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Mid-Continent Resources Mine #5 <br /> Lack of material precludes backfill of the entire cut above the portal, moreover, <br /> the fact that this is an avalanche zone must be considered. Backfilled material <br /> placed against the cut will be subject to the extreme forces of avalanching. If <br /> extensive backfilling is done here, the the material would be carried over the <br /> slope and down to the upper reaches of Coal Creek, following the path of the <br /> outwashed material presently in the lower yard area. In the interest of stability <br /> and of the protection of Coal Creek, fill material placed over the portal will be <br /> kept at a relatively low angle along the base of the cut. <br /> Sector 1 B <br /> Colluvial material has achieved a relatively moderate slope along the base of the <br /> cut, and the bench itself will be left as a base for this material, except that the <br /> bench will be narrowed at its outer perimeter as material is pushed down over <br /> the road-way below, or used to bury the concrete foundation of the lamphouse. <br /> This foundation will be ripped or torn before burial. <br /> The low points on the hillside above suggest drainage/snow pass onto the bench <br /> from these areas. Consequently, The east end of the bench will be graded to a <br /> rolling dip/swale, see illustration, with gentle side slopes angled to a point below <br /> the low point of the hillside above. A second, smaller dip may be added below a <br /> second low point in the hillside above along the outside of the bench at a point <br /> just east of the lamphouse foundation. <br /> Sector 1 C <br /> The far east end of the bench will be built up/bermed to prevent flows from the <br /> slide zone%verland flow area (further east) coming down to the bench, and <br /> angled gently toward the eastern-most swale, so that drainage from this end of <br /> the bench flows to the low point of the swale. <br /> Area 2 <br /> Sector 2-A <br /> Fill material from the hillside below the portal will be pushed down, over the fill (of <br /> material from the yard and AML project) which is to be placed at the base of the <br /> hill. To the extent possible, the angle of the slope will be moderated with <br /> terraces, each constructed as a dozer path when the material is pushed down <br /> the hill. <br /> The roadway/ditch (Ditch Segment A) which presently extends down from the <br /> west toward the yard will serve as a ditch below the fill area, continuing on <br /> 3 <br /> 07114193 <br />