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14. Soil Survey -1996 <br />As the mine expanded to the west, an additional survey was conducted on the area immediately <br />east of 2700 Road and south of BB Road. This is an area of 105.8 acres, which constituted the <br />first amendment expansion of the mine. Most of this area was studied in the 1998 survey, but <br />was re -done in 1996 to higher standards. <br />15. Soil Survey -1998 <br />This survey covered the amendment area west of 2700 Road (441.99 acres), and the area <br />north of BB Road and east of 2700 Road. See Map 2.04.9 -1 for the actual area. The soil test <br />location descriptions are typical and consistent for soil in the area. The Order I survey is a <br />refinement of the "not yet published" Order III soil survey that the NRCS has conducted in the <br />area. Detailed map unit descriptions can be found in Appendix 2.04.9 -9, Soil Map Unit <br />Descriptions. <br />Map unit 98A occurs on alluvial terraces formed along Tuttle Creek. Profiles were described to <br />72 inches. Some areas may have soil deeper than 72 inches and yield a slightly greater amount <br />of salvage material. This unit is considered prime farmland soil as of the 2008 NRCS <br />determination. <br />Map unit 98B occurs on steep mesa side slopes. Hardness of bedrock varies depending on the <br />underlying strata. Coarse fragments range from boulders to cobbles and are residual and <br />colluvial in nature. Valleycity soil has the same physical and chemical properties as those soils <br />similarly named in the survey area. Valleycity is outside the range of characteristics compared <br />to the survey area, in that it occurs in an area of 5 to 8 inches mean annual precipitation. <br />Map unit 98C occurs on mesa summits, ridges and crests. Hardness of bedrock varies <br />depending on the underlying strata. <br />(Revised October 09) 2.04.9 -26 <br />