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<br />C J <br />• <br />are shown on Plate C-9. <br />The method ultimately selected for increasing the <br />stability of the slope should be based on cost and practi- <br />cality of the alternate construction procedures. The steep <br />natural slope which rises above the crest of the cut could <br />make simply flattening the existing slope from its toe im- <br />practical, yet it may be difficult to produce a properly bal- <br />anced cut and fill which results in a uniform slope angle. <br />FThichever method is used for increasing the stability <br />of the slope, it is probable that the existing drainage ditch <br />will be filled by the reconstruction and will have to be re- <br />located. <br />If the mine management decides to postpone the re- <br />medial measures until more supporting data are collected with <br />the help of appropriate monitoring systems, at least two in- <br />clinometers and two piezometers would be desirable in the <br />area as the recommended monitoring system. <br />4.2.4 Other Soil Cuts <br />Other cuts that have been excavated in soils have <br />been documented during Phase 1 of our study (see our report <br />titled "Geotechnical Review, Orchard Valley Coal 1`line, Paonia, <br />Colorado, for Colorado idestmoreland, Inc.", dated July, 1981). <br />In this report, we have evaluated the soil cuts as <br />being excavated at slopes between 45 to 55 degrees; such <br />slopes are very steep for unconsolidated sediments. It was <br />also observed that the surfaces of these cuts have been ex- <br />ceptionally well vegetated; because of the vegetation, the <br />- 27 - <br />GEONYDRO CONSU Li1NG, INC <br />