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REP39426
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REP39426
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Entry Properties
Last modified
8/25/2016 12:25:58 AM
Creation date
11/27/2007 8:23:32 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1974004
IBM Index Class Name
Report
Doc Date
4/29/2005
Doc Name
2005 Annual Report of Geologic Mapping
From
Lafarge North America
To
DRMS
Media Type
D
Archive
No
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<br />A sump pump continues to be utilized for controlling water in the pit. The <br />' sump located in the northeast comer of the main pit was noted to contain <br />water. Although at the time of inspection, no visible seepage into the sump <br />' could be detected. It is generally assumed that the sump is locally lowering <br />the groundwater in advance of the main pit floor. Borehole DH-03-01 from <br />' the 2003 geotechnical investigation is approximately 200 feet west of the <br />:sump, and was noted during this investigation to have groundwater at a <br />iiepth 1-foot below the existing ground surface (6,340 feet). <br />3) An the 2004 report, the rock mass in the southern expansion area was noted <br />as more massive with fewer discernable foliation surfaces than the rock <br />exposed in the main pit of the quarry. More importantly, the foliation <br />surfaces measured in the expansion area between the elevations of 6,990 <br />' to 7,075 feet, in general had a different overall orientation than the <br />dominant foliation that has been mapped within the middle level and main <br />' pit of the quarry. On average, this foliation set (F-2) was shown to dip 17° <br />to the southwest, as opposed to the 37° dipping south-southeast oriented <br />' foliation set (F-1) located in the rest of the quarry. In evaluating the merged <br />dataset for the southern expansion area using both the 2004 and 2005 <br />' data, the average dip of foliation F-2 is 25° to the southwest. <br />' 4) During the current investigation, an occasional foliation was measured that <br />dips to the north between 38° and 52°. The data collected reflecting this <br />' northerly dip was mainly obtained from the expansion area of the quarry <br />from the temporary walls (Figure 2). <br />' S) The rock mass exposed in the middle level of the quarry continues to have <br />' - a higher fracture density and be more weathered than the rock excavated in <br />the main pit (Photo 8). Iron oxide staining is common on many of the joint <br />' surfaces. <br /> <br />-t~- <br />
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