Wikipedia has announced a contest to select photos of monuments or historic districts and their list for DeKalb County includes the Decatur Water Works. We note, btw, that this Wikipedia article links to the "Early history" section of this website. After registering, click the "upload photo" button next to the Decatur Water Works listing to get your photo into the game. Here's the official record in the National Register.
"Wiki Loves Monuments USA is a photo contest on Wikipedia and Wikimedia Commons that will run throughout September, 2012. It is part of an international Wiki Loves Monuments competition organized by the Wikimedia Community in over 30 countries.
In the U.S., the contest will focus on sites on the National Register of Historic Places (NRHP), which have been organized on Wikipedia by state and county.
To get started, you’ll need to set up an account on Wikimedia Commons and then find the historic sites in your area...."