Six Rivers National Forest Area, California

Survey Area CA701• California

The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Inceptisols — young soils with minimal horizon development but more than Entisols. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Six Rivers National Forest Area, California. Search your address to find the exact soil composition, drainage, and series details at your specific location.

Soil Map Unit	Acres	Drainage	Hydro Group	Dwellings	Septic
Clallam family, moderately deep-Hugo family, deep,maymen family association, 35 to 70 percent slopes	76K	Well drained	C	Very limited	Very limited
Skalan-Kristirn-Holland families association, deep, 35 to 70 percent slopes	65K	Well drained	C	Very limited	Very limited
Jayel family, moderately deep-Walnett family, deep-Lithic Xerochrepts, ultramafic association, stony, 35 to 75 percent slopes	46K	Well drained	C	Very limited	Very limited
Hugo family, moderately deep, 50 to 70 percent slopes	45K	Well drained	C	Very limited	Very limited
Clallam-Hugo-Holland families association, deep, dry, 35 to 70 percent slopes	43K	Well drained	B	Very limited	Very limited
Clallam-Hugo-Holland families association, deep, 35 to 70 percent slopes	33K	Well drained	B	Very limited	Very limited
Nanny fanily, deep-Woodseye family-Bins family, deep association, 35 to 70 percent slopes	30K	Well drained	B	Very limited	Very limited
Rock outcrop-Xerorthents complex,metaigneous, 60 to 90 percent slopes	27K	Excessively drained	D	Very limited	Very limited
Deadwood family-Clallam family, deep, extremely gravelly-Rock outcrop, metasedimentary association, 45 to 85 percent slopes	27K	Well drained	D	Very limited	Very limited
Clallam family, moderately deep, 50 to 70 percent slopes	27K	Well drained	C	Very limited	Very limited
Melbourne-Holland families association, deep, 35 to 70 percent slopes	26K	Well drained	C	Very limited	Very limited
Clallam family, extremely gravelly-Skalan-Goldridge families,deep, 35 to 70 percent slopes	25K	Well drained	C	Very limited	Very limited
Clallam family, moderately deep-Maymen family association, 45 to 80 percent slopes	25K	Well drained	C	Very limited	Very limited
Gasquet-Walnett families, deep,stony-Jayel family, moderately deep association, 10 to 50 percent slopes	25K	Well drained	C	Very limited	Very limited
Clallam family, deep, extremely gravelly-Deawood family association, 35 to 75 percent slopes	23K	Well drained	B	Very limited	Very limited
Doty-Hecker families association, deep, 25 to 70 percent slopes	23K	Well drained	B	Very limited	Very limited
Kistirn-Goldridge families, deep-Deadwood family association, 30 to 70 percent slopes	21K	Well drained	C	Very limited	Very limited
Clallam family, moderately deep, unstable-Melbourne family, deep association, 35 to 70 percent slopes	17K	Well drained	C	Very limited	Very limited
Jayel family, moderately deep, stony-Walnett family, deep, stony-Oragran family complex, 5 to 35 percent slopes	16K	Well drained	C	Very limited	Very limited
Holland-Goldridge families association, deep, 5 to 35 percent slopes	15K	Well drained	B	Very limited	Very limited

Soil Orders in This Area

The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.

Inceptisols

Young but developing soils found in mountains and river terraces. Variable properties — check drainage and bedrock depth.

Alfisols

Moderately weathered forest soils with clay-enriched subsoil. Productive for agriculture, generally good for building and septic.

Ultisols

Strongly weathered clay soils of the Southeast. Acidic and naturally low in nutrients. Clay subsoil can slow drainage.

Mollisols

Fertile grassland soils with thick, dark topsoil. Among the best for agriculture, building, and gardening.

Entisols

Young soils with little development — found on floodplains, dunes, and steep slopes. Properties vary widely by setting.

What This Means

Building & Foundations

About 100% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes. A geotechnical assessment is recommended before building.

Septic Systems

About 100% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.

Gardening & Agriculture

Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.