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periodically lies between the proposed intake portal location and <br />I the existing fan portal location. In this area, a mud flow or <br />debris flow chute is present, which will likely "run" upon <br />' occasion causing a temporary blockage of the bench and access <br />road area at that location. Due to the low frequency associated <br />with significant events in this chute and the very low level of <br />~ activity on the access road, we do not feel the feature <br />represents a significant safety hazard. It does, however, <br />represent a significant maintenance problem. <br />Crusher Facili~: <br />1 The proposed crusher facility is to be located on an <br />I existing bench, below the bench associated with the existing main <br />entry portal (the crusher will be at the B seam level, some 50 <br />vertical feet below the upper bench). Test Boring No. 4, as <br />indicated on the Test Boring Location Diagram in the Appendix of <br />l this report, is approximately at this location. This particular <br />test boring indicated moderate to high density, colluvial soil <br />extending to a depth in excess of 30 feet. We would anticipate <br />I that this soil would have an allowable bearing capacity for <br />shallow foundations on the order of 6000 psf, with no minimum <br />I dead load requirement. Due to the nature of the soil type at <br />1 this location, we would anticipate only a low to moderate <br />susceptibility to settlement from vibration. The proposed <br />1 crusher site is, however, located in a steeply sloping <br />environment. It is important that adequate confinement of the <br />I scil be provided below foundation level in order to attain the <br />I full allowable bearing. If proposed shallow foundations will <br />14 <br />