Why Rain Gardens?

A rain garden is a planting bed within a shallow depression where water is diverted from your impremeable surfaces (typically your roof or driveway).  They are built to capture rain water and filter it before it can reach the storm water / sewage system.  Rain Gardens mimic the natural system of rain water slowly seeping through the soil and recharging the ground water before making its way back to streams and rivers.

Rain Gardens can help prevent urban flooding and reduce overflow of untreated water from going into our rivers.  Although the recent Big Pipe project in Portland has reduced much of our storm water and untreated sewage waste from overflowing into the Willamette River, this still happens about four times a year.  The more rain we can keep out of the system, the less overflow we will have and the better for our environment and our rivers.