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4-4 <br />of the area, by Munger Canyon and by three considerably wider <br />• valleys in the southern part of the area. It is proposed <br />to use one of these valleys for the disposal of coal refuse. <br />On the west side of the East Salt Creek valley, there are <br />two unnamed valleys located approximately across from McClane <br />Canyon and Munger Canyon, and several wide but shorter side <br />valleys. <br />All side valleys, as shown on Figure 4.1-1S, are filled with <br />soils that can be classified as alluvial deposits. There <br />are, however, significant differences in the character of <br />alluvial deposits between individual valleys. <br />The alluvial deposits in McClane Canyon extend a distance <br />of approximately a quarter of a mile from the confluence. <br />The alluvium of the opposite valley extends a much greater <br />distance. The alluvium in Munger Canyon can be followed for <br />more than one mile from the confluence; alluvial deposits <br />in the opposite valley are as extensive. Both deposits are <br />distinctly higher than the alluvial deposits of the East Salt <br />Creek. The outwash of both these canyons covers the alluvial <br />deposits of the East Salt Creek and the valley surface is <br />distinctly higher at the confluence than the main valley <br />alluvium above and below the confluence. <br />The four side valleys in the northern part of the area exhibit <br />ephemeral channels. The character of the alluvial deposits <br />differs from East Salt Creek deposits. The widths of the <br />deposits are limited and the borders are frequently covered <br />with colluvial soils and alluvial fans descending from deep <br />erosional gullies which dissect the valley sides. <br />The alluvial deposits of the side valleys in the southern <br />part of the study area are much wider and they have a character <br />very similar to the alluvial deposits of the East Salt Creek. <br />There is no appreciable difference in the surface elevation <br />