SPRINGFIELD, Ill. (AP) — Springfield officials are moving forward with a project to recycle rainwater runoff.

The Springfield Journal-Register reports (http://bit.ly/1oGbVkb ) bidding is set to begin Thursday for the water reuse and bioswale project. A bioswale is a shallow ditch that uses special soil to filter pollutants out of water.

Springfield's public works director says officials hope to finish the project by the end of the year. They say it will help keep toxins out of the city's sewer system and will limit sewer backups from rainwater entering the system. The city will used recycled runoff to water plants downtown and to clean sewer lines.

A $600,000 Illinois Green Infrastructure Grant is expected to cover most of the project costs.

The state Environmental Protection Agency will review acceptable bids.

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Information from: The State Journal-Register, http://www.sj-r.com