LOCATION KINNEY                  OR+WA

Established Series
Rev . WRP/JGM/KMS
02/2025

KINNEY SERIES

Landscape--western Cascade Mountains
Landform--mountain slopes, hillslopes, complex landslides
Slope--0 to 90 percent
Parent material-- colluvium and residuum derived from volcanic rocks
Mean annual precipitation--about 1900 mm
Mean annual air temperature--about 9 degrees C
Depth class--deep or very deep to paralithic contact
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine-loamy, isotic, mesic Andic Humudepts

TYPICAL PEDON: Kinney cobbly loam, forested

Oi--0 to 3 cm; slightly decomposed plant material consisting of ferns, fir needles, leaves, and twigs

Oa--3 to 5 cm; highly decomposed plant material, black (10YR 2/1) moist

A1--5 to 15 cm; cobbly loam, brown (10YR 4/3) dry, very dark brown (10YR 2/2) moist; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and medium roots; many very fine irregular pores; many medium and fine shot; 15 percent gravel and 10 percent cobbles; strongly acid (pH 5.3); clear smooth boundary

A2--15 to 30 cm; cobbly loam, brown (10YR 4/3) dry, very dark brown (10YR 2/2) moist; moderate medium and fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many fine and very fine roots; many very fine irregular pores; many medium and fine shot; 15 percent gravel and 10 percent cobbles; strongly acid (pH 5.1); abrupt wavy boundary

BA--30 to 43 cm; cobbly clay loam, brown (10YR 4/3) dry, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many medium to very fine roots; many very fine tubular pores; few thin darker colored coatings on surface of peds; many medium and fine shot; 15 percent gravel and 15 percent cobbles; strongly acid (pH 5.3); clear wavy boundary

Bw1--43 to 56 cm; very cobbly clay loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common roots; many very fine tubular pores; thin continuous slightly darker coatings on peds; many coarse sand-sized particles of quartzlike material; 15 percent gravel and 15 percent cobbles; strongly acid (pH 5.3); gradual smooth boundary

Bw2--56 to 107 cm; very cobbly clay loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; weak coarse and medium subangular blocky structure; slightly sticky and slightly plastic; common roots; many very fine tubular pores; common coarse sand-sized particles of quartzlike material; 20 percent gravel and 15 percent cobbles; very strongly acid (pH 5.0); clear wavy boundary

C--107 to 140 cm; very cobbly loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few roots; many very fine pores; many coarse sand-sized particles of quartzlike material; 20 percent gravel and 15 percent cobbles; very strongly acid (pH 4.8); abrupt irregular boundary

Cr--140 cm; partially weathered basic igneous agglomerate, variegated light olive brown (2.5Y 5/4) dry, pale yellow (2.5Y 7/4), yellow (2.5Y 7/6), and dark red (2.5YR 3/6) moist; very strongly acid (pH 4.8)

TYPE LOCATION: Marion County, Oregon, about 5 km southeast of the South Burn Guard Station, 18 m north of South Burn Road; in the NW1/4NE1/4SW1/4 of section 31, T. 8 S., R. 2 E; latitude 44.8336531, longitude -122.6163120, datum WGS 84 (coordinates estimated from PLSS details)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 11 degrees C
Thickness of umbric epipedon--25 to 50 cm
Depth to paralithic contact--greater than 100 cm
Hue--7.5YR, 10YR

Properties of layers meeting andic subgroup criteria
*1/3-bar bulk density--0.70 to 1.0 g/cm3
*Phosphate retention--50 to 100 percent
*Ammonium oxalate Al plus 1/2 Fe--1.0 to 2.0 percent
*Volcanic glass content in the coarse silt fraction--5 to 10 percent
*Thickness--18 to 50 cm

Particle-size control section (weighted average)
*Clay content--18 to 35 percent
*Total fragment content--0 to 35 percent
*Particles coarser than very fine sand in the fine-earth fraction--greater than 15 percent

O horizons
*Composition--slightly to highly decomposed plant material
*Thickness--0 to 8 cm

A horizons
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--2 to 4 dry or moist
*Fine-earth texture--loam, silt loam
*Clay content--18 to 27 percent
*Sand content--25 to 50 percent
*Total fragment content--0 to 35 percent
*Gravel content--0 to 35 percent
*Cobble content--0 to 20 percent
*Reaction--pH 5.1 to 6.5
*Combined thickness--18 to 36 cm

BA horizon
*Value--2 to 3 moist, 3 to 5 dry
*Chroma--2 to 4 dry or moist
*Fine-earth texture--loam, silt loam, clay loam
*Clay content--18 to 35 percent
*Sand content--20 to 45 percent
*Total fragment content--0 to 35 percent
*Gravel content--0 to 35 percent
*Cobble content--0 to 20 percent
*Reaction--pH 5.1 to 6.0
*Thickness--0 to 20 cm

Bw horizons
*Value--3 to 6 moist, 4 to 6 dry
*Chroma--2 to 4 dry or moist
*Fine-earth texture--loam, silt loam, clay loam
*Clay content--22 to 35 percent
*Sand content--20 to 45 percent
*Total fragment content--0 to 35 percent
*Gravel content--0 to 25 percent
*Cobble content--0 to 20 percent
*Reaction--pH 4.5 to 5.5
*Combined thickness--50 to 150 cm

C horizon (when present)
*Value--3 to 6 moist, 4 to 6 dry
*Chroma--4 to 8 dry or moist
*Fine-earth texture--loam, silt loam, clay loam
*Clay content--22 to 35 percent
*Sand content--20 to 45 percent
*Total fragment content--0 to 45 percent
*Gravel content--0 to 25 percent
*Cobble content--0 to 20 percent
*Reaction--pH 4.5 to 5.5

COMPETING SERIES:
Bohannon--50 to 100 cm to paralithic contact
Gobar--averages 15 to 55 percent parafragments in the particle-size control section
Hembre-- andic soil properties in the upper part of the umbric epipedon
Preacher--andic soil properties in the upper part of the umbric epipedon

GEOGRAPHIC SETTING:
Elevation--200 to 1200 m
Climate--mild, wet winters; warm, dry summers
Mean annual precipitation--1200 to 2300 mm
Frost-free period--100 to 200 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Blachly--ochric epipedon; fine particle-size family; located on mountain slopes
Harrington--loamy-skeletal particle-size family; 50 to 100 cm to lithic contact; located on uplands
Kilchis--loamy-skeletal particle-size family; 30 to 50 cm to lithic contact; located on mountain slopes
Klickitat--loamy-skeletal particle-size family; 100 to 150 cm to lithic contact; located on uplands
McCully--fine particle-size family; 5YR or 2.5YR hues in cambic horizon; located on mountaintops
Minniece--aquic conditions below the epipedon; located in drainageways and basins
Quartzville--fine particle-size family; located on uplands

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturation in normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high or high

USE AND VEGETATION:
Use--timber production, wildlife habitat, recreation
Potential natural vegetation--Douglas-fir, western hemlock, vine maple, salal, western swordfern, western brackenfern

DISTRIBUTION AND EXTENT: Foothills of western Cascade Mountains in Oregon and Washington; MLRA 3; large extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Marion County, Oregon; 1974

REMARKS:
Diagnostic horizons and features in this pedon
*Umbric epipedon--zone from 5 to 43 cm
*Cambic horizon--zone from 43 to 107 cm
*Andic subgroup feature--zone from 5 to 30 cm
*Depth to paralithic contact--140 cm

5/2023--Laboratory data for geographically associated soils supports andic subgroup criteria, but epipedons fall short of criteria for andic soil properties.

7/2016--Assumed layers with andic soil properties meet criteria 2 (no ash required) in the 12th edition of Keys to Soil Taxonomy. It is also assumed that enough ash is present for those layers to meet criteria 3. Additional lab data is needed to confirm the degree of ash influence. The Kinney series has been mapped in Clackamas, Clark, Douglas, Lane, Linn, Marion, and Skamania Counties. Ash influence has been recognized in some of these counties, but not in all of them. The series has also been mapped on granodiorite in Skamania County and as formed in till in Lane and Marion Counties. Future investigation is needed to confirm the extent of the volcanic ash influence and to determine the correct parent material.

Climate and elevation data suggest that the Kinney series has been mapped across both mesic and frigid temperature regimes. Further investigation is needed to determine if the soils at the higher elevations should be correlated to the similar Browder series in the frigid zone.

The Gobar series is similar to the Kinney series; it should be reviewed for potential correlation into the Kinney series.

ADDITIONAL DATA:
Characterization data--two profiles (S60 Oregon 24-1) for soil sampled in Marion County, Oregon; Riverside Soil Survey Laboratory; 1960

---

National Cooperative Soil Survey
U.S.A.