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EXHIBIT I—Soils Information <br /> Soils at the Koskie site are described on the NRCS Web Soil Survey documents, attached. <br /> Soils at the Koskie site include gravelly and loamy alluviums(Ustollic Calciorthids and Aridic Argiustolls) <br /> associated with the terrace benches of Lone Tree Creek. <br /> The site contains approximately 33 acres of Cascajo gravelly sandy loam(Unit 20),25 acres of Haverson loam <br /> (Unit 29),103 acres of Nunn loam(Unit 40), and 3 acres of Platner loam(Unit 54). <br /> The Cascajo gravelly sandy loam is excessively drained with slight potential for water erosion and a rating of 5 for <br /> wind erosion potential. Wind erosion potential is rated on a scale of 1 to 8, 1 being most susceptible to wind <br /> erosion. The Cascajo soils are suitable for rangeland pasture where livestock are managed to prevent overgrazing. <br /> The Haverson loam is well drained with slight potential for water erosion and a rating of 5 for wind erosion <br /> potential. Wind erosion potential is rated on a scale of 1 to 8, 1 being most susceptible to wind erosion. The <br /> Haverson soils are suitable for non-irrigated crop land and rangeland pasture where livestock are managed to <br /> prevent overgrazing. The main crop in the Haverson soils is winter wheat. Minimal disturbance is planned in the <br /> area of Haverson loam on the Koskie site. <br /> The Nunn loam is well drained with slight to moderate potential for water erosion and a rating of 5 for wind erosion <br /> potential. Wind erosion potential is rated on a scale of 1 to 8, 1 being most susceptible to wind erosion. The Nunn <br /> soils are suitable for non-irrigated cropland and rangeland pasture where livestock are managed to prevent <br /> overgrazing. The main crop grown in the Nunn soils is winter wheat. Low annual precipitation is the main <br /> limitation to the crops. <br /> The Platner loam is well drained with a slight potential for water erosion and a rating of 5 for wind erosion <br /> potential. Wind erosion potential is rated on a scale of 1 to 8, 1 being most susceptible to wind erosion. Winter <br /> Wheat and sorghum(sudangrass)are well suited crops for Platner loam soils. Low annual precipitation is the main <br /> limitation for crops.No disturbance is planned in the small area of Platner loam on the Koskie site. <br /> The NRCS Web Soil Survey indicates the fo lowing potentials for the soils on site: <br /> Soil Type Potential as a Gravel Source Potential as a Sand Source <br /> 20—Cascajo gravelly sandy loam Fair Fair <br /> 29—Haverson loam Poor Fair <br /> 40—Nunn loam Poor Poor <br /> 54—Platner loam Poor Fair <br /> Although the Web Soil Survey does not indicate that these are probable soils for sand and gravel deposits, Weld <br /> County's experience at the current Koskie mine site(included within the limits of this permit application)is that <br /> there are sufficient gravel deposits that provide suitable road base material.No mining is planned in the area of the <br /> Platner loam and minimal disturbance is planned in the area of Haverson loam. <br /> Topsoil at the Koskie site is sparse and very thin,typically less than 3 inches thick for the Cascajo soils and <br /> typically less than 6 inches thick for the Nunn soils. <br /> C:\Users\hbalzano\Desktop\Koskie\Koskie Amendment Application Exhibits 04-29-20.doc <br /> 4/29/2020 <br />