Trinity County, California, Weaverville Area

Survey Area CA606• California

The dominant drainage class is Well drained and the dominant hydrologic group is B (moderate infiltration). The most common soil order is Alfisols — moderately leached forest soils with a clay-enriched subsoil. 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 Trinity County, California, Weaverville Area. 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
BROWNSCREEK-DOUGCITY COMPLEX, 50 TO 75 PERCENT SLOPES	15K	Well drained	C	Very limited	Very limited
MARPA-HOOSIMBIM-BAMTUSH COMPLEX, 50 TO 75 PERCENT SLOPES	13K	Well drained	B	Very limited	Very limited
TALLOWBOX-MINERSVILLE COMPLEX, 50 TO 75 PERCENT SLOPES	9K	Somewhat excessively drained	B	Very limited	Very limited
BROCKGULCH-DEDRICK-BROWNBEAR COMPLEX, 50 TO 75 PERCENT SLOPES	9K	Well drained	C	Very limited	Very limited
SHEETIRON-BARPEAK COMPLEX, 50 TO 90 PERCENT SLOPES	8K	Well drained	C	Very limited	Very limited
VALCREEK-MINERSVILLE-CHOOP COMPLEX, 30 TO 75 PERCENT SLOPES	8K	Excessively drained	A	Very limited	Very limited
INDLETON-CARIS-HOOSIMBIM COMPLEX, 50 TO 75 PERCENT SLOPES	7K	Well drained	B	Very limited	Very limited
BARPEAK-SHEETIRON COMPLEX, 50 TO 90 PERCENT SLOPES	7K	Well drained	B	Very limited	Very limited
GOULDING-VITZTHUM-VANVOR COMPLEX, 50 TO 75 PERCENT SLOPES	6K	Somewhat excessively drained	D	Very limited	Very limited
PARDALOE-GOULDING COMPLEX, 50 TO 75 PERCENT SLOPES	4K	Well drained	B	Very limited	Very limited
BAMTUSH-BROWNBEAR COMPLEX, 50 TO 75 PERCENT SLOPES	4K	Well drained	B	Very limited	Very limited
HOOSIMBIM-BAMTUSH-MARPA COMPLEX, 30 TO 50 PERCENT SLOPES	4K	Well drained	B	Very limited	Very limited
BROWNSCREEK-DOUGCITY COMPLEX, 30 TO 50 PERCENT SLOPES	4K	Well drained	C	Very limited	Very limited
BEARGULCH-SKYROCK COMPLEX, 50 TO 75 PERCENT SLOPES	4K	Well drained	B	Very limited	Very limited
CREFORK CLAY LOAM, 15 TO 30 PERCENT SLOPES	3K	Well drained	D	Very limited	Very limited
HOLKAT-HOOSIMBIM COMPLEX, 50 TO 75 PERCENT SLOPES	3K	Well drained	C	Very limited	Very limited
MUSSERHILL-WEAVERVILLE COMPLEX, 30 TO 50 PERCENT SLOPES	3K	Well drained	C	Very limited	Very limited
BROWNBEAR-BAMTUSH COMPLEX, 30 TO 50 PERCENT SLOPES	3K	Well drained	C	Very limited	Very limited
BAMTUSH-BROWNBEAR-WEAVERVILLE COMPLEX, 30 TO 75 PERCENT SLOPES	3K	Well drained	C	Very limited	Very limited
CARIS EXTREMELY GRAVELLY SANDY LOAM, 50 TO 75 PERCENT SLOPES	3K	Well drained	C	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.

Alfisols

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

Inceptisols

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

Entisols

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

Mollisols

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

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.