They're expected to produce between 1 - 2 million gallons of water daily. Two will discharge into Lake Decatur while the other two will go into the city's water mine.
The cost will be about $1.5 million. Officials say Lake Decatur is still nearly two feet below normal.
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.