>> Hydrogeologists use a variety of dyes or other water additives that are better suited for this, and it doesn't seem to have worked yet. The one thing the a

>> Hydrogeologists use a variety of dyes or other water additives that are better suited for this, and it doesn't seem to have worked yet. The one thing the article failed to mentioned is the possibility they have no idea where to look for the dye to be coming out. It's easy to do this on an island (such as the famous Oak Island), not so easy at Kettle Falls where this waterfall is quite a ways inland and the only logical outlet would either be the Brule River, or a deep cavern that leads to the coastline of Lake Superior. Add in the fact in some areas the lake can be as deep as 1,300 feet, and you've got one hell of a hard time trying to find out where the water goes.