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R~~~I\1~~ <br />oEC z ~ zoos <br />Soils Information Division of Reclamation, Exhibit I <br />Mining and Safety <br />A general soils report was conducted by the NRCS in 2004. Soil thicknesses aze based on site <br />observations and the NRCS soil survey. Topsoil and overburden thicknesses range between 4 <br />and 8 feet. Generally, the topsoil and overburden are thin on the northwest comer of the property <br />and get thicker towazds the southeast, where the topsoil and overburden are the thickest. <br />Approximate soil boundaries can be seen on Map C-1. Soil descriptions for all of the soil types <br />described below can be found in Appendix A. Good topsoil for salvage purposes and reclamation <br />generally averages 12" to 18" in thickness. Since much of the topsoil will not be needed for <br />reclamation due to the creation of the lake, only the upper horizon of the soil should betaken and <br />used for reclamation, since it can be placed in full thickness on those areas above the lake. <br />Four NRCS soil mapping units occur within the general permit area and surrounding azea. Note <br />that the first two aze categorized in one description. They aze listed below: <br />1) Borollic Calciorthids-Gruben complex, mapping unit 11, occurs on slopes between 6 to 50 <br />gercent grade. The typical soil profile consists of 11 inches of loam, 4 inches of gravelly <br />loam, 8 inches of very gravelly loam, and 37 inches of very cobbly sandy loam. The <br />taxonomic classification is Borollic Calciorthids and loamy-skeletal, mixed typic <br />calciborollis. Borollic Calciorthids-Gruben occurs in a very small amount in the southwest <br />corner of the permit azea. <br />2) Redrob Loam, mapping unit 71, occurs on slopes between 0 to 2 percent grade. The typical <br />soil profile consists of 17 inches of loam, 18 inches of stony loam to loamy sand, and 25 <br />inches of very cobbly sand. The taxonomic classification is fine-loamy over sandy or sandy- <br />skeletal, mixed (calcareous), frigid Fluvaquentic Haplaquolls. Redrob Loam accounts for <br />approximately 1/3 of the pern-it area and is primarily in the Northeast comer. <br />3) Tisworth fine sandy loam, mapping unit 89, occurs on slopes between 0 to 5 percent grade <br />neaz water resources. The typical soil profile consists of 4 inches of fine sandy loam, 7 inches <br />of clay loam, and 49 inches of gravelly loam. The taxonomic classification is Fine-loamy, <br />White River City Pit December 06 I-1 <br />