Dry swales, often known as “running bioretention”, are a great way to reduce runoff and maximize pollutant removal within the existing stormwater conveyance system. They can usually be applied in any open channel or road right of way (if it lacks curb and gutters).

To find design specifications, inspection and maintenance guidance and other cool resources, check out the links below:

Design Specifications:

Dry Swale
Design Specification: Dry Swale
Design Specification: Wet Swale

Inspection and Maintenance:

Guidance for inspection and maintenance of bioswales is included in Bioretention Illustrated:

Technical Bulletin No 10: Bioretention Illustrated!

Improving Performance:

Download “Performance Enhancing Devices for Stormwater Best Management Practices: Final Report” APRIL-26-FINAL-PED-DOCUMENT.pdf – Downloaded 288 times – 1 MB

CSN Webcasts:

[Webcast] Advanced Stormwater Design: Grass Swales and Channels

[Webcast] Advanced Stormwater Design: Bioretention and Dry Swales

[Webcast] Visual Indicators Part II: Filter Strips and Grass Channels

[Webcast] Other Perspectives on Research on LID Performance Enhancement

Other Resources:

Download “Grass Swales Inspection Field Cheat Sheet” Swale-Maintenance-Triggers.pdf – Downloaded 65 times – 105 KB

Download “Mosquitoes and Bioswales” Mosquitos20in20DE20Bioswales1.pdf – Downloaded 1127 times – 616 KB