Bayshore Soil Series
USDA Code: CA0048
K-Factor
0.32
Soil Erodibility Factor
Texture Class
silty clay
Drainage Class
very poorly drained
About Bayshore
Very deep, very poorly drained soils formed in estuarine alluvium of mixed origin, dominated by fine-textured bay muds deposited under tidal and subtidal conditions. Saline and sodium-affected in many areas. Found on tidal flats and reclaimed bay margins at near sea level.
K factor values are sourced from the USDA Natural Resources Conservation Service (NRCS) SSURGO database.
Using Bayshore in a RUSLE calculation
For a California construction project, use the soil K factor with rainfall erosivity, slope length and steepness, cover management, and support practice inputs. The K factor represents the soil erodibility portion of the model, so selecting the soil series that matches the site is important for defensible stormwater documentation.
In a SWPPP workflow, the practical question is not just what soil type is mapped near the project. It is whether the mapped series, K factor, and drainage assumptions match the site evidence well enough to support the RUSLE or RUSLE2 calculation.
California Distribution
Mapped around the margins of San Francisco Bay, occurring in San Francisco, San Mateo, and Marin counties. Historically supports tidal wetlands and salt marshes; heavily impacted by bay fill and urban development.
Counties Where Found
Bayshore soil FAQ
What is the K factor for Bayshore soil?
Bayshore has a listed K factor of 0.32 in the Rapid RUSLE soil directory. Confirm final values against project specific soil survey data before submitting permit documents.
Where is Bayshore soil found in California?
Bayshore is mapped in Alameda, Contra Costa, Marin, and other California counties. County mapping is based on available soil series data and should be verified for the exact project location.
How is Bayshore used in RUSLE erosion calculations?
Use the Bayshore K factor as the soil erodibility input in RUSLE or RUSLE2, along with rainfall, slope, cover, and support practice factors for the site.
Calculate erosion risk with Bayshore soil data
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