Mason District Pond, Follow the Progress 2

(Conservation Currents, Northern Virginia Soil and Water Conservation District)

Construction Starts at Mason District Park Pond

The official groundbreaking took place on April 12, 2003. Fairfax County Supervisor Penny Gross (Mason District), Gerry Connolly (Providence District), and Chairman Kate Hanley were joined by Park Authority Board members and staff to mark the occasion.

official groundbreaking
Supervisor Penny Gross
project sign

Environmental Quality Resources, LLC, (EQR) the contractor for the project, lays an 18-inch rock base for a new earthen dam. The dam will stand 11 feet high from the pond bottom. The depth of the pond will be six feet, The new pond design will help control stormwater runoff from the 56 acres of drainage area above it, resulting in reduced downstream erosion and pollution.

rock base of dam
measuring dam base
digging new pond

On May 29, a crane was used to lift and move a 31-ton stormwater management inlet box. The structure measures 8 feet by 16 feet and will sit on a gravel leveling pad in the pond, about 4 to 5 feet from the dam. The front of the structure has a gate valve on the lower right, which will remain closed, except when the park manager needs to open it for pond drainage or maintenance. From the small hole on the upper left side of the box, a 6-inch diameter low-flow PVC pipe (not yet installed) will pull cooler baseflow from the lower area of the pond to mix with the warmer surface water. If the water that drains from the pond is too warm, it will threaten the aquatic life in the receiving stream.

back view of inlet box on truck
moving and turning inlet box
setting inlet box in place-front view

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