Grade Control Structure
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Controlling Water Flow
A structure build across a drainage way or gully to control and reduce water flow. Can be earthen, wooden, concrete, or made of other materials.
Description
These structures drop water from on stabilized grade to another to prevent gullies from advancing up a slope.
Benefits
- A grade control structure is often used to stabilize the outlet of a waterway, preventing gully erosion.
- Grassed, non-eroding waterways with a grade control structure improve water quality, can be crossed with equipment, and defend against gully formation in areas with severe erosion issues.
- If it is planned to retain water, a grade control structure will trap nutrients and sediment and may provide a water source and habitat for wildlife.
Planning
- Are adequate conservation practices installed above the structure to reduce erosion and sedimentation?
- Is the planned location in the proper place to achieve the level of control needed?
Tech Notes
- Work with our office to establish this practice.
- Obtain necessary permits or authorization before construction.
- Remove all trees and shrubs within 30 feet of the structure.
- Clear debris approximately 50 feet downstream from the spillway outlet.
Maintenance
- Keep burrowing animals off earthen structures.
- Repair cracks in concrete.
- Keep outlets free of debris.