Napa County Putah Creek Watershed Group
Best Management Farming Practices for Water Quality Protection
Sediment Basin
(NRCS Conservation Practice Code 350)
Perf.
Riser
D
D
m
Daaam
m
Basin
Spillway
DEFINITION
A basin constructed to collect and store soil sediment and prevent excessive sediment runoff into
receiving surface waters.
PURPOSES
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Capture significant excess sediment originating on farmed lands.
Minimize potential entry of sediment and attached nutrients to surface waters.
Optimize the efficacy of erosion control practices on newly developed or replanted vineyards and
orchards.
CONDITIONS
Temporary or permanent sediment basin installations will be constructed, as appropriate to augment
erosion control practices on lands where recently disturbed soils pose a potential to exceed acceptable
soil loss standards. Sediment basins will be designed and sited in appropriate terrains to optimize
sediment trapping efficiency where eroded soils pose potential to leave the site and enter surface
waters or neighboring lands. Applications will related mostly to lands over 5% slopes, or situations
where excessive sediments may concentrate. The Napa County Conservation Regulations guidelines,
as prescribed by the NRCS and Napa Co RCD will be followed in the design and siting of basins.
TECHNICAL RESOURCES:
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Napa Co RCD and USDA Natural Resources Conservation Service, Napa County.
NRCS Field Office Technical Guide and NRCS Engineering Handbook.
Qualified Professional Engineers and Certified Soil Erosion & Sediment Control Specialists.