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Vanvalkenburg Gmvel Pit <br />Exhibit I <br />Soils Information <br />The Randman series consists of deep, poorly drained soils that formed in noncalcareous onhvash and <br />alluvium. They are underlain by very gravelly sand at a depth of 20 to 40 inches. The soils aze on low <br />terraces and benches between elevations of 7,280 and 9,000 feet. Slopes are 1 [0 4 percent. The mean <br />annual precipitation is 10 to 15 inches, the mean annual air temperature is 36 to 38 degrees F, and the frost- <br />free season is 35 to 45 days. <br />In a representative profile an organic mat of grass roots and fleshy remains of grasses 1 inch thick is on <br />the surface. The surface layer is grayish brown sandy loam about 6 inches thick. The upper 4 inches of the <br />subsoil is grayish brown gravelly heavy sandy loam, and the lower 20 inches is light brownish gray <br />gravelly sandy clay loam. Very gravelly sand is at a depth of about 30 inches. <br />Permeability is moderate above a depth of 30 inches and rapid below a depth of 30 inches. Available <br />water capacity is moderate. These soils are irrigated and aze used mainly for grass hay and pasture. <br />10 <br />