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Kroger Park Restoration/Bioswale Project
Constructing the Bioswale
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Constructing the Bioswale 
 
Bioswale Factoids:

The Kroger Park Bioswale was constructed in the summer and fall of 2001. Specifically, a grass swale was constructed to handle the current flows from a 4.4 acre mini-storage site prior to discharging to West Fork Pringle Creek. The grass swale is a total length of approximately 200 feet, a bottom channel width of 6.5 feet, a trapezoidal cross-section with 4:1 (horizontal:vertical) side slopes and a total width of 18.5 feet. Flows from the bioswale entry will be directed from its northeast corner and will travel the full length of the site. Flows from the existing mini-storage site were re-piped to discharge into the swale at two locations along the site's eastern boundary.

Below is a self guided tour through the bioswale construction process. Click on the picture icon to see an enlargement.

Excavation and Grading - The contour of the land is shaped to accept the water and determine the vegetation zones.

Looking up the excavated bioswale Beginning to flatten stream bank

Mechanical installations - The manhole flowsplitter directs the stormwater from the parking lot into the bioswale. The spreader bar helps spread the water evenly into the bioswale channel.

 Flow-splitter manhole Spreader bar and erosion control fabric

Soil preparation - The soil is prepped for better plant growing conditions.

9 spreading soil amendments in bioswale.jpg (382546 bytes)

Temporary Irrigation- Irrigation was installed to ensure vegetation establishment.

Temporary irrigation pipe is laid

Erosion control- The area was hydroseeded to stabilize the soil and control erosion. A fiber matting was installed along the bank where grading had occurred.

Hydroseeding the area Boundary between hydroseeded area and matting Erosion control matting in the swale Applying erosion control matting along Pringle Creek

Plantings- Vegetation is planted in different zones depending on where it is in relationship to the elevation of the water. Upland areas are planted with shrubs and trees. Wet areas (specifically the channel bottom) are planted with grasses, rushes and sedges.

Pins identity plant location Planting along the riparian zone Volunteers at work The littlest volunteer

Current Conditions at Kroger Park Bioswale- Currently the bioswale receives and treats stormwater. Newly planted vegetation is becoming established and is beginning to perform its intended function.

Stormwater flows through the bioswale Vegetation growth increases


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