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GENERAL36516
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Last modified
8/24/2016 7:57:02 PM
Creation date
11/23/2007 8:46:08 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981010
IBM Index Class Name
General Documents
Doc Date
10/30/2006
Doc Name
Additional Information Request Re 10/8/06 Landslide
From
DRMS
To
Trapper Mining Inc.
Permit Index Doc Type
General Correspondence
Media Type
D
Archive
No
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otherwise had an effect upon, the landslide. <br />• The effects of water and hydrostatic pressures upon the landslide. This should include <br />precipitation data collected at the Trapper Mine between September 1, 2006 and October 8, <br />2006, and a determination as to whether precipitation contributed to, or otherwise had an <br />effect upon, the landslide. <br />• The failure surface/zone within the stratigraphy of the landslide azea. Please determine <br />how this failure surface/zone may have contributed to the landslide. <br />• The structural geology of the slide azea. Please determine how the structural geology may <br />have contributed to the landslide. <br />• The location and extent of the "scoria" outcrop neaz the southwest corner of the landslide. <br />Please determine whether this geologic feature contributed to the landslide. <br />• The shear strength, cohesion, and angle of friction of the materials in the failure <br />surface/zone. <br />• The amount and weight of materials that contributed to the driving forces of the slide. <br />• The total forces that drove the slide, the resistive forces from side or boundary conditions, <br />and the forces that arrested the slide. <br />• How the information regarding the cause of the landslide pertains to current and future <br />mining and reclamation operations at the Trapper Mine. <br />2. The printouts of dewatering well data provided to Division personnel during the October 10-12, <br />2006 Division inspection plot information from the date each well was drilled through the date of <br />the landslide. Unfortunately, given the horizontal scale of these charts, the data points plot too <br />close together to accurately discern water level behavior at discrete collection dates. Please <br />resubmit these charts with dewatering well data over the period from just October 2005 to <br />October 2006. <br />3. Please enlazge the information provided on the "Geotechnical Monitoring Dewatering Wells" map <br />for the dewatering wells in the G-dip and G-strike mining areas. The font size used for the <br />dewatering well labels on the map was so small as to make the label illegible. Please also provide <br />information pertaining to the depth and screened interval for each well. <br />4. Dewatering wells DW 2, DW 23, DW 24, DW 26, DW 27, DW 28, Gl, and GP1 test were <br />identified on the water level data plots provided to the Division during the October 10-12, 2006 <br />Division inspection. We aze, however, unable to locate these particulaz wells on the <br />"Geotechnical Monitoring Dewatering Wells" map. Please resubmit this map with these wells <br />located on this map. 1f any of these wells have been mined through or abandoned, please provide <br />a description of the disposition of those wells. <br />
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