2013-06-18_REVISION - M1987164 (9)

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SOILS INFORMATION 1. General Information 1 *:4:111.31V The soil survey performed by the NRCS covers the permit area. The soil mapping is shown on Map C -1. The associated soil types descriptions are enclosed in Appendix 1. An investigation into the soils types in the western expansion area has determined similar conditions as were found in the current pit area. According to the Soil Survey of Routt Area, Colorado (United States Department of Agriculture, Soil Conservation Service), there are the following major soil types in and around the permit area: 1. 7C — Morapos loam, 3 to 12 percent slopes 2. 7E - Morapos loam, 12 to 25 percent slopes 3. 9C - Shemap loam, 3 to 12 percent slopes 4. 102 — Shermap loam, 40 to 65 percent slopes 5. 1 O - Bulkley silty clay, 12 to 25 percent slopes 6. 90A - Apmay sandy clay loam, 0 to 3 percent slopes 7. 91 A - Breezebasin loam, 0 to 3 percent slopes The location of these soil types is illustrated on the attached soils map, and can be seen on Map C -1. Morapos Loam, 3 to 12 percent slopes The Morapos component occupies a large portion of the permit area. Slopes are 3 to 12 percent. This component is on hills. The parent material consists of eolian deposits and/or slope alluvium over residuum weathered from shale. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is well drained. Water movement in the most restrictive layer is moderately low. Available water to a depth of 60 inches is high. Shrink -swell potential is high. This soil is not flooded. It is not ponded. There is no zone of water saturation within a depth of 72 inches. Organic matter content in the surface horizon is about 3 percent. This component is in the R034XY292CO Deep Loam ecological site. Nonirrigated land capability classification is 4e. Irrigated land capability classification is 4e. This soil does not meet hydric criteria. The calcium Hayden Gravel Pit, May 2013 I -1