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-~- <br /> <br />• <br />• <br />joints which appears on all sections; joints of this set <br />strike approximately east-west and their dip is between 80 <br />to 90 degrees to either north or south. The second set of <br />vertical or subvertical joints is not as clearly defined as <br />the previous one. The strike of this second joint set changes <br />at individual sections. Generally, joints of this second set <br />strike northeast - southwest. Their dip is again between 80 <br />and 90 degrees. Joints other than vertical were identified <br />only in section 4; it does not appear that these joints form <br />a distinct set. <br />It can be concluded that only vertical joints are im- <br />portant for the stability of cuts within the study area. There <br />have been no other important joints identified. <br />3.0 GEOLOGICAL HAZARDS OF THE SITE <br />3.1 LANDSLIDES <br />The Colorado Geological Survey has mapped two landslides <br />in the vicinity of the Orchard Valley Mine. They are located <br />high in the slope above the mine at elevations about 8,000 <br />feet. One of the slides is mapped on the east facing slope <br />of a creek, east of the mine. We have reviewed the available <br />aerial photographs and inspected the site of these landslides. <br />We feel that if both these morphological features are really <br />landslides, they are very old and stable at present. <br />Both landslides are located at a sufficient distance from <br />the mine so that no interference to the mine surface facili- <br />ties from the landslides could be expected. <br />cfo.no~o caaun~c, iHC. <br />