The construction of a series of stormwater ponds to collect and treat runoff from phase two of the Silver Line is underway.
A spokesperson for the Dulles Corridor Metrorail Project says that four of the 15 stormwater management facilities along the extension project have been completed.
The largest facility is wetlands constructed near the county’s garage south of Herndon Station.
The extension project implements new stormwater management standards to treat runoff and remove pollutions, according to Stephen Barna, the project’s engineering director.
“The project elected to adopt the new standards for the benefit of the public,” he said.
Here’s more from the Dulles Corridor Metrorail Project on the projects:
They have varying features from dry swales with specialized filters to manmade wetlands that contain multiple bioretention pools to treat stormwater flow.
While the stormwater management facilities in Phase 1 were designed primarily to prevent flooding, the ones that were built in Phase 2 were designed to also remove pollutants while retaining runoff.
Special grasses and plants are planted within the Phase 2 ponds, while locally appropriate trees.
Photo via Dulles Corridor Metrorail Project
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