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- LO - <br />We expect that the Foundations of the conveyor will have <br />t.o reach sound and intact bedrock; the depth to it is not known, <br />~' but it may reach several tens of .feet. Piles or drilled piers <br />' aiay comprise the best foundation method for the conveyor. <br />We also believe that apart from this foundation method, it <br />will be necessary to stabilize a strip of soils along the <br />conveyor to prevent any deformations or slides of surficial <br />soils. The stabilization could probably be achieved with a <br />drainage system which would effectively lower the ground water <br />surface below the soil-rock contact. A detailed foundation in- <br />vestigation which includes drilling at the locations of indi- <br />vidual conveyor supports will be required prior to the conveyor <br />design. <br />+II <br />I <br />I <br />A_re_fu_se_pile (or waste rock storage) has been tentatively ~ <br />planned on a large and flat bench immediately south of the <br />landslide area (elevation about 6,640 feet and higher). The north <br />border of the pile would be located close to the distinct crest ~ <br />which forms the boundary between the landslide area and the bench) <br />above it. <br />We are concerned with the stability of the area close to <br />this crest; it is very probable that landslides in the Mount <br />Gunnison area have been developing as failures of bench crests <br />of this type. Any loading of the area above the crests increases <br />the risk of a new failure. <br />For this reason, we feel that it is important to avoid load- <br />ing of the bench part close to this crest. As there are no data <br />available on subsurface conditions of this part of the property, <br />it is difficult to specify a safe distance of the refuse pile toe <br />from the crest. We _`eel that for preliminary purposes a distance <br />of 150 feet is appropriate; it is based on morphologic obser- <br />iO~w~pOOOW W~4 K <br />