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2010-02-16_REPORT - M1974004 (2)
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2010-02-16_REPORT - M1974004 (2)
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Last modified
8/24/2016 3:59:38 PM
Creation date
2/17/2010 8:05:34 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1974004
IBM Index Class Name
REPORT
Doc Date
2/16/2010
Doc Name
Structural Geology Evaluation
From
Lafarge West, Inc.
To
DRMS
Permit Index Doc Type
Annual Fee/Report
Email Name
DB2
Media Type
D
Archive
No
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3.0 Data Collection <br />3.1 Discontinuity Measurements <br />Structural geologic data collected for this evaluation included the observation and <br />measurement of orientation (strike and dip) of the geologic discontinuities from the newly <br />exposed rock faces in the quarry, descriptions of the character of the discontinuities and <br />data point locations (taken relative to generally measured wall locations). Measurements <br />were taken from the faces of advancing benches in both the southern expansion area, and <br />in the main pit of the quarry. A handheld GPS was used to obtain wall location information <br />and to identify where the structural data were collected from. <br />Discontinuity measurements were obtained utilizing a Brunton compass both indirectly by <br />sighting along the discontinuity surface; and where deemed safe, by direct measurement <br />' on the discontinuity surface. Field inspection and data collection occurred quarterly <br />starting in April of 2009 and completing in January of 2010 and did not interfere with <br />' normal production mining activities. In September of 2009, Maptek performed a <br />demonstration at the quarry using a mobile mapping system they have recently started <br />using that allows for high resolution topography imaging of the site quickly and efficiently. <br />The data from this has not been viewed by L&A at this time, but it is anticipated that any <br />' pertinent data will be incorporated into future reports. <br />' A total of 13 discontinuity measurements of the prominent joint sets were collected and <br />added to the measurements from previous years. When combined with data collected <br />' from previous annual reports (1997-2002, 2004-2009) and with borehole geophysical data <br />collected during the 2003 geotechnical investigation, a total of 3066 strike and dip <br />measurements of discontinuities in the quarry have been obtained over the past 13 years. <br />Figure 4 is a stereographic contour plot of all of the data collected since 1997. <br />1 <br />Mining activity has occurred in the main pit since the last report and additional data points <br />' and observations during this study were collected from this area (Photo 4). The new sump <br />appeared to look similar overall to the 2009 investigation with the exception of the <br />-5- <br />Lache! & Associates <br />4 slHRABE1 f- GlNprRtNG C:INQANY
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