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REV04008
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REV04008
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Entry Properties
Last modified
8/25/2016 1:02:01 AM
Creation date
11/21/2007 9:14:02 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981015
IBM Index Class Name
Revision
Doc Date
2/24/1994
Doc Name
Slope Stability Analysis
From
GREG LEWICKI AND ASSOCIATES
To
DMG
Type & Sequence
SF1
Media Type
D
Archive
No
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1 <br /> <br />' 1. Introduction <br />' In 1990, a reclamation only permit application was submitted to <br />the Colorado Division of Minerals and Geology which demonstrated <br />through slope stability analyses that the fill slope which was <br />constructed for the Fruita #1 mine portals did not meet the long <br />tezm slope safety factor requirement of 1.3. Since the original <br />slope was steeper than the slope that existed at that time, it <br />was deemed that the original slope could not be restored and that <br />' the only way to achieve the acceptable slope safety factor of 1.3 <br />was to lessen the slope on the fill embankment. Slope stability <br />cases were run to confirm these beliefs. However, no cases were <br />' run at that time to verify that backfilling of the cut slope <br />would not meet the required slope safety factor. This report <br />verifies that, using all reasonably available fill, the slope <br />' cannot be restored to its approximate original contour. Slope <br />stability analyses are the basis for the demonstration. <br />' The pictures on the following page show the portal area and fill <br />slope during mine operation and after reclamation in 1990. <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br />
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