2014-01-30_REPORT - M1973021

• Permit No: M1973021
• IBM Index Class Name: Report
• Doc Date: 1/30/2014
• From: Jeremy Deuto
• To: DRMS
• Annual Report Year: 2013
• Permit Index Doc Type: Annual Fee/Report
• Email Name: PSH
• Media Type: D
• Archive: No

was typically very wide. The persistence of the joints was also widely variable but
was typically low. Apertures of the joints were moderately open to tight with
slightly rough to rough faces and were slightly weathered.
Small blocks may form in this area due to the orientation of the highwall and joint sets of the
rock. In addition, due to the fractured nature of the rock and highwall weathering, raveling of
small to medium sized rocks can also be expected. These rocks resulting from block
formation and raveling are anticipated to be limited in size, and should be retained on the
bench below the highwall and only cause local operational delays.
Sta. 0 +80 to 1 +70 trended 045 (north 45 degrees east). This section of the highwall
was not mappable due to overburden, mine waste, and/or rockfall obscuring the
wall. However, it is assumed the highwall conditions are similar to adjacent
observable /mappable sections.
Sta. 1 +70 to 2 +30 consisted of primarily of granitic rock with localized gnessic
pockets. Rocks observed within the highwall typically exhibited high compressive
strength (estimated) and poor quality RQD. The trend of the highwall was 045
(north 45 degrees east). Two primary joint sets were evident. The first set exhibited
a strike ranging from 210 degrees to 225 degrees with dips ranging from 70 to 85
degrees. The spacing between of these joints varied, but was typically close to
moderate. The persistence of the joints was also widely variable, but ranged from
medium to high. Apertures of the joints were tight to moderately open with slightly
rough to rough surfaces and were moderately weathered. The second primary joint
set exhibited a strike ranging from 110 degrees to 280 degrees with dips ranging
from 50 degrees to 85 degrees. This joint set had similar properties to primary joint
set 1— high rock strength, poor quality RQD, wide to moderately spaced joints,
medium to high persistence, tight to open joint apertures, and slightly rough to
rough rock surfaces with moderate weathering.
One secondary joint set was present within the 7470 highwall from Sta. 1 +70 to
2 +30. The joint set exhibited a strike ranging from 20 degrees to 30 degrees with
dips of approximately 15 degrees. The spacing between of these joints varied, but
was typically wide. The persistence of the joints was also widely variable but was
typically low to medium. Apertures of the joints were moderately open to tight
with slightly rough to rough faces and were moderately weathered.
Small blocks may form in this area due to the orientation of the highwall and joint sets of the
rock. In addition, due to the fractured nature of the rock and highwall weathering, raveling of
small to medium sized rocks can also be expected. These rocks resulting from block
formation and raveling are anticipated to be limited in size, and should be retained on the
bench below the highwall and only cause local operational delays.
A photo documentary of Bench 7470 is presented in Figure 6.
GEI Consultants, Inc. 9 January 2014
2013 Morrison Quarry Annual Report