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Shannon County Area, South Dakota (SD613) Map Unit Symbol Map Unit Name Acres in AOI Percen t of AOI K fact or Aa Lohmiller silty clay loam, channeled, 0 to 2 percent slopes 1,232. 7 1.4% 0.43 AvE Anselmo-Valentine complex, 5 to 20 percent slopes 2,362. 3 2.7% 0.2 Ba Badland-Denby-Interior complex, 0 to 90 percent slopes 3,982. 2 4.5% 0.1 Bk Bankard loamy sand, 0 to 3 percent slopes 11.0 0.0% 0.2 Br Badland 4,163. 4 4.7% 0.1 CaF Canyon-Oglala association, 18 to 40 percent slopes 10,460 .2 11.8% 0.32 Cc Canyon-Rock outcrop association, 18 to 40 percent slopes 5,256. 8 5.9% 0.32 Cy Denby silty clay, 0 to 4 percent slopes 648.9 0.7% 0.37 EhF Epping-Kadoka association, 9 to 40 percent slopes 3,266. 0 3.7% 0.43 EkE Epping-Kadoka silt loams, 9 to 18 percent slopes 10,615 .7 12.0% 0.43 Er Epping-Rock outcrop complex, 9 to 40 percent slopes 1,568. 9 1.8% 0.43 GoA Mobridge silt loam, 0 to 3 percent slopes 163.1 0.2% 0.43 Gr Nihill gravelly loam, 2 to 30 percent slopes 890.0 1.0% 0.24 HhA Haverson loam, 0 to 3 percent slopes, rarely flooded 30.5 0.0% HlA Haverson loam, 0 to 3 percent slopes, occasionally flooded 450.8 0.5% 0.28 KaB Kadoka silt loam, 3 to 5 percent slopes 669.9 0.8% 0.43 KaC Kadoka silt loam, 5 to 9 percent slopes 903.3 1.0% 0.43 KbC Kadoka-Epping silt loams, 3 to 9 2,848.3.2% 0.43

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Page 1: wiki.sdstate.eduwiki.sdstate.edu/@api/deki/files/1440/=Appendix_1.docx · Web viewShannon County Area, South Dakota (SD613) Map Unit Symbol . Map Unit Name . Acres in AOI . Percent

Shannon County Area, South Dakota (SD613) Map Unit Symbol Map Unit Name Acres in

AOI Percent of AOI

K factor

Aa Lohmiller silty clay loam, channeled, 0 to 2 percent slopes 1,232.7 1.4% 0.43

AvE Anselmo-Valentine complex, 5 to 20 percent slopes 2,362.3 2.7% 0.2Ba Badland-Denby-Interior complex, 0 to 90 percent slopes 3,982.2 4.5% 0.1Bk Bankard loamy sand, 0 to 3 percent slopes 11.0 0.0% 0.2Br Badland 4,163.4 4.7% 0.1CaF Canyon-Oglala association, 18 to 40 percent slopes 10,460.2 11.8% 0.32

Cc Canyon-Rock outcrop association, 18 to 40 percent slopes 5,256.8 5.9% 0.32

Cy Denby silty clay, 0 to 4 percent slopes 648.9 0.7% 0.37EhF Epping-Kadoka association, 9 to 40 percent slopes 3,266.0 3.7% 0.43EkE Epping-Kadoka silt loams, 9 to 18 percent slopes 10,615.7 12.0% 0.43Er Epping-Rock outcrop complex, 9 to 40 percent slopes 1,568.9 1.8% 0.43GoA Mobridge silt loam, 0 to 3 percent slopes 163.1 0.2% 0.43Gr Nihill gravelly loam, 2 to 30 percent slopes 890.0 1.0% 0.24HhA Haverson loam, 0 to 3 percent slopes, rarely flooded 30.5 0.0%

HlA Haverson loam, 0 to 3 percent slopes, occasionally flooded 450.8 0.5% 0.28

KaB Kadoka silt loam, 3 to 5 percent slopes 669.9 0.8% 0.43KaC Kadoka silt loam, 5 to 9 percent slopes 903.3 1.0% 0.43KbC Kadoka-Epping silt loams, 3 to 9 percent slopes 2,848.2 3.2% 0.43KeA Keith silt loam, 0 to 3 percent slopes 3,477.3 3.9% 0.43KeB Keith silt loam, 3 to 5 percent slopes 1,746.4 2.0% 0.43KhD Keith-Colby silt loams, 9 to 12 percent slopes 5,711.2 6.4% 0.43KhE Keith-Colby silt loams, 12 to 18 percent slopes 919.9 1.0% 0.43KrA Keith-Rosebud silt loams, 0 to 3 percent slopes 32.5 0.0% 0.43KuC Keith-Ulysses silt loams, 5 to 9 percent slopes 1,985.0 2.2% 0.43Lm Interior silt loam, 0 to 3 percent slopes 1,832.8 2.1% 0.43Mm Mosher-Minatare complex, 0 to 6 percent slopes 879.8 1.0% 0.37OcE Oglala-Canyon loams, 9 to 18 percent slopes 11,329.3 12.8% 0.43Os Orella-Shale outcrop complex, 3 to 18 percent slopes 331.5 0.4% RaA Richfield-Altvan silt loams, 0 to 3 percent slopes 601.7 0.7% 0.43RaB Richfield-Altvan silt loams, 3 to 5 percent slopes 597.4 0.7% 0.43RdA Richfield-Dawes silt loams, 0 to 3 percent slopes 701.5 0.8% 0.43ReB Rosebud-Canyon loams, 5 to 9 percent slopes 1,590.4 1.8% 0.37RkC Rosebud-Keith silt loams, 3 to 9 percent slopes 218.1 0.2% 0.37Te Epping-Mitchell silt loams, 9 to 30 percent slopes 410.0 0.5% 0.43TnA Tuthill-Anselmo fine sandy loams, 0 to 3 percent slopes 4.6 0.0% 0.20TnC Tuthill-Anselmo fine sandy loams, 3 to 9 percent slopes 40.2 0.0% 0.20TuA Tuthill-Manter fine sandy loams, 0 to 3 percent slopes 107.7 0.1% TuB Tuthill-Manter fine sandy loams, 3 to 5 percent slopes 94.9 0.1% TuC Tuthill-Manter fine sandy loams, 5 to 9 percent slopes 434.0 0.5% 0.32U020G Badland 184.9 0.2% 0.10

Page 2: wiki.sdstate.eduwiki.sdstate.edu/@api/deki/files/1440/=Appendix_1.docx · Web viewShannon County Area, South Dakota (SD613) Map Unit Symbol . Map Unit Name . Acres in AOI . Percent

Shannon County Area, South Dakota (SD613) Map Unit Symbol Map Unit Name Acres in

AOI Percent of AOI

K factor

U110A Cedarpass silt loam, 0 to 3 percent 4.5 0.0% U110B Cedarpass silt loam, 3 to 6 percent slopes 25.5 0.0%

U192G Epping-Keota-Badland complex, moist, 9 to 50 percent slopes 940.0 1.1% 0.43

U215F Epping, moist-Badland complex, 9 to 40 percent slopes 2.5 0.0% U325B Interior loam, channeled, 0 to 6 percent slopes, flooded 3,646.0 4.1% 0.43

U360F Keota, thick surface-Epping-Badland complex, moist, 9 to 40 percent slopes 39.3 0.0%

U545E Oglala-Canyon, moist loams, 9 to 25 percent 56.5 0.1% Vs Valentine sand, 3 to 30 percent slopes 737.8 0.8% 0.15W Water 65.6 0.1% Ww Wortman-Wanblee silt loams, 0 to 6 percent slopes 349.2 0.4% 0.37

Shannon County Area, South Dakota

CaF—Canyon-Oglala association, 18 to 40 percent slopes

Map Unit Setting

Elevation: 2,950 to 3,940 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature: 43 to 50 degrees F Frost-free period: 135 to 145 days

Map Unit Composition

Canyon and similar soils: 50 percent Oglala and similar soils: 30 percent Minor components: 20 percent

Description of Canyon

Setting

Landform: Ridges Landform position (two-dimensional): Summit, shoulder Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from calcareous sandstone

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Properties and qualities

Slope: 18 to 40 percent Depth to restrictive feature: 6 to 20 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to

0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Very low (about 1.8 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 7e Hydrologic Soil Group: D Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 4 inches: Loam 4 to 10 inches: Loam 10 to 60 inches: Weathered bedrock

Description of Oglala

Setting

Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Parent material: Residuum weathered from sandstone

Properties and qualities

Slope: 18 to 40 percent Depth to restrictive feature: 40 to 60 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high

(0.06 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None

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Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Moderate (about 8.7 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 7 inches: Loam 7 to 48 inches: Very fine sandy loam 48 to 60 inches: Weathered bedrock

Minor Components

Rosebud

Percent of map unit: 11 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Rock outcrop

Percent of map unit: 4 percent Ecological site: Non-site (R064XY999NE) Other vegetative classification: Not suited (G064XY000NE)

Ulysses

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

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Colby

Percent of map unit: 2 percent Landform: Ridges Landform position (two-dimensional): Summit, shoulder Down-slope shape: Convex Across-slope shape: Convex Ecological site: Thin Upland (R064XY037NE) Other vegetative classification: Not suited (G064XY000NE)

Mobridge

Percent of map unit: 1 percent Landform: Drainageways Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Shannon County Area, South Dakota

Cc—Canyon-Rock outcrop association, 18 to 40 percent slopes

Map Unit Setting

Elevation: 2,950 to 3,940 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature: 43 to 50 degrees F Frost-free period: 135 to 145 days

Map Unit Composition

Canyon and similar soils: 45 percent Rock outcrop, sandstone: 25 percent Minor components: 30 percent

Description of Canyon

Setting

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Landform: Ridges Landform position (two-dimensional): Shoulder, summit Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from calcareous sandstone

Properties and qualities

Slope: 18 to 40 percent Depth to restrictive feature: 6 to 20 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to

0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Very low (about 1.8 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 7e Hydrologic Soil Group: D Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 4 inches: Loam 4 to 10 inches: Loam 10 to 60 inches: Weathered bedrock

Description of Rock Outcrop, Sandstone

Properties and qualities

Slope: 18 to 40 percent Depth to restrictive feature: 0 to 1 inches to paralithic bedrock Drainage class: Excessively drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.20 to 1.98 in/hr) Calcium carbonate, maximum content: 15 percent Gypsum, maximum content: 1 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Very low (about 0.0 inches)

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Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 8s Hydrologic Soil Group: D Ecological site: Non-site (R064XY999NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 60 inches: Weathered bedrock

Minor Components

Oglala

Percent of map unit: 15 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Not suited (G064XY000NE)

Mobridge

Percent of map unit: 3 percent Landform: Swales Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Keith

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Lohmiller, channeled

Percent of map unit: 3 percent

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Landform: Flood plains Landform position (two-dimensional): Toeslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy Overflow (R064XY026NE) Other vegetative classification: Overflow (G064XY500NE)

Rosebud

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Colby

Percent of map unit: 3 percent Landform: Ridges Landform position (two-dimensional): Summit, shoulder Down-slope shape: Convex Across-slope shape: Convex Ecological site: Thin Upland (R064XY037NE) Other vegetative classification: Not suited (G064XY000NE)

Shannon County Area, South Dakota

EkE—Epping-Kadoka silt loams, 9 to 18 percent slopes

Map Unit Setting

Elevation: 2,950 to 3,940 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature: 43 to 50 degrees F Frost-free period: 135 to 145 days

Map Unit Composition

Epping and similar soils: 50 percent

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Kadoka and similar soils: 40 percent Minor components: 10 percent

Description of Epping

Setting

Landform: Hills Landform position (two-dimensional): Shoulder, summit Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from siltstone

Properties and qualities

Slope: 9 to 15 percent Depth to restrictive feature: 10 to 20 inches to paralithic bedrock Drainage class: Well drained 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 content: 10 percent Available water capacity: Very low (about 1.2 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 6e Hydrologic Soil Group: D Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 2 inches: Silt loam 2 to 6 inches: Silt loam 6 to 60 inches: Weathered bedrock

Description of Kadoka

Setting

Landform: Hills Landform position (two-dimensional): Backslope, summit Down-slope shape: Linear

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Across-slope shape: Linear Parent material: Residuum weathered from siltstone

Properties and qualities

Slope: 9 to 15 percent Depth to restrictive feature: 20 to 40 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to

moderately high (0.06 to 0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 15 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Low (about 5.6 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Typical profile

0 to 3 inches: Silt loam 3 to 8 inches: Silty clay loam 8 to 30 inches: Silt loam 30 to 60 inches: Weathered bedrock

Minor Components

Keith

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Ulysses

Percent of map unit: 2 percent

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Landform: Ridges Landform position (two-dimensional): Summit Down-slope shape: Convex Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Mobridge

Percent of map unit: 2 percent Landform: Drainageways Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Colby

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Shoulder, summit Down-slope shape: Convex Across-slope shape: Convex Ecological site: Thin Upland (R064XY037NE) Other vegetative classification: Not suited (G064XY000NE)

Wortman

Percent of map unit: 1 percent Landform: Hills Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Claypan (R064XY044NE) Other vegetative classification: Claypan (G064XY800NE)

Wanblee

Percent of map unit: 1 percent Landform: Hills Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Thin Claypan (R064XY046NE) Other vegetative classification: Not suited (G064XY000NE)

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Shannon County Area, South Dakota

KhD—Keith-Colby silt loams, 9 to 12 percent slopes

Map Unit Setting

Elevation: 2,950 to 3,940 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature: 43 to 50 degrees F Frost-free period: 135 to 145 days

Map Unit Composition

Keith and similar soils: 50 percent Colby and similar soils: 35 percent Minor components: 15 percent

Description of Keith

Setting

Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Parent material: Loess

Properties and qualities

Slope: 9 to 11 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high

(0.06 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Available water capacity: High (about 10.5 inches)

Interpretive groups

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Farmland classification: Not prime farmland Land capability (nonirrigated): 4e Hydrologic Soil Group: B Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Typical profile

0 to 7 inches: Silt loam 7 to 28 inches: Silty clay loam 28 to 60 inches: Silty clay loam

Description of Colby

Setting

Landform: Hills Landform position (two-dimensional): Shoulder, summit Down-slope shape: Convex Across-slope shape: Convex Parent material: Calcareous loess

Properties and qualities

Slope: 9 to 12 percent Depth to restrictive feature: More than 80 inches Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.57 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 45 percent Available water capacity: Very high (about 12.0 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: Thin Upland (R064XY037NE) Other vegetative classification: Limy Upland (G064XY400NE)

Typical profile

0 to 4 inches: Silt loam 4 to 60 inches: Silt loam

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Minor Components

Canyon

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Shoulder Down-slope shape: Convex Across-slope shape: Convex Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Mobridge

Percent of map unit: 3 percent Landform: Swales Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Epping

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Shoulder Down-slope shape: Convex Across-slope shape: Convex Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Oglala

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Shoulder Down-slope shape: Convex Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Not suited (G064XY000NE)

Ulysses

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Backslope

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Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Kadoka

Percent of map unit: 2 percent Landform: Hills Landform position (two-dimensional): Shoulder Down-slope shape: Convex Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Shannon County Area, South Dakota

OcE—Oglala-Canyon loams, 9 to 18 percent slopes

Map Unit Setting

Elevation: 2,950 to 3,940 feet Mean annual precipitation: 13 to 19 inches Mean annual air temperature: 43 to 50 degrees F Frost-free period: 135 to 145 days

Map Unit Composition

Oglala and similar soils: 50 percent Canyon and similar soils: 35 percent Minor components: 15 percent

Description of Oglala

Setting

Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Parent material: Residuum weathered from sandstone

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Properties and qualities

Slope: 15 to 18 percent Depth to restrictive feature: 40 to 60 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately low to high

(0.06 to 1.98 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Moderate (about 8.7 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 6e Hydrologic Soil Group: B Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 7 inches: Loam 7 to 48 inches: Very fine sandy loam 48 to 60 inches: Weathered bedrock

Description of Canyon

Setting

Landform: Hills Landform position (two-dimensional): Shoulder, summit Down-slope shape: Convex Across-slope shape: Convex Parent material: Residuum weathered from calcareous sandstone

Properties and qualities

Slope: 9 to 15 percent Depth to restrictive feature: 6 to 20 inches to paralithic bedrock Drainage class: Well drained Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to

0.57 in/hr) Depth to water table: More than 80 inches Frequency of flooding: None

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Frequency of ponding: None Calcium carbonate, maximum content: 10 percent Maximum salinity: Nonsaline (0.0 to 2.0 mmhos/cm) Available water capacity: Very low (about 1.8 inches)

Interpretive groups

Farmland classification: Not prime farmland Land capability (nonirrigated): 6e Hydrologic Soil Group: D Ecological site: Shallow (R064XY040NE) Other vegetative classification: Not suited (G064XY000NE)

Typical profile

0 to 4 inches: Loam 4 to 10 inches: Loam 10 to 60 inches: Weathered bedrock

Minor Components

Ulysses

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Summit Down-slope shape: Convex Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Mobridge

Percent of map unit: 3 percent Landform: Swales Landform position (two-dimensional): Footslope Down-slope shape: Concave Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Rosebud

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear

Page 18: wiki.sdstate.eduwiki.sdstate.edu/@api/deki/files/1440/=Appendix_1.docx · Web viewShannon County Area, South Dakota (SD613) Map Unit Symbol . Map Unit Name . Acres in AOI . Percent

Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Keith

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Backslope Down-slope shape: Linear Across-slope shape: Linear Ecological site: Loamy 17-20 P.Z. (R064XY036NE) Other vegetative classification: Loam (G064XY100NE)

Colby

Percent of map unit: 3 percent Landform: Hills Landform position (two-dimensional): Summit Down-slope shape: Convex Across-slope shape: Convex Ecological site: Thin Upland (R064XY037NE) Other vegetative classification: Not suited (G064XY000NE)