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• Soils Information Exhibit I <br />A general soils report was conducted by the NRCS in 2004. Soil thicknesses are based on site <br />observations and the NRCS soil survey. Topsoil and overburden thicknesses range between 4 and 8 <br />feet. Generally, the topsoil and overburden are thin on the northwest corner of the property and get <br />thicker towards the southeast, where the topsoil and overburden are the thickest. Approximate soil <br />boundaries can be seen on Map C-1B. Soil descriptions for all of the soil types described below can be <br />found in Appendix A. Good topsoil for salvage purposes and reclamation generally averages 12" to <br />18" in thickness. Since much of the topsoil will not be needed for reclamation due to the creation of the <br />lake, only the upper horizon of the soil should be taken and used for reclamation, since it can be placed <br />in full thickness on those areas above the lake. <br />Four NRCS soil mapping units occur within the general permit area and surrounding area. Note that <br />the first two are categorized in one description. They are listed below: <br />• 1) Borollic Calciorthids-Gruben complex, mapping unit 11, occurs on slopes between 6 to 50 percent <br />grade. The typical soil profile consists of 11 inches of loam, 4 inches of gravelly loam, 8 inches of <br />very gravelly loam, and 37 inches of very cobbly sandy loam. The taxonomic classification is <br />Borollic Calciorthids and loamy-skeletal, mixed typic calciborollis. Borollic Calciorthids-Gruben <br />occurs in a very small amount in the southwest corner of the permit area. <br />2) Redrob Loam, mapping unit 71, occurs on slopes between 0 to 2 percent grade. The typical soil <br />profile consists of 17 inches of loam, 18 inches of stony loam to loamy sand, and 25 inches of very <br />cobbly sand. The taxonomic classification is fine-loamy over sandy or sandy-skeletal, mixed <br />(calcareous), frigid Fluvaquentic Haplaquolls. Redrob Loam accounts for approximately 1/3 of the <br />permit area and is primarily in the Northeast corner. <br />3) Tisworth fine sandy loam, mapping unit 89, occurs on slopes between 0 to 5 percent grade near <br />water resources. The typical soil profile consists of 4 inches of fine sandy loam, 7 inches of clay <br />loam, and 49 inches of gravelly loam. The taxonomic classification is Fine-loamy, mixed Borollic <br />0 <br />White River City Pit, August 08 I-1