TIMELAPSE: Turning the Chicago River Green

Published 03/17 2014 12:45PM

Updated 03/17 2014 12:52PM

CHICAGO, IL -- The waterway was "greened" this weekend for the annual city-wide celebration.

This timelapse video, uploaded to YouTube, shows this year's process, sped up to a matter of seconds from beginning to end.  Take a look!

They've been doing it for decades but you may be interested to know, it's not really dye that develops that signature green hue - it's a chemical reaction with a substance usually used to detect leaks.  Read more about the history here.

Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

Featured Business