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HomeMy WebLinkAbout1.15 Soil DescriptionsAppendix A 1 Lot 1 Soil Descriptions 104 - Torriorthents-Camborthids-Rock outcrop complex (6-65% Slopes) Map Unit Setting National map unit symbol Jq4c Elevation 5,000 to 8,500 feet Mean annual precipitation 10 to 15 inches Mean annual air temperature 39 to 46 degrees F Frost -free period 80 to 105 days Farmland classification Not prime farmland Map Unit Composition (approximate)* Torriorthents and similar soils 45% Camborthids and similar soils 20% Rock outcrop 15% Minor components 20% *Estimates are based on observations, descriptions, and transects of the map unit. Torriorthents Description: The Torriorthents component makes up 45% of the map unit. Slopes are 6 to 65%. This component is on ridges, mountains, hills. The parent material consists of colluvium derived from sedimentary rock and/or residuum weathered from sedimentary rock. Depth to a root restrictive layer, bedrock, lithic, is 4 to 30 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 (or restricted depth) is low. Shrink -swell potential is 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 the surface horizon is about 1%. Non -irrigated land capability classification is 7e. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 3%. There are no saline horizons within 30 inches of the soil surface. Setting Landform Mountains, hills, ridge Landform position (two-dimensional) Foot slope, back slope Landform position (three-dimensional) Mountain flank, side slope, base slope Down-slope shape Concave Across -slope shape Concave Parent material Colluvium derived from sedimentary rock and/or residuum weathered from sedimentary rock. Typical Profile H1 (0 to 4 inches) Variable H2 (4 to 30 inches) Gravelly loam H3 (30 to 34 inches) Unweathered bedrock Properties and Qualities Slope 6 to 65% Depth to restrictive feature 4 to 30 inches to lithic bedrock Natural drainage class Well drained Runoff class High Capacity of the most limiting layer to transmit water (kSat) Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate (maximum) 5% Salinity (maximum in profile) Non -saline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile Low (about 3.6 inches) Interpretive Groups Alluvium derived from shale and/or colluvium derived from shale and/or alluvium derived from sandstone and/or colluvium derived from sandstone and/or alluvium derived from basalt and/or colluvium derived from basalt. Typical Profile Land capability classification (irrigated) None specified Land capability classification (non -irrigated) 7e Hydrologic Soil Group C Hydric soil rating No Camborthids Description: The Camborthids component makes up 20% of the map unit. Slopes are 6 to 65%. This component is on ridges, mountains, hills. The parent material consists of alluvium derived from shale and/or colluvium derived from shale and/or alluvium derived from sandstone and/or colluvium derived from sandstone and/or alluvium derived from basalt and/or colluvium derived from basalt. Depth to a root restrictive layer, bedrock, lithic, is 15 to 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 (or restricted depth) is low. 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 1%. Non -irrigated land capability classification is 7e. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 8%. There are no saline horizons within 30 inches of the soil surface. Setting Landform Hills, mountains, ridges Landform position (two-dimensional) Foot slope, back slope Landform position (three-dimensional) Mountain flank, side slope, base slope Down-slope shape Linear Across -slope shape Linear Parent material Alluvium derived from shale and/or colluvium derived from shale and/or alluvium derived from sandstone and/or colluvium derived from sandstone and/or alluvium derived from basalt and/or colluvium derived from basalt. Typical Profile H1 (0 to 4 inches) Variable H2 (4 to 30 inches) Clay loam H3 (30 to 34 inches) Unweathered bedrock Properties and Qualities Slope 6 to 65% Depth to restrictive feature 15 to 60 inches to lithic bedrock Natural drainage class Well drained Runoff class High Capacity of the most limiting layer to transmit water (kSat) Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate (maximum in profile) 10% Gypsum (maximum in profile) 2% Salinity (maximum in profile) Non -saline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water storage in profile Low (about 4.0 inches) Interpretive Groups Land capability classification (irrigated) None specified Land capability classification (non -irrigated) 7e Hydrologic Soil Group C Hydric soil rating No Rock Outcrop Description: Generated brief soil descriptions are created for major soil components. The Rock outcrop is a miscellaneous area. Typical Profile H1 (0 to 60 inches) Unweathered bedrock Properties and Qualities Slope 6 to 65% Depth to restrictive feature 0 inches to lithic bedrock Runoff class Very high Capacity of the most limiting layer to transmit water (kSat) Very low to low (0.00 to 0.00 in/hr) Available water storage in profile Very low (about 0.0 inches) Interpretive Groups Land capability classification (irrigated) None specified Land capability classification (non -irrigated) 8s Hydrologic Soil Group D Hydric soil rating No Other soils Description: Other soils make up 20% of the map unit. These soils do not meet hydric criteria. 95 - Showalter-Morval complex (15-25% slopes) Map Unit Setting National map unit symbol jq7v Elevation 7,000 to 8,500 feet Mean annual precipitation 14 to 16 inches Mean annual air temperature 42 to 44 degrees F Frost -free period 80 to 90 days Farmland classification Not prime farmland Map Unit Composition (approximate)* Very stony loam Showalter and similar soils 45% Morval and similar soils 35% Minor components 20% *Estimates are based on observations, descriptions, and transects of the map unit. Showalter The Showalter component makes up 45% of the map unit. Slopes are 15 to 25%. This component is on alluvial fans, terraces, valley sides. The parent material consists of alluvium derived from basalt. 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 (or restricted depth) is low. 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 3%. This component is in the R048AY303C0 Loamy Slopes ecological site. Non -irrigated land capability classification is 7s. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 8%. Setting Landform Alluvial fans, terraces, valley sides Landform position (three-dimensional) Tread Down-slope shape Linear Across -slope shape Linear Parent material Alluvium derived from basalt. Typical Profile H1 (0 to 8 inches) Very stony loam H2 (8 to 39 inches) Very cobbly clay H3 (39 to 60 inches) Very cobbly clam loam Properties and Qualities Slope 15 to 25% Depth to restrictive feature More than 80 inches Natural drainage class Well drained Runoff class Very high Capacity of the most limiting layer to transmit water (kSat) Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate (maximum) 10% Available water storage in profile Low (about 5.5 inches) Interpretive Groups Alluvial fans Land capability classification (irrigated) None specified Land capability classification (non -irrigated) 7s Hydrologic Soil Group C Ecological site Loamy slopes (R048AY303C0) Other vegetative classification Loamy slopes (null_31) Hydric soil rating No Morval Description: The Morval component makes up 35% of the map unit. Slopes are 15 to 25%. This component is on alluvial fans. The parent material consists of alluvium derived from basalt. 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 water to a depth of 60 inches (or restricted depth) is high. Shrink -swell potential is 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 the surface horizon is about 2%. This component is in the R048AY292C0 Deep Loam ecological site. Non -irrigated land capability classification is 6e. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 20%. There are no saline horizons within 30 inches of the soil surface. Setting Landform Alluvial fans Down-slope shape Linear Across -slope shape Linear Parent material Alluvium derived from basalt. Typical Profile H1 (0 to 7 inches) Loam H2 (7 to 19 inches) Clay loam H3 (19 to 60 inches) Loam Properties and Qualities Slope 15 to 25% Depth to restrictive feature More than 80 inches Natural drainage class Well drained Runoff class Very high Capacity of the most limiting layer to transmit water (kSat) Moderately high (0.20 to 0.60 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate (maximum) 25% Salinity (maximum in profile) Non -saline to slightly saline (0.0 to 4.0 mmhos/cm) Available water storage in profile High (about 9.3 inches) Interpretive Groups Land capability classification (irrigated) None specified Land capability classification (non -irrigated) 6e Hydrologic Soil Group C Ecological site Deep loam (R048AY292C0) Other vegetative classification Deep loam (null_11) Hydric soil rating No Other soils Description: Other soils make up 20% of the map unit. These soils do not meet hydric criteria. 64 - Jerry loam (25-65% slopes) Map Unit Setting National map unit symbol jq6r Elevation 7,500 to 9,500 feet Mean annual precipitation 18 to 20 inches Mean annual air temperature 37 to 40 degrees F Frost -free period 70 to 80 days Farmland classification Not prime farmland Map Unit Composition (approximate)* Jerry and similar soils 85% Minor components 15% *Estimates are based on observations, descriptions, and transects of the map unit. Jerry The Jerry component makes up 85 % of the map unit. Slopes are 25 to 65%. This component is on alluvial fans, hills. The parent material consists of 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 water to a depth of 60 inches (or restricted depth) 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 4%. This component is in the R048AY238C0 Brushy Loam ecological site. Non -irrigated land capability classification is 7e. This soil does not meet hydric criteria. The calcium carbonate equivalent within 40 inches, typically, does not exceed 3%. Setting Landform Alluvial fans, hills Landform position (two-dimensional) Foot slope Landform position (three-dimensional) Base slope Down-slope shape Linear Across -slope shape Linear Parent material Alluvium derived from sandstone and shale. Typical Profile H1 (0 to 11 inches) Loam H2 (11 to 34 inches) Channery clay loam H3 (34 to 60 inches) Very channery clay loam Properties and Qualities Slope 25 to 65% Depth to restrictive feature More than 80 inches Natural drainage class Well drained Runoff class Very high Capacity of the most limiting layer to transmit water (kSat) Moderately high (0.20 to 0.60 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate (maximum) 5% Available water storage in profile Moderate (about 7.8 inches) Interpretive Groups Land capability classification (irrigated) None specified Land capability classification (non-irrigated) 7e Hydrologic Soil Group C Ecological site Loamy slopes (R048AY238C0) Other vegetative classification Brushy loamy (null_4) Hydric soil rating No Other soils Description: Other soils make up 15% of the map unit. These soils do not meet hydric criteria.