Dirt has to be dug up to build the on/off ramps. The ponds are a result of the dirt being removed. That's why you see them near the ramps and not elsewhere.
Forum: Questions and Answers (Q&A)

Another image. <a href="http://www.flickr.com/photos/chicagodom/1046027988/" title="Third Ward: Gladys Luncheonette by ch¡cagodom, on Flickr"><img src="http://farm2.static.flickr.com/1352/1046027988_f3576b9af2.jpg" width="500" height="375" alt="Third Ward: Gladys Luncheonette" /></a>
Forum: General Discussion