2013-01-31_REPORT - M1973021 ‎(2)‎

• Permit No: M1973021
• IBM Index Class Name: REPORT
• Doc Date: 1/31/2013
• Doc Name: Annual Report and Geotechnical Addendum.
• From: Tetra Tech
• To: DRMS
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: TAK
• Media Type: D
• Archive: No

below the highwall. Due to the moderately to highly fractured nature of the rock, raveling is to
be expected in this area. Raveling from this zone should be retained on the bench below the
highwall and is anticipated to cause only local operational delays.
• Stations 14 +95 through 17 +90 consisted of highly to moderately fractured granitic
gneiss. The foliation strike varies in this area due to minor folding and ranges from
80 to 350 degrees. Foliation dips ranged between 10 and 35 degrees southeast.
Foliation spacing ranges approximately from less than 2 inches to approximately 1
foot, and foliation apertures were moderately open to very wide and slightly rough to
rough. The primary joint set strike ranges from 250 to 265 degrees and generally dips
from 80 to 85 degrees southeast. A second primary joint set is evident in this area
and exhibits a strike of 140 to 150 degrees with a dip of 60 to 65 degrees northeast.
The spacing of the primary joint sets varied widely, but averaged approximately 6
inches. Joint apertures were moderately open to very wide with slightly rough to
rough faces.
• A secondary joint set is evident in this area and exhibits an average strike of 125
degrees with an average dip of 25 degrees northeast. The spacing of the secondary
joint set varied, but averaged greater than 6 feet. Joint apertures were moderately
open with slightly rough to rough faces.
• The highwall in this area appears to be nearing the shear zone, as evidenced by the
appearance of slightly altered granitic /sillimanitic in the lower portions of the
highwall near stations 15 +50 to 16 +50.
Small blocks may form in this area due to the orientation of the highwall and jointsets of the
rock. These blocks are anticipated to be limited in size, and should be retained on the bench
below the highwall. Due to the moderately to highly fractured nature of the rock, raveling is to
be expected in this area. Raveling from this zone should be retained on the bench below the
highwall and is anticipated to cause only local operational delays.
• Stations 17 +90 through 19 +60 consisted of highly to moderately fractured granitic
gneiss. The foliation strike varies in this area due to minor folding and ranges from
10 to 15 degrees. Foliation dips ranged between 20 and 30 degrees northwest.
Foliation spacing ranges approximately from less than 2 inches to approximately 1
foot, and foliation apertures were moderately open to open and slightly rough to
rough. The primary joint set strike ranges from 145 to 170 degrees and generally dips
from 65 to 80 degrees northeast. A second primary joint set is evident in this area and
exhibits a strike of 60 to 75 degrees with a dip of 85 to 90 degrees northwest. The
spacing of the primary joint sets varied widely, but averaged approximately 6 inches.
Joint apertures were moderately open to open with slightly rough to rough faces.
Small blocks may form in this area due to the orientation of the highwall and jointsets of the
rock. These blocks are anticipated to be limited in size, and should be retained on the bench
below the highwall. Due to the moderately to highly fractured nature of the rock, raveling is to
10
Morrison Quarry Annual Report 2012
P \23514 \133- 23514- 13002\Dehverables\Dehv -01 -2012 Annual Report \Annual_Report_2012_Geotech doc
January 2013