PEACHTREE CORNERS, Ga. — The installation of what are known as bioswales finished, allowing the city to help reduce the chance of flooding, slow down runoff and filter pollution on Bankers Industrial Drive.
Officials said the project began as an offshoot of the Georgia Environmental Protection Division’s Nancy Creek Watershed Improvement Plan.
The city took part in the construction because Nancy Creek’s headwaters are inside the city limits near Bankers Industrial.
Peachtree Corners received $400,000 in federal funds through a Section 319(H) award, and also provided a match of $392,749, putting the overall funding close to $800,000.
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The project itself was undertaken in response to what Peachtree Corners official says is a heavily urbanized area that “sheds large volumes of stormwater runoff,” and causes issues with water quality and localized flooding.
In terms of what was done to mitigate those factors, the construction project put 10 linear bioretention cells/bioswales into a 13,000-square-foot along Bankers Industrial Drive.
The bioswales were “installed as a retrofit into the landscaped areas adjacent to parking lots, roadways and/or large rooftops within the existing stormwater drainage system” and work by “infiltrating and treating stormwater” before it can be discharged into the current water system.
The old version of the water system and stormwater infrastructure discharged directly into the Nancy Creek tributary nearby without treatment, as the area was developed before current design standards for state stormwater management were in place.
Officials said the “project is expected to infiltrate approximately four million gallons of runoff per year and provide an effective solution for addressing water quality impacts by addressing runoff reduction and infiltrating stormwater runoff,” or how stormwater and runoff flows into the ground.
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