LOCATION DAMEWOOD                OR

Established Series
Rev. ACT/TDT
06/2011

DAMEWOOD SERIES

The Damewood series consists of moderately deep, well drained soils that formed in colluvium weathered from sandstone. Damewood soils are on uplands and have slopes of 30 to 90 percent. The mean annual precipitation is about 80 inches and the mean annual temperature is about 52 degrees F.

TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Andic Humudepts

TYPICAL PEDON: Damewood very gravelly medial loam, 80 percent east-facing slope in a forested area. When described, the soil was moist throughout. (Colors are for moist soil unless otherwise stated.)

Oi--0 to 2 inches; slightly decomposed litter of fir needles, leaves, twigs, roots. (1 to 5 inches thick)

A1--2 to 6 inches; very dark brown (10YR 2/2) very gravelly medial loam, brown (10YR 5/3) dry; moderate fine and medium granular structure; soft, very friable, slightly sticky and nonplastic; many very fine and fine and common medium roots; many continuous irregular pores; 40 percent gravel, 5 percent cobbles; strongly acid (pH 5.2); clear smooth boundary. (3 to 8 inches thick)

A2--6 to 13 inches; very dark brown (10YR 2/2) very gravelly medial loam, brown (10YR 5/3) dry; moderate very fine and fine subangular blocky structure parting to granular; soft, friable, moderately sticky and slightly plastic; many very fine and fine roots; many very fine and fine continuous irregular and tubular pores; 30 percent gravel, 15 percent cobbles; strongly acid (pH 5.2); clear smooth boundary. (6 to 15 inches thick)

Bw--13 to 31 inches; dark brown (10YR 3/3) extremely gravelly loam, brown (10YR 5/3) dry; weak medium and coarse subangular blocky structure; soft, friable, slightly sticky and slightly plastic; common fine and medium roots; many very fine and fine continuous irregular and tubular pores; 50 percent pebbles, 25 percent cobbles; very strongly acid (pH 4.8); abrubt smooth boundary. (10 to 20 inches thick)

R--31 inches; hard sandstone bedrock.

TYPE LOCATION: Douglas County, Oregon; about 5 miles northeast of Vincent Creek Guard Station; 100 feet west and 400 feet south of the Northeast corner of section 27, T. 20 S., R. 9 W.

RANGE IN CHARACTERISTICS: The soils are usually moist and are dry for less than 45 consecutive days. The mean annual soil temperature is 47 to 55 degrees F. Solum thickness and depth to hard bedrock is 20 to 40 inches. The particle-size control section is loam or sandy loam and averages 15 to 25 percent clay. Umbric epipedon 20 to 40 inches thick.

The A horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist, 3 through 5 dry, and chroma of 2 or 3 moist and dry. It is strongly to moderately acid. It has 30 to 50 percent gravel and 5 to 20 percent cobbles.

The B horizon has hue of 10YR or 7.5YR, value of 2 or 3 moist to a depth of 20 inches or more, 3 through 5 dry, and chroma of 2 or 3 moist and dry; below 20 inches the value is 2 through 4 moist, 4 or 5 dry and chroma of 2 through 4 moist and dry. It is extremely or very gravelly loam or very gravelly sandy loam. It has 30 to 50 percent gravel and 15 to 30 percent cobbles. It is very strongly to strongly acid.

COMPETING SERIES: There are no other series in this family.

GEOGRAPHIC SETTING: Damewood soils are on steep ridges and smooth or dissected slopes of 30 to 90 percent slopes in mountainous topography. Elevations are 200 to 2,500 feet. The soils formed in medium textured gravelly and cobbly colluvium weathered from tuffaceous sandstone and siltstone. The climate is a modified maritime climate with an annual precipitation of 70 to 110 inches. The mean annual temperature is 45 to 53 degrees F. The frost-free season is 145 to 240 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bohannon, Preacher, Slickrock, and Umpcoos soils. The Bohannon, Preacher, and Slickrock soils have less than 35 percent coarse fragments in the particle-size control section. Bohannon and Preacher soils lack mollic colors both moist and dry below 20 inches. Preacher and Slickrock soils are over 40 inches deep to bedrock. Umpcoos soils have ochric epipedons and are 10 to 20 inches to bedrock.

DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderately rapid permeability.

USE AND VEGETATION: These soils are used for timber production and wildlife habitat. Native vegetation is dominantly Douglas-fir, western hemlock, vine maple, alder, evergreen, huckleberry, salal, cascade Oregongrape, western swordfern, brackenfern, and forbs.

DISTRIBUTION AND EXTENT: On the interior and western slopes of the Coast Range Mountains in Oregon; MLRA 1. The series is of moderate extent.

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

SERIES ESTABLISHED: Douglas County, Oregon, 1994.

REMARKS: Diagnostic horizons and other features:

Umbric epipedon - 2 to 31 inches

All depths to diagnostic horizons and features are measured from the top of the first mineral horizon.

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National Cooperative Soil Survey
U.S.A.