IDENTIFIERS

Current Taxon Name (Soil Name): Bigriver

OSD

Series Extent

User Site ID: S2006CA601800

User Pedon ID: S2007CA023007

Vegetation Plot ID: S2006CA601800

Lab Information:

Certified Lab Pedon Description - no

Lab Source ID - SSL

Lab Pedon # - 07N0360

NCSS Pedon Lab Data NASIS Record ID - 18873

Print Date: 11/21/2024

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: 40.3499746

Std. Longitude: -123.9286891

Datum: WGS84

Location Description: Humboldt Redwoods State Park, Mahan Trail.

Map Unit: 179—Eelriver and Cottoneva soils, 0 to 2 percent slopes

State: California

County: CA023—Humboldt

MLRA: 4B—Coastal Redwood Belt

Non-MLRA Soil Survey Area: CA601—Humboldt County, South Part, California

7.5 Minute USGS Quad: 40123-C8—Weott, California

PEDON

Describers Name: Jonathan W. Hooper and Jennifer T. Berman

Current Taxonomic Class: Coarse-loamy, mixed, superactive, nonacid, isomesic Typic Udifluvents

Current Taxon Kind: series

Pedon Type: classifies to current taxon name, full description

Pedon Purpose: full pedon description

Pedon Record Orgin: NASIS

Pedon #: 7

Correlated Information:

Soil Name - Bigriver

PSC - 25 to 100 cm.

Classificaton Date - 1/28/2010

Soil Taxonomic Edition - ninth edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Bigriver

Classificaton Date - 12/28/2006

Dynamic Soil Properties:

Erosion Class - 0

Pedoderm Loose Cover Indicator - no

Hydric: no

SITE

Parent Material: alluvium derived from mixed

Landscape: river valley

Landform: flood-plain step

Geomorphic Component Terraces: tread

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Runoff: low

Drainage Class: well

Flooding: rare flooding for very brief periods begining in jan

Ponding: frequent ponding for very brief periods begining in dec

Geology: Quaternary Alluvium member.

Surface Fragments:

Benchmark Soil?: no

VEGETATION

SITE OBSERVATION

Observation Date: 12/28/2006 (actual site observation date)

Air Photo ID: 6261-21

Surface Water Kind: none observed

Plant Association Name: redwood forest

Surface Cover Properties:

Site Obs. Cover Kind 1 - crop cover

Site Obs. Cover Kind 2 - row crop

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 OXOR POMU SESE3	Lithocarpus densiflorus Oxalis oregana Polystichum munitum Sequoia sempervirens	tanoak redwood-sorrel western swordfern redwood	— — — —	— — — —	— — — —

Site Soil Temperature
Site Obs. Date	Depth	Sensor Kind	Temperature
	cm		C
12/28/2006	50	—	9

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
1	—	—	36	—	200	1500	—	345	13	—	—	11	—	—	—	—	—	—	—

Oi—0 to 5 centimeters (0.0 to 2.0 inches); slightly decomposed plant material; 2.0 very fine roots throughout and 1.0 medium roots throughout and 2.0 fine roots throughout; fragments; noneffervescent; abrupt smooth boundary.; moist when described; observed in pit, small

A—5 to 28 centimeters (2.0 to 11.0 inches); dark brown (10YR 3/3) broken face, brown (10YR 5/3) broken face, dry; silt loam; 17 percent clay; moderate medium granular structure; moderately hard, friable, slightly sticky, slightly plastic; 3.0 very fine roots throughout and 1.0 coarse roots throughout; 1.0 very fine tubular pores; fragments; noneffervescent; slightly acid, pH 6.4, chlorophenol red; clear smooth boundary. Lab sample # 07N01860; moist when described; observed in pit, small

C1—28 to 75 centimeters (11.0 to 29.5 inches); olive brown (2.5Y 4/3) broken face, light yellowish brown (2.5Y 6/3) broken face, dry; loam; 17 percent clay; massive; moderately hard, friable, slightly sticky, slightly plastic; 1.0 medium roots throughout and 2.0 fine roots throughout; 0.5 very fine tubular pores; fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red; clear smooth boundary. Lab sample # 07N01861; moist when described; observed in auger, bucket

Ab—75 to 115 centimeters (29.5 to 45.3 inches); dark brown (10YR 3/3) broken face, brown (10YR 5/3) broken face, dry; loam; 17 percent clay; weak fine granular, and weak medium granular structure; moderately hard, friable, slightly sticky, slightly plastic; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 5 percent medium distinct dark gray (2.5Y 4/1), moist, iron-manganese masses in matrix and 10 percent medium distinct dark yellowish brown (10YR 4/4), moist, iron-manganese masses in matrix; fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red; clear smooth boundary.; moist when described; observed in auger, bucket

C2—115 to 125 centimeters (45.3 to 49.2 inches); dark olive brown (2.5Y 3/3) broken face, light olive brown (2.5Y 5/3) broken face, dry; loam; 15 percent clay; structureless massive; slightly hard, very friable, slightly sticky, slightly plastic; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 30 percent distinct organic stains on surfaces along pores and 30 percent distinct organic stains on surfaces along root channels; 10 percent fine distinct dark gray (2.5Y 4/1), moist, iron depletions in matrix and 25 percent fine distinct dark yellowish brown (10YR 4/4), moist, iron-manganese masses in matrix; fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red; clear smooth boundary.; moist when described; observed in auger, bucket

C3—125 to 145 centimeters (49.2 to 57.1 inches); reddish brown (2.5YR 4/3) broken face, light reddish brown (2.5YR 6/3) broken face, dry; loamy sand; 5 percent clay; structureless massive; soft, very friable, nonsticky, nonplastic; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 30 percent distinct organic stains on surfaces along pores and 30 percent distinct organic stains on surfaces along root channels; 10 percent medium distinct dark yellowish brown (10YR 4/4), moist, iron-manganese masses in matrix; fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red; clear smooth boundary.; moist when described; observed in auger, bucket

C4—145 to 180 centimeters (57.1 to 70.9 inches); olive brown (2.5Y 4/3) broken face, light yellowish brown (2.5Y 6/3) broken face, dry; sandy loam; 12 percent clay; structureless massive; slightly hard, very friable, slightly sticky, slightly plastic; 0.5 very fine roots throughout; 0.5 very fine tubular pores; 2 percent medium distinct dark yellowish brown (10YR 3/4), moist, iron-manganese masses in matrix; fragments; noneffervescent; slightly acid, pH 6.2, chlorophenol red.; moist when described; observed in auger, bucket