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- 15 - <br />• <br /> <br />• <br />grees. All of the cut slopes in soil have been carefully and <br />successfully revegetated. It should be mentioned that re- <br />vegetation of cut slopes that are so steep is very unusual. <br />Successful revegetation of cut slopes and very favorable <br />physical properties of the colluvial soils have contributed <br />to the generally very good stability of all cuts. Sloughs <br />of these cuts are practically non-existent and no other in- <br />stability features have been observed during our inspection. <br />Obviously,. the cut slopes on the order of 50 degrees are <br />very steep for unconsolidated sediments. The experience of <br />several years shows, however, that no stability problems have <br />been encountered. We feel that for this reason, no remedial <br />actions are required for cuts excavated in soil. <br />The owner and operator of the mine should be aware that <br />there is some risk that local failures may occur in these <br />cuts. <br />4.5 MAN-MADE FILLS <br />There is a substantial number of large fills that have <br />been constructed .on the site. Fills were used at practically <br />all operational levels of the mine. Numerous fills have been <br />constructed along the road that interconnects individual <br />mine levels. There is little information on the construction <br />of these fills available.It is probable that many of these <br />fills have not been constructed as engineering fills; they <br />might have been constructed as dumped fills only. Some in- <br />formation is available on the material and construction pro- <br />cedures of the highest fill that forms most of the crushing <br />and screening level, This fill has been constructed from <br />various materials, including possibly coal, that were dumped <br />~oa+mno caanarow, n~c. <br />