Headwall

Definition

A Headwall is a wall, usually constructed of concrete or masonry, that is placed at the outlet side of a drain or culvert to protect fill from scouring or undermining, or to divert flow.

Purpose

Headwalls are used to prevent erosion and structural damage by stabilizing the area around the outlet of a drain or culvert. They help manage water flow, protecting surrounding soil and structures from water-related damage and ensuring the longevity and functionality of drainage systems.

Examples of Use

1. Culvert Outlets: Protecting the exit point of a culvert from erosion caused by water flow.
2. Drainage Ditches: Stabilizing the outlet of a drainage ditch to prevent undermining of the surrounding soil.
3. Stormwater Management: Used in stormwater management systems to control the flow and direction of water.
4. Irrigation Systems: Ensuring the proper exit of water from irrigation channels without causing damage to the surrounding land.

Related Terms

• Culvert: A tunnel carrying a stream or open drain under a road or railway.
• Retaining Wall: A structure designed to hold back soil or water.
• Erosion Control: Practices used to prevent soil erosion.
• Drainage System: A system of pipes and channels designed to carry away excess water.

Notes

Headwalls must be properly designed and constructed to handle the expected water flow and prevent erosion effectively. Regular inspections and maintenance are necessary to ensure they remain functional and effective over time.