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File:Target Center Arena Green Roof 3 Minneapolis, MN.jpg|alt=image of target center green roof, Minneapolis, MN|Green roof (Image Courtesy of The Kestrel Design Group, Inc.) | File:Target Center Arena Green Roof 3 Minneapolis, MN.jpg|alt=image of target center green roof, Minneapolis, MN|Green roof (Image Courtesy of The Kestrel Design Group, Inc.) | ||
File:Sand infiltration 4.jpg|alt=photo of an iron ehanced sand filter basin|Iron enhanced sand filter (Photo courtesy of Barr Engineering) | File:Sand infiltration 4.jpg|alt=photo of an iron ehanced sand filter basin|Iron enhanced sand filter (Photo courtesy of Barr Engineering) | ||
+ | File:Vegetated swale city of Wayzata.jpg|alt=Photo of vegetated swale city of Wayzata|Vegetated swale | ||
</gallery> | </gallery> |
A structural stormwater 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".