LOCATION SINCLAIR WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Andic Durorthods
TYPICAL PEDON: Sinclair gravelly sandy loam, forested. (Colors are for moist soil unless otherwise noted.)
01--2 3/4 inches to 3/4 inch; needles, leaves, bark, and wood fragments.
02--3/4 inch to 0; black (5YR 2/1) partially decayed needles, leaves, bark, and wood fragments; strongly acid (pH 5.2); abrupt wavy boundary. (1/2 to 1 1/2 inches thick)
A2--0 to 2 inches; grayish brown (10YR 5/2) fine sandy loam, gray (10YR 6/1) dry; weak very fine and fine granular structure; soft, very friable,; many fine and medium roots; medium acid (pH 5.8); abrupt wavy boundary. (2 to 4 inches thick)
B1--2 to 8 inches; dark brown (7.5YR 4/2) very gravelly sandy loam, pinkish gray (7.5YR 6/2) dry; weak fine granular structure; soft, friable,; many fine and medium roots; medium acid (pH 5.8); abrupt wavy boundary. (2 to 4 inches thick)
B21ir--8 to 18 inches; dark brown (7.5YR 4/4) very gravelly sandy loam, pale brown (10YR 6/3) dry; weak very fine and fine subangular blocky structure; slightly hard, friable; many fine and medium roots; common hard dark concretions; medium acid (pH 6.0); clear wavy boundary. (8 to 10 inches thick)
B22--18 to 25 inches; dark yellowish brown (10YR 4/4) very gravelly sandy loam, pale brown (10YR 6/3) dry; moderate medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and medium roots; medium acid (pH 6.0); clear wavy boundary. (7 to 11 inches thick)
Bsim--25 to 36 inches; dark grayish brown (10YR 4/2) gravelly loamy sand, light brownish gray (2.5Y 6/2) dry; common fine prominent dark brown (7.5YR 4/4) mottles; massive; very compact and weakly cemented; very hard, very firm; medium acid (pH 6.0). (3 to many feet thick)
TYPE LOCATION: Jefferson County, Washington; SE1/4 NE1/4 NW1/4 section 15, T.28N., R.1W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 52 degrees F. The soil is very strongly acid to medium acid. Rock fragments in the control section range from 35 to 50 percent. Depth to the weakly cemented very compact Csim horizon ranges from 20 to 30 inches.
The A2 horizon has hue of 7.5YR through 2.5Y, value of 4 or 5 moist and chroma of 1 or 2.
The B2ir horizon has hue of 10YR or 7.5YR, value of 3 through 5 moist and chroma of 3 or 4. It is very gravelly loam or very gravelly sandy loam.
The B22 horizon has hue of 2.5Y or 10YR, value and chroma of 4 through 5. It has faint to distinct mottles in some pedons. It is very gravelly loam or very gravelly sandy loam.
The Bsim horizon has hue of 10YR or 2.5Y, value of 4 through 6, and chroma of 2 through 4. It is gravelly loamy sand or gravelly sandy loam.
COMPETING SERIES: These are the Alderwood, Dabob, Hoodsport, Poulsbo, and Shelton series. Alderwood soils have a thin A1 horizon and lack and A2 horizon. Dabob soils have 50 to 70 percent rock fragments in the control section. Hoodsport soils have hue of 5YR or redder in the Bir horizon and have 50 to 70 percent rock fragments in the control section. Poulsbo soils are coarse, loamy and have less than 35 percent rock fragments in the control section. Shelton soils have a thin A1 horizon and lack an A2 horizon.
GEOGRAPHIC SETTING: Sinclair soils are on slightly undulating to steep uplands at elevations from 100 to 800 feet. They formed in glacial till. The climate is marine with cool, dry summers and mild, wet winters. The annual precipitation ranges from 25 to 50 inches and falls mostly as rain from November through March. The mean January temperature is about 39 degrees F.; the mean July temperature is 59 degrees F.; and the mean annual temperature is about 50 degrees F. The average frost free season is about 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Everett, Hoypus, Indianola, and Kitsap soils. All of these soils lack a duripan. Also, Hoypus soils are sandy, skeletal. Indianola soils have a sandy control section. Kitsap soils are fine, silty.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to medium runoff; moderately rapid permeability above the duripan and slow to very slow in the duripan.
USE AND VEGETATION: Used mainly for woodland, wildlife, recreation and nonfarm uses; small areas are used for hay and pasture. Natural vegetation is Douglas fir, western hemlock, western red cedar, cherry, salal, huckleberry and brachenfern.
DISTRIBUTION AND EXTENT: Northwestern Washington. Series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Kitsap County, Washington, 1934.
REMARKS: Classification and nomenclature of Bsim (formerly Csim) only changed 4/94.