flipping thru the local history book which has a lot of info on this lake , according to there was a lot of different things located in the area which is now the park .

it indicated there were a couple small sawmills but they disappeared by the 1880's , soon after boathouses appeared and a boat livery ( which later became a small marina but which is now gone from the lake ) , also talks about a small power plant being located nearby

although from looking at the older pictures in book there doesn't appear to be anything in the exact spot where I've been finding the old bottles so perhaps it was a dump site ? or some trash was dumped there at some point but does appear to have been a very busy location over the years