LOCATION RENNIE WA

Established Series
Rev. CJM/DRU/EED
04/2017

RENNIE SERIES

Landscape--river valleys
Landform--oxbows, backswamps, depressions
Slope--0 to 5 percent
Parent material--alluvium
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine-silty, mixed, superactive, nonacid, mesic Fluvaquentic Humaquepts

TYPICAL PEDON: Rennie silty clay loam, forested

A1--0 to 10 cm; silty clay loam, black (7.5YR 2.5/1) moist, very dark grayish brown (10YR 3/2) dry; strong very fine granular structure; soft, very friable, moderately sticky and slightly plastic; many very fine and common fine and medium roots; many very fine and few medium irregular pores; strongly acid (pH 5.2); clear wavy boundary

A2--10 to 35 cm; silty clay loam, black (7.5YR 2.5/1) moist, brown (7.5YR 4/2) dry; strong fine subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; common very fine and fine and few medium roots; many very fine tubular and few medium irregular pores; 5 percent fine prominent dark reddish brown (5YR 3/4) masses of oxidized iron lining pores; moderately acid (pH 5.6); clear wavy boundary

Bg1--35 to 85 cm; silty clay loam, gray (10YR 5/1) moist, light gray (10YR 7/2) dry; strong fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few very fine roots; common very fine tubular pores; 30 percent fine prominent strong brown (7.5YR 5/6) masses of oxidized iron lining pores; slightly acid (pH 6.1); gradual wavy boundary

Bg2--85 to 100 cm; silty clay loam, gray (10YR 5/1) moist, light gray (10YR 7/2) dry; strong fine subangular blocky structure; very hard, firm, very sticky and very plastic; few very fine roots; common very fine tubular pores; 30 percent fine prominent strong brown (7.5YR 5/6) masses of oxidized iron lining pores; slightly acid (pH 6.1) abrupt wavy boundary

Bg3--100 to 150 cm; silty clay, dark gray (2.5Y 4/1) moist, light brownish gray (2.5Y 6/2) dry; strong fine subangular blocky structure; very hard, firm, very sticky and very plastic; few fine roots; common very fine tubular pores; slightly acid (pH 6.2)

TYPE LOCATION: Thurston County, Washington; about 1.8 km west of Rochester and about 165 m south of State Highway 12, about 180 m west and 125 m north of the southeast corner of section 36, T. 16 N., R. 4 W., Willamette Meridian; Rochester, Washington, U.S. Geological Survey quadrangle; latitude 46.8228470 degrees north, longitude 123.1204600 degrees west, WGS 84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 12 degrees C
Umbric epipedon thickness--25 to 50 cm
Depth to aquic conditions--0 to 30 cm
Rock fragment content--0 to 10 percent
Reaction (pH)--5.1 to 6.5
Particle-size control section--18 to 35 percent clay (weighted average); 0 to 15 percent sand

A horizon
Hue--7.5YR to 2.5Y, neutral
Value--2 to 3 moist, 3 to 5 dry
Chroma--neutral, 1 to 3 moist or dry
Fine-earth texture--silty clay loam, silt loam
Clay content--18 to 35 percent
Organic carbon content--0.5 to 6.0 percent
Combined thickness--25 to 50 cm

Bg1 horizon
Hue--10YR to 2.5Y, neutral
Value--4 or 5 moist, 6 or 7 dry
Chroma--neutral, 1 or 2 moist or dry
Fine-earth texture--silty clay loam, silt loam
Clay content--18 to 35 percent
Organic carbon content--0.5 to 3.0 percent
Thickness--30 to 60 cm

Bg2 and Bg3 horizons
Hue--10YR to 2.5Y, neutral
Value--4 or 5 moist, 6 or 7 dry
Chroma--neutral, 1 or 2 moist or dry
Fine-earth texture--silt loam, silty clay loam, silty clay
Clay content--18 to 50 percent
Organic carbon content--0.30 to 1.75 percent
Combined thickness--50 to 85 cm

Cg horizon (where present)
Hue--5GY to 2.5Y, neutral
Value--3 to 5 moist, 3 to 5 dry
Chroma--neutral, 1 to 3 moist, 2 to 3 dry
Fine-earth texture--silty clay loam, clay, silt loam; some horizons may be stratified
Clay content--18 to 50 percent
Organic carbon content--0.3 to 1.0 percent

COMPETING SERIES:
Quosatana--25 to 35 percent clay in particle-size control section; no neutral hue or chroma

GEOGRAPHIC SETTING:
Elevation--0 to 55 m
Mean annual precipitation--1200 to 1800 mm
Mean annual air temperature--10 to 11 degrees C
Frost-free period--150 to 200 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Chehalis--no aquic conditions within 120 cm of the soil surface; in slightly convex to linear positions of flood plains and on alluvial terraces
Eld--no aquic conditions; in slightly convex to linear positions of flood plains and on alluvial terraces
Fordprairie, Maytown--no aquic conditions within 50 cm of the soil surface; in concave to linear positions of flood plains
Gate--no aquic conditions within 75 cm of the soil surface; in convex to linear positions of alluvial fans and terraces
Rony--no aquic conditions within 30 cm of the soil surface; in concave to linear positions of alluvial fans and terraces
Scatter, Newberg, Elma--no aquic conditions; on convex natural levees and alluvial terraces
Salzer--greater than 35 percent clay throughout particle-size control section; frequent, very long periods of ponding; on similar landforms

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Depth to apparent seasonal water table--at the surface to a depth of 30 cm at times in October through May, 20 to 100 cm in June and July
Flooding--frequent, brief periods in November through April
Ponding--frequent, long periods in November through May
Saturated hydraulic conductivity (Ksat)--moderately low to moderately high in A and Bg1 horizons, low to moderately high in Bg2 and Bg3 horizons

Ponding and the seasonal high water table in some pedons may be altered by artificial drainage.
Flooding in some pedons may be altered by flood protection structures.

USE AND VEGETATION:
Use--wildlife habitat, hay and crop production in cleared and/or artificially drained or protected areas
Native vegetation--red alder, Oregon ash, cascara, western redcedar, salmonberry, redosier dogwood, willow, Douglas spirea, slough sedge, bulrush

DISTRIBUTION AND EXTENT: Western Washington; MLRA 2; moderate extent

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Grays Harbor County (Grays Harbor County Area), Washington; 1970

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 25 to 100 cm
*Umbric epipedon--zone from the surface to a depth of 35 cm
*Cambic horizon--zone from 35 to 150 cm
*Aquic conditions--zone from the surface to a depth of 150 cm
*Endosaturation--zone from the surface to a depth of 150 cm
*Redoximorphic depletions with chroma of 2 or less--zone from 35 to 150 cm

11/2016-- Based on update field investigations, the type location was moved, the soil classification was changed from fine, mixed, superactive, nonacid, mesic Vertic Endoaquepts, and the series concept was limited to MLRA 2 soils with endosaturation. The official series description was edited according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Further field investigation to recorrelate Rennie soils mapped in the flood plains of MLRAs 1 and 4a is recommended.

National Cooperative Soil Survey
U.S.A.