geo-Hydro Consultants
Permit Index Doc Type
STABILITY REPORT
Media Type
D
Archive
No
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1 ~~, <br />~~ - 4 - <br />I; <br />~: <br /> <br /> <br />' r <br />i. <br />it the simplified Bishop method was used for the purpose. The <br /> method of the analysis is described in the Appendix A; the <br />' ~ results are presented and discussed in the report. <br /> ~I 2.0 SITE CONDITIONS WITHIN THE LA.*IDSLIDE AREA <br />i <br />' 2.1 GEOLOGIC CONDITIONS <br />~' <br /> ~~; Geologic conditions of the area have been discussed in our <br /> ~~ Progress Report. Drilling of the borings at the mine entries <br /> and along the road alignment shows erratic geologic conditions <br /> as can be expected within a landslide area. Considerable soil <br />I <br /> ~, cover has been detected in most borings; it can be assumed that <br />1 ~~~ these soils comprise largely landslide deposits. Soil cover <br /> ~ thickness ranges generally between 20 to 30 feet; in one of the <br />' borings along the road alignment (boring A-6), bedrock could not <br /> ~i be reached even at the depth of 74 feet. <br />1 j <br /> Thickness of soils may increase within the part where the <br />' i~ mine bench will be located; all piezometer holes in this area <br /> were drilled in soils to depths up to 38 feet. <br />' W <br />ll <br /> ! <br />e can conclude that most excavations on the site wi <br />be <br /> performed in soils rather than in rock; there is enough support- <br />' ing data for this conclusion at the proposed mine bench area. <br /> ~I Borings drilled along the road indicate soil deposits of sig- <br />I <br />' nificant thickness as well, but it cannot be excluded that rocks <br /> will be encountered along the road during the excavation of <br />' i, higher cuts. <br /> <br />' Data from borings drilled for our purpose and data from old <br />~ ARCO exploration drilling enable a quite accurate interpretation <br />1 <br />~ ~ O~?NTWOCOKAAlN4 K <br />
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