LOUISVILLE, Ky. (WDRB) -- It's the new green way to remove pollutants that often end up in local creeks and streams during heavy rain storms.
The new drainage system -- the bioswale -- will be on display at next month's annual Homearama, sponsored by the Building Industry Association of Greater Louisville, formally known as the Home Builders Association.
This year's Homearama will be held at the Shakes Run neighborhood in Eastern Jefferson County, several miles south of U.S. 60 near Eastwood.
At first glace it looks like some kind of fancy hillside rock garden, but it is much more than that.
"It's called a bioswale," said Rocky Pusateri of Elite Homebuilders.
His company built the latest technology in land development.
A bioswale is a type of man made landscaping designed to remove pollution from storm water runoff in a more natural way by absorption and keeping the pollution out of creeks and streams. It is made up of patches of plants, small trees, and rocks to filter out contaminants.
"We would have a lot less storm water end up in creeks, free of pollution and sand and salt and anything else that is going to come off of the subdivision roads," says Pusateri.
One thing missing on the streets of Homearama this year will be the familiar storm sewer grates.
Explains Tara Brinkmoeller of the Building Industry Association, "We have no storm sewers, no traditional pipe system underneath the roads that would traditionally take the storm water that falls on the site and carries it off to a nearby stream."
Many of Louisville's creeks and streams are polluted.
To reduce such pollution the EPA and MSD are requiring builders and developers to limit the amount of storm water entering the waterways, so the use of this kind of greener infrastructure will become more commonplace in future housing and commercial developments.
"It will help with our water quality," said Pusateri, "it will keep the impurities in these bioswales and keep them out of the creeks and streams."