IDENTIFIERS

Current Taxon Name (Soil Name): Tectah

OSD

Series Extent

User Site ID: S1982CA605REDW026

User Pedon ID: S10CA023005

Vegetation Plot ID: S1982CA605REDW026

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 10N0676

NCSS Pedon Lab Data NASIS Record ID - 43144

Print Date: 12/11/2024

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: 41.2339134

Std. Longitude: -123.9915085

Datum: WGS84

Township: 10N

Range: 2E

Section: 19

PLSS Details: southwest quarter, southeast quarter

Location Description: Redwood National Park, Humboldt County, California; located approximately 14 kilometers southeast of the town of Orick, 152 meters southeast of junction between C-20 and C-Line roads.

Map Unit: 544—Coppercreek-Tectah-Lackscreek 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: 41123-B8—Bald Hills, California

PEDON

Describers Name: Jim Popenoe & Jack Lewis

Current Taxonomic Class: Fine, mixed, semiactive, isomesic Typic Palehumults

Current Taxon Kind: series

Pedon Type: OSD pedon

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 5

Correlated Information:

Soil Name - Tectah

PSC - 30 to 80 cm.

Classificaton Date - 4/12/2010

Soil Taxonomic Edition - eighth edition

Moisture Class - udic

Moisture Subclass - udic

Sampled As Information:

Soil Name - Tectah

Taxonomic Class - Fine, mixed, semiactive, isomesic Typic Palehumult

Taxon Kind - series

Classificaton Date - 7/6/1982

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: colluvium and residuum derived from graywacke sandstone and siltstone

Landscape: mountains

Landform: bench on mountain slope

Geomorphic Component Mountains: mountainflank, center third

Hill Slope Profile: backslope

Slope Complexity: complex

Slope Shape Across: convex

Slope Shape Down: convex

Runoff: medium

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Bedrock: sandstone and siltstone

Geology: Franciscan Formation formation.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 7/6/1982 (actual site observation date)

Air Photo ID: 7-48

Surface Water Kind: none observed

Plant Association Name: Redwood Forest, old growth

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 SESE3 TSHE PSME RHODO GASH MANE2 POMU BLSP VAPA GAYLU	Lithocarpus densiflorus Sequoia sempervirens Tsuga heterophylla Pseudotsuga menziesii Rhododendron Gaultheria shallon Mahonia nervosa Polystichum munitum Blechnum spicant Vaccinium parvifolium Gaylussacia	tanoak redwood western hemlock Douglas-fir rhododendron salal Cascade barberry western swordfern deer fern red huckleberry huckleberry	— — — — — — — — — — —	— — — — — — — — — — —	— — — — — — — — — — —

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon argillic horizon	0—30 30—185	—30— —155—

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
35	—	—	366	—	190	2160	—	275	11	14	9	—	—	—	—	—	—	—	—

Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; fragments; abrupt smooth boundary.; moist when described; observed in pit, small

A—5 to 30 centimeters (2.0 to 11.8 inches); dark yellowish brown (10YR 4/4) broken face, light yellowish brown (10YR 6/4) broken face, dry; silty clay loam; 31 percent clay; strong medium 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 irregular and 4.0 fine irregular pores; 7 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; moderately acid, pH 5.6, pH meter; gradual smooth boundary. Lab sample # 10N03095; moist when described; observed in pit, small

BAt—30 to 54 centimeters (11.8 to 21.3 inches); strong brown (7.5YR 4/6) broken face, reddish yellow (7.5YR 7/6) broken face, dry; silty clay loam; 34 percent clay; strong medium subangular blocky structure; 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 irregular and 4.0 very fine tubular pores; 7 percent distinct clay films on surfaces along pores and 8 percent distinct clay films on all faces of peds; 4 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; moderately acid, pH 5.6, pH meter; gradual smooth boundary. Lab sample # 10N03096; moist when described; observed in pit, small

Bt1—54 to 79 centimeters (21.3 to 31.1 inches); yellowish brown (10YR 5/6) broken face, reddish yellow (7.5YR 7/6) broken face, dry; silty clay; 39 percent clay; strong coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; moderately slow permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots and 0.5 coarse roots; 4.0 very fine tubular and 4.0 very fine interstitial pores; 35 percent distinct clay films on surfaces along pores and 35 percent distinct clay films on all faces of peds; 9 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; strongly acid, pH 5.2, pH meter; diffuse smooth boundary. Lab sample # 10N03097; moist when described; observed in pit, small

Bt2—79 to 115 centimeters (31.1 to 45.3 inches); yellowish brown (10YR 5/8) broken face, yellow (10YR 7/6) broken face, dry; silty clay; 38 percent clay; moderate coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; moderately slow permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots; 4.0 very fine tubular and 4.0 very fine interstitial pores; 17 percent distinct clay films on all faces of peds and 20 percent distinct clay films on surfaces along pores; 7 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; strongly acid, pH 5.1, pH meter; diffuse smooth boundary. Lab sample # 10N03098; moist when described; observed in pit, small

Bt3—115 to 155 centimeters (45.3 to 61.0 inches); yellowish brown (10YR 5/8) broken face, yellow (10YR 7/6) broken face, dry; silty clay loam; 36 percent clay; moderate coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; moderately slow permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots; 4.0 very fine tubular and 4.0 very fine interstitial pores; 17 percent distinct clay films on all faces of peds and 20 percent distinct clay films on surfaces along pores; 6 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; strongly acid, pH 5.2, pH meter; diffuse smooth boundary. Lab sample # 10N03099; moist when described; observed in pit, small

Bt4—155 to 185 centimeters (61.0 to 72.8 inches); yellowish brown (10YR 5/8) broken face, yellow (10YR 7/6) broken face, dry; silty clay loam; 37 percent clay; moderate coarse subangular blocky structure; hard, friable, moderately sticky, moderately plastic; moderately slow permeability; 0.5 very fine roots and 0.5 medium roots and 0.5 fine roots; 4.0 very fine tubular and 4.0 very fine interstitial pores; 17 percent faint clay films on all faces of peds and 20 percent faint clay films on surfaces along pores; 8 percent by volume moderately coherent cemented 2-38-75 millimeter sandstone-siltstone fragments; noneffervescent; strongly acid, pH 5.1, pH meter. Lab sample # 10N03100; moist when described; observed in pit, small