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Underground Outlet
How it works
Underground is a pipe installed beneath the surface of the earth in order to collect and channel surface water underground
to a suitable, stable outlet. Underground outlets are often used in terraces, water and
sediment control basins, diversions, waterways, and surface drains.
How it helps
- Reduces surface flow over areas susceptible to high rates of erosion and gully action.
- Helps stabilize critical areas and contributes to the function of other practices.
- Improves water quality by reducing sediment and nutrient loss.
Link to NRCS Standards & Specifications
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