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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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19 <br />' expected to be much more favorable than in the upper portion <br />j' where the mine entries and the upper road portion are located. <br />~' Only the upper part of the connecting road encounters similar <br />conditions as the acces road; our recommendations for this <br />' i connecting road are identical. <br />I <br />i It can be expected that the cut will be excavated in soils; <br />~'.• nothing is known about the ground water conditions. We re- <br />' 1• commend that the cut be again drained so that the saturation of <br />~; the cut slope is prevented. We feel that a drainage system <br />capable of dewatering to a depth of about ten feet should be <br />' ~. sufficient to maintain the long-term stability; it should extend <br />i <br />• between the toe and the crest of the cut. Similarly, dewatering <br />' ~ should prevent saturation of soils below the retaining wall <br />I' <br />I, supporting the fill on the north side of the pad. A good sur- <br />' face drainage system for the proposed facility is also essential. <br />', The_shop_and warehouse with the adjoining parking lot have <br />a very similar character to that of the previously discussed <br />i <br />substation; the same criteria can be applied for them. <br />i <br />1 <br />i, The runoff_pond_$_1_and the fresh water_pond_~_1 are located <br />------- ---------- <br />' outside the slide area. At the request of Merrick and Company <br />~~ representatives, we have inspected the design of the ponds to <br />' ~; evaluate their potential impact on the slide; we believe that <br />they have no impact on the stability of the old slides above them, <br />i <br />A waste rock conveyor will be built on the steep slope <br />~ portion of the landslide area between the mine entries and the <br />' ~~ crest which forms the transition between the slide area and the <br />II large bench above it. The steep slope is marginally stable as it <br />' ' has been shown in this report, in our progress report and as it <br />is evident from several small failures which developed within <br />' i this area. __. . <br />I <br />~.o.,.o.o~~.w..K. <br />
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