IDENTIFIERS

  • Current Taxon Name (Soil Name): Hopdraw, moderately deep
  • OSD
  • Series Extent
  • User Site ID: S08SD081-010
  • User Pedon ID: S08SD081-010
  • Lab Information:
  • Certified Lab Pedon Description - no
  • Print Date: 12/6/2025

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 44.4378889
  • Std. Longitude: -103.9062778
  • Datum: WGS84
  • Township: T.6N.
  • Range: R.2E.
  • Section: 32
  • PLSS Details: About 900 feet east and 2,490 feet north of the southwest corner
  • Location Description: Pedon site is about 6 miles SW of Spearfish SD; Tinton Road to Aspen Hills Drive, about 0.5 miles on Aspen Hills to FS trail road (to left), then about 0.25 miles west on trail.
  • Map Unit: 20E—Citadel-Larkson-Hopdraw, moderately deep complex, 10 to 40 percent slopes
  • Non-MLRA Soil Survey Area: SD081—Lawrence County, South Dakota

    • PEDON

  • Describers Name: Dan Brady, Jim Westerman
  • Current Taxonomic Class: Mixed, frigid Typic Udipsamments
  • Current Taxon Kind: taxadjunct
  • Pedon Type: within range of map unit
  • Pedon Purpose: full pedon description
  • Pedon Record Orgin: NASIS
  • Sampled As Information:
  • Soil Name - Hopdraw, moderately deep
  • Taxonomic Class - Mixed, frigid Typic Udipsamments
  • PSC - 25 to 75 cm.
  • Classificaton Date - 10/9/2008
  • Soil Taxonomic Edition - tenth edition
  • Moisture Class - udic
  • Moisture SUBClass - typic
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Landscape: mountains
  • Landform: mountain slope
  • Geomorphic Component Mountains: mountainflank
  • Hill Slope Profile: backslope
  • Slope Position: upper third
  • Slope Complexity: complex
  • Slope Shape Across: linear
  • Slope Shape Down: linear
  • Runoff: low
  • Drainage Class: somewhat excessively
  • Flooding: none flooding
  • Ponding: none ponding
  • Bedrock: weakly coherent moderate weathered sandstone, glauconitic at 75cm with 100 to <200
  • Geology: Noncalcareous Sandstone member of the Minnelusa formation in the Sedimentary group.
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 10/9/2008 (actual site observation date)
  • Air Photo ID: 27
  • Surface Water Kind: none observed
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - tree cover
  • Site Obs. Cover Kind 2 - conifers
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
  • Current Weather - overcast
  • Current Air Temp - 6
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    A

    AC

    C

    Cr

    3

    9

    25

    75

    9

    25

    75

    122

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    A

    AC

    C

    Cr

    3

    9

    25

    75

    9

    25

    75

    122

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    A

    AC

    C

    Cr

    3

    9

    25

    75

    9

    25

    75

    122

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    Pedon Restrictions
    Kind Hardness Restriction Depth L-H Restriction Thickness L-RV-H
    cm

    bedrock, paralithic

    bedrock, lithic

    weakly coherent

    very strongly coherent

    75 - 122

    122 - 200

    0 - 47 - 70

    - 78 -

    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    16

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    1524

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    340

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    Oe—0 to 3 centimeters (0.0 to 1.2 inches); moderately decomposed plant material; fragments; abrupt wavy boundary.; slightly dry when described; observed in pit, large or quarry
    A—3 to 9 centimeters (1.2 to 3.5 inches); very dark grayish brown (10YR 3/2) crushed, dark grayish brown (10YR 4/2) crushed, dry; paragravelly loamy fine sand; 8 percent clay; weak fine subangular blocky parts to weak fine granular structure; soft, very friable, noncoherent, nonsticky, nonplastic; moderately rapid permeability; low excavation difficulty; 2.0 very fine roots throughout and 0.5 medium roots throughout and 4.0 fine roots throughout and 0.5 coarse roots throughout; 5.0 very fine and fine high-continuity interstitial pores; 7 percent by volume nonflat subrounded strongly coherent cemented 5-15-20 millimeter sandstone, glauconitic fragments and 8 percent by volume nonflat subangular strongly coherent cemented 5-15-20 millimeter sandstone, glauconitic fragments; noneffervescent, by hcl, unspecified; clear smooth boundary.; slightly moist when described; observed in pit, large or quarry
    AC—9 to 25 centimeters (3.5 to 9.8 inches); brown (10YR 5/3) crushed, pale brown (10YR 6/3) crushed, dry; very paragravelly fine sand; 7 percent clay; weak fine and medium subangular blocky structure; soft, very friable, noncoherent, nonsticky, nonplastic; rapid permeability; moderate excavation difficulty; 1.5 very fine roots throughout and 1.5 medium roots throughout and 0.5 fine roots throughout and 1.0 coarse roots throughout; 5.0 very fine and fine high-continuity interstitial pores; 4 percent by volume nonflat subangular very strongly coherent cemented 5-40-75 millimeter sandstone, calcareous fragments and 4 percent by volume nonflat subangular very strongly coherent cemented 5-35-75 millimeter sandstone, glauconitic fragments and 5 percent by volume nonflat subangular moderately coherent cemented 75-180-250 millimeter sandstone, glauconitic fragments and 22 percent by volume nonflat subangular moderately coherent cemented 5-35-75 millimeter sandstone, glauconitic fragments; noneffervescent, by hcl, unspecified; clear wavy boundary.; slightly moist when described; observed in pit, large or quarry
    C—25 to 75 centimeters (9.8 to 29.5 inches); light yellowish brown (10YR 6/4) crushed, very pale brown (10YR 8/4) crushed, dry; extremely paracobbly fine sand; 6 percent clay; massive parts to single grain; loose, very friable, noncoherent, nonsticky, nonplastic; rapid permeability; high excavation difficulty; 1.0 very fine roots around fragments and 1.0 medium roots around fragments and 1.0 fine roots around fragments; 0.4 very fine and fine low-continuity interstitial pores; 2 percent by volume nonflat subangular very strongly coherent cemented 380-520-600 millimeter sandstone, glauconitic fragments and 4 percent by volume nonflat subangular very strongly coherent cemented 5-40-75 millimeter sandstone, calcareous fragments and 6 percent by volume nonflat subangular very strongly coherent cemented 5-35-75 millimeter sandstone, glauconitic fragments and 8 percent by volume nonflat subangular strongly coherent cemented 75-180-250 millimeter sandstone, glauconitic fragments and 22 percent by volume nonflat subangular moderately coherent cemented 5-35-75 millimeter sandstone, glauconitic fragments and 32 percent by volume nonflat subangular moderately coherent cemented 75-180-250 millimeter sandstone, glauconitic fragments; noneffervescent, by hcl, unspecified; gradual irregular boundary.; slightly moist when described; observed in pit, large or quarry
    Cr—75 to 122 centimeters (29.5 to 48.0 inches); light yellowish brown (10YR 6/4) exterior, very pale brown (10YR 8/4) exterior, dry; bedrock; massive; silica present; very high excavation difficulty; 0.5 very fine roots in cracks and 0.5 medium roots in cracks and 0.5 fine roots in cracks; 20 percent prominent very dark grayish brown (10YR 3/2), moist, organic stains on bedrock; fragments; noneffervescent, by hcl, unspecified; gradual irregular boundary.; slightly moist when described; observed in pit, large or quarry. continuous - phpvsfiid 432300; continuous - phpvsfiid 432300
    R—122 to 200 centimeters (48.0 to 78.7 inches); bedrock; silica present; 10 percent prominent very dark grayish brown (10YR 3/2), moist, organic stains on bedrock; fragments.; observed in pit, large or quarry. patchy - phpvsfiid 432301; patchy - phpvsfiid 432301