Friday, February 3, 2012

319 Grant Update - Ashley Street Bioswale Done!

Construction of the bioswale on Ashely Street is complete, just in time for a rainfall event!

What’s the difference between the before and after?  It’s all in what you DON’T see.  Much of the existing materials were excavated and replaced with an engineered soil mix.  The soil mix will filter the stormwater runoff from smaller storms, removing sediment, oil, grease, and excess nutrients.  Most of our rainfall events are smaller storms, therefore most of the runoff will be treated.  Runoff from large events will flow into the area inlet.  Native grass seed was sown in the bioswale.  Native grasses are more suited to the Missouri weather extremes.  Additionally, native grasses tend to be more deeply rooted encouraging infiltration and filtration of the runoff. 

BEFORE - Bioswale on Ashley Street prior to reconstruction

Excavation of existing material and reconstruction of area inlet.

Public Works Stormwater Crew placing rock in flowline on top of engineered soil mix.
AFTER - Bioswale on Ashley upon completion.
 We'll post more photos when the grass comes in!

 US Environmental Protection Agency Region 7, through the Missouri Department of Natural Resources, has provided partial funding for this project under Section 319 of the Clean Water Act. (G11-NPS-12).