An earth embankment or a combination ridge and channel constructed across the slope of minor watercourses to form a sediment trap and water detention basin with a stable outlet.
How it helps
Basins help improve water quality by trapping sediment on uplands, preventing it from reaching downstream water bodies.
Structures reduce gully erosion by controlling water flow within a drainage area.
Basins reduce and manage on-site and downstream runoff.
Grass cover may provide habitat for wildlife.
Planning ahead
Is the site too steep for the basin to work properly or be economically feasible?
Will the basin be part of an existing terrace system?
Is sheet and rill erosion controlled by another conservation practice?
Can adequate outlets be provided?
Tech Notes
The uncontrolled area draining into the basin must not exceed 50 acres.
Build the basin large enough to control runoff from a 10-year storm without overtopping.
Install an outlet that will convey water to a point where it will not cause damage.
Use fill material free of sod, roots, frozen materials, and stone larger than six inches in diameter. It should also have correct moisture content for adequate compaction.
Spacing for water and sediment control basins depends on the land slope, tillage and management system.
Maintenance
Re-seed and fertilize as needed to maintain vegetative cover.
Check the basin after each large storm and make any needed repairs.
Inspect the outlet to ensure it is not damaged or plugged. Repair any damaged parts and remove trash buildup around the inlet.
