Structural stormwater Best Management Practices

In a watershed scale stormwater management approach, structural BMPs are used for on-site and regional treatment and after prevention and source control BMPs have been employed. Source:CDM Smith.

A structural stormwater Best Management Practice (BMP) is defined in the MS4 General permit as "a stationary and permanent BMP that is designed, constructed and operated to prevent or reduce the discharge of pollutants in stormwater".

1. Green roofs (+)
2. Permeable pavement (+)
3. Trees
4. Bioretention (+)
   1. Rain garden: see Bioretention
5. Infiltration (infiltration trench, basin, dry well, and underground infiltration)
6. Filtration (+)
   1. Dry swale (Grass swale)
   2. Wet swale (wetland channel)
   3. High-gradient stormwater step-pool swale
   4. Sand filters
7. Iron enhanced sand filter (Minnesota Filter) (+)
8. Stormwater ponds (+)
9. Stormwater wetlands (+)
10. Hydrodynamic devices
11. Filtration devices
12. Chemical treatment
13. Modular treatment wetlands for stormwater management

To view all pages for a particular BMP, click on "+"

• Examples of structural BMPs.
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  Bioretention (rain garden)

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  Permeable pavement

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  Green roof (Image Courtesy of The Kestrel Design Group, Inc.)

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  Iron enhanced sand filter (Photo courtesy of Barr Engineering)

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  Vegetated swale