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EXHIBIT C.H.1 <br />Map Unit Description <br />Rio Grande County Area, Colorado <br />[Minor map unit components are excluded from this report] <br />Map unit: Dn - Dunul cobbly sandy loam ' <br />Component: Dunul (100% <br />The Dunul component makes up, 100 percent of the map unit. Slopes are 0 to 1 percent. This component is on alluvial fans. The parent' <br />material consists of cobbly alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is excessively <br />drained. Water movement in the most restrictive layer is, high. Available water to a depth of 60 inches is low. Shrink-swell potential is <br />low. 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 <br />the surface horizon is about. I percent. This component is in the"R051XY281 CO Mountain Outwash ecological site. Nonirrigated land <br />capability classification is 7s. Irrigated land capability classification, is 4s. This soil does not meet, hydric criteria. The calcium carbonate <br />equivalent within 40 inches, typically, does not exceed 6 percent. <br />Map unit: No - Norte gravelly sandy loam <br />Component: Norte (100% <br />The Norte component makes up 100 percent of the map unit. Slopes are 0 to 1 percent. This component is on alluvial fans. The parent <br />material consists of gravelly alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is moderately <br />well drained Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches is low. <br />Shrink-swell potential is low. This soil is not flooded. It is not ponded.: A seasonal zone of water saturation is at 39 inches during May, <br />June, July, August, September.:Organic matter content in the sun`ace horizon is about 1 percent. This component is in the <br />R051XY281CO Mountain Outwash ecological site. Nonirrigated land capability classification is 7s. Irrigated land capability classification, <br />is 3s. This soil does not meet hydric criteria. The calcium carbonate; equivalent within 40 inches, typically, does not exceed 8 percent. <br />The soil has a slightly saline horizon within 30 inches of the-soil surface. <br />Map unit: Nr- Norte-Dunul complex <br />Component: Dunul (40% <br />The Dunul component makes up 40 percent of the map unit. Slopes are 0 to 1 percent. The parent material consists of cobb/y alluvium. <br />Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is excessively drained. Water movement in the <br />most restrictive layer is moderately high. Available water to a.depth of 60 inches is very low. Shrink-swell potential is low. This soil is not. <br />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 <br />is.about 1 percent. This component is in the R051XY281CO Mountain Outwash ecological site. Nonirrigated land capability classification <br />is 7s. Irrigated land capability classification is 4s: This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 <br />inches, typically, does not exceed 8 percent: <br />Component: Norte (40%) <br />The Norte component makes up 40 percent of the map unit. Slopes are 0 to 1 percent. This component is on alluvial fans. The parent <br />material consists of gravelly alluvium. Depth to a root restrictive layer is greater than 60 inches. The natural drainage class is moderately <br />well drained. Water movement in the most restrictive layer is moderately high. Available water to a depth of 60 inches is low. <br />Shrink-swell potential is low. This soil is not flooded. It is not ponded. A seasonal zone of water saturation is at 39 inches during May, <br />June, July, August, September. Organic matter content in the surface horizon is about 1 percent. This component is in the <br />R05IXY281 CO Mountain Outwash ecological site. Nonirrigated land capability classification is 7s. Irrigated land capability classification <br />is 3s. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 8 percent. <br />The soil has a slightly saline horizon within 30 inches of the soil surface. <br />USDA Natural Resources <br />Survey Area Version: 5 <br />Conservation Service Survey Area Version Date: 01/31/2008 <br />Page 1 of 2