IDENTIFIERS

Current Taxon Name (Soil Name): Devilscreek

OSD

Series Extent

User Site ID: S1982CA605REDW009

User Pedon ID: S10CA023015

Vegetation Plot ID: S1982CA605REDW009

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 10N0686

NCSS Pedon Lab Data NASIS Record ID - 43154

Print Date: 3/2/2025

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: 41.1886711

Std. Longitude: -124.0236816

Datum: WGS84

Township: 9N

Range: 1E

Section: 11

PLSS Details: northeast corner of the southeast quarter, northeast quarter

Location Description: Redwood National Park, Humboldt County, California; located approximately 22 kilometers southeast of the town of Orick, 76 meters due east of G-6 Road bridge over Tom McDonald Creek.

Map Unit: 545—Devilscreek-Panthercreek-Coppercreek complex, 30 to 50 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4—California Coastal Redwood Belt

Non-MLRA Soil Survey Area: CA605—Humboldt and Del Norte Area, California

7.5 Minute USGS Quad: 41124-B1—Rodgers Peak, California

PEDON

Describers Name: Jim Popenoe & Jack Lewis

Current Taxonomic Class: Fine-loamy, mixed, semiactive, isomesic Oxyaquic Dystrudepts

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 15

Correlated Information:

Soil Name - Devilscreek

PSC - 25 to 100 cm.

Classificaton Date - 4/12/2010

Soil Taxonomic Edition - eighth edition

Moisture Class - udic

Moisture Subclass - oxyaquic

Sampled As Information:

Soil Name - Devilscreek

Taxonomic Class - Fine-loamy, mixed, semiactive, isomesic Oxyaquic D

Taxon Kind - series

Classificaton Date - 7/22/1982

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: debris flow deposits derived from schist

Landscape: mountains, mountains

Landform: earthflow on mountain slope

Geomorphic Component Mountains: mountainflank, lower third

Hill Slope Profile: backslope

Slope Complexity: complex

Slope Shape Across: linear

Slope Shape Down: linear

Runoff: medium

Drainage Class: moderately well

Flooding: none flooding

Ponding: none ponding

Bedrock: schist, unspecified

Geology: Redwood Creek Schist member of the Franciscan Formation formation.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 7/22/1982 (actual site observation date)

Air Photo ID: 5-15

Surface Water Kind: none observed

Plant Association Name: Redwood Forest

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

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
LIDE3 VAOV2 SESE3 TSHE CORNU RHODO GASH VAPA RUSP MANE2 POMU BLSP ZINGI VAPL TOME ADPE	Lithocarpus densiflorus Vaccinium ovatum Sequoia sempervirens Tsuga heterophylla Cornus Rhododendron Gaultheria shallon Vaccinium parvifolium Rubus spectabilis Mahonia nervosa Polystichum munitum Blechnum spicant Zingiber Vancouveria planipetala Tolmiea menziesii Adiantum pedatum	tanoak California huckleberry redwood western hemlock dogwood rhododendron salal red huckleberry salmonberry Cascade barberry western swordfern deer fern ginger redwood insideout flower youth on age northern maidenhair	— — — — — — — — — — — — — — — —	— — — — — — — — — — — — — — — —	— — — — — — — — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon cambic horizon aquic conditions	0—15 15—75 75—171	—15— —60— —96—

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
68	—	—	152	—	20	2150	—	285	12	14	9	—	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches); slightly decomposed plant material; 0.5 very fine roots and 0.5 fine roots; fragments; noneffervescent.; moist when described; observed in pit, small

A—3 to 15 centimeters (1.2 to 5.9 inches); dark yellowish brown (10YR 4/6) broken face, light yellowish brown (10YR 6/4) broken face, dry; gravelly loam; 32 percent clay; weak medium subangular blocky, and weak medium granular structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 10.0 very fine roots and 10.0 fine roots; 10.0 very fine tubular and 4.0 fine irregular and 10.0 fine tubular pores; 33 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.4, pH meter; gradual wavy boundary. Lab sample # 10N03139; moist when described; observed in pit, small

BA—15 to 35 centimeters (5.9 to 13.8 inches); yellowish brown (10YR 5/8) broken face, light yellowish brown (10YR 6/4) broken face, dry; clay loam; 31 percent clay; moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 4.0 very fine roots and 4.0 medium roots and 4.0 fine roots and 0.5 coarse roots; 4.0 very fine tubular and 4.0 fine tubular pores; 6 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.4, pH meter; gradual wavy boundary. Lab sample # 10N03140; moist when described; observed in pit, small

Bw1—35 to 54 centimeters (13.8 to 21.3 inches); strong brown (7.5YR 5/6) broken face, brownish yellow (10YR 6/6) broken face, dry; clay loam; 31 percent clay; moderate very coarse subangular blocky, and moderate coarse subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 4.0 very fine roots and 4.0 medium roots and 4.0 fine roots and 0.5 coarse roots; 4.0 very fine tubular and 4.0 medium tubular and 4.0 fine tubular pores; 6 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.5, pH meter; gradual wavy boundary. Lab sample # 10N03141; moist when described; observed in pit, small

Bw2—54 to 75 centimeters (21.3 to 29.5 inches); yellowish brown (10YR 5/8) broken face, yellowish brown (10YR 5/6) broken face, dry; cobbly clay loam; 29 percent clay; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots and 0.5 coarse roots; 0.5 very fine tubular and 0.5 fine tubular pores; 10 percent by volume moderately coherent cemented 75-163-250 millimeter schist, unspecified fragments and 12 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.2, pH meter; gradual smooth boundary. Lab sample # 10N03142; moist when described; observed in pit, small

Bg1—75 to 95 centimeters (29.5 to 37.4 inches); light olive brown (2.5Y 5/4) broken face, light gray (2.5Y 7/2) broken face, dry; very gravelly clay loam; 27 percent clay; structureless massive; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 0.5 fine roots; 0.5 very fine tubular and 0.5 fine tubular pores; 10 percent medium prominent yellowish brown (10YR 5/8), moist, and brownish yellow (10YR 6/6), dry, masses of oxidized iron in matrix and 90 percent light olive brown (2.5Y 5/4), moist, and light gray (2.5Y 7/2), dry, reduced matrix in matrix; 10 percent by volume moderately coherent cemented 75-163-250 millimeter schist, unspecified fragments and 40 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.2, pH meter; clear wavy boundary. Lab sample # 10N03143; moist when described; observed in pit, small

Bg2—95 to 171 centimeters (37.4 to 67.3 inches); variegated olive (5Y 5/3) broken face, gray (5Y 5/1) broken face and olive (5Y 5/3) broken face, dry; very gravelly loam; 26 percent clay; structureless massive; slightly hard, friable, slightly sticky, slightly plastic; moderate permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots and 0.5 coarse roots; 0.5 very fine tubular pores; 10 percent medium prominent strong brown (7.5YR 5/6), dry, and strong brown (7.5YR 5/8), moist, masses of oxidized iron in matrix and 90 percent light gray (5Y 7/1), dry, and olive (5Y 5/3), moist, and gray (5Y 6/1), moist, reduced matrix in matrix; 10 percent by volume moderately coherent cemented 75-163-250 millimeter schist, unspecified fragments and 38 percent by volume moderately coherent cemented 2-38-75 millimeter schist, unspecified fragments; noneffervescent; strongly acid, pH 5.1, pH meter. Lab sample # 10N03144; moist when described; observed in pit, small