2010-03-30_PERMIT FILE - M2010019

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Map Unit Description (Brief, Generated)-Archuleta County Area, Colorado tom smith south pit soil description Map Unit Description (Brief, Generated) The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions in this report, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. The Map Unit Description (Brief, Generated) report displays a generated description of the major soils that occur in a map unit. Descriptions of non-soil (miscellaneous areas) and minor map unit components are not included. This description is generated from the underlying soil attribute data. Additional information about the map units described in this report is available in other Soil Data Mart reports, which give properties of the soils and the limitations, capabilities, and potentials for many uses. Also, the narratives that accompany the Soil Data Mart reports define some of the properties included in the map unit descriptions. Report-Map Unit Description (Brief, Generated) Archuleta County Area, Colorado Map Unit: M6-F-Pagosa-Lakehelen complex, 25 to 80 percent slopes Component: Pagosa (50%) The Pagosa component makes up 50 percent of the map unit. Slopes are 25 to 80 percent. This component is on mountain slopes. The parent material consists of slope alluvium derived from sandstone and 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 high. Available waterto a depth of 60 inches is moderate. Shrink-swell potential is moderate. 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 85 percent. This component is in the F036XY922CO Abies Concolor-Pseudotsuga Menziesii/acer- Symphoricarpos Albus/bromus Anomalus-Elymus Glaucus ecological site. Nonirrigated land capability classification is 7e. This soil does not meet hydric criteria. USDA Natural Resources Web Soil Survey 2.0 11/29/2007 '' Conservation Service National Cooperative Soil Survey Page 1 of 2 Page 15