A Puddle Or Navigable Water?

"For the past 15 years, the EPA and the Army Corps of Engineers have regulated nearly every stray puddle in [Illinois]because they just might become a habitat for migratory birds that crossed state lines. Their rulemaking was derisively called the "glancing geese" test, meaning that if a migrating bird even glanced at a water-filled pothole it became part of interstate commerce. Roughly 100 million acres became subject to federal control -- including the gravel pit near Skokie."

Thanks to Chris Steins