AllenOK
Executive Chef
Gretchen said:We have power lakes here that were formed in the 60's. It is unlikely that a bottle older than that would be at the bottom of the lake. Just as my clue about whether it is turning purple due to manganese content of glass prior to about 1923.
There are just a lot of man-made lakes in this country.
It is unlikely, but not impossible. If there was a homestead in the valley over 100 years ago, there is probably a trash dump somewhere, as well as a privy. Bottles would be tossed into each of those. When the river was impounded, and the lake formed, those sites would have been inundated.