River Hazards: Strainers
A strainer is created by a manmade or natural obstruction such as a tree, root system, fencing, or guard rails.
- An obstruction allows water to pass through but stops and holds objects such as boats and people.
- Bouncing twigs may indicate a partially submerged strainer.
- Vehicles in the water are undercut strainers.
![Tree branches hanging in a river’s path](https://ke-courses-production.s3.amazonaws.com/asset_files/production/2914/attachments/original/wr_strainers.jpg?1559564856)