Ketjun historia

I want to know more about this lake, I heard that there is mining work nearby the area, what type of chemicals that reach the lake? do you have any ratios or tables for them? And what about the natural life in the lake, what type of fishes? type of planktons, algeas, crustacean, clams...etc. Are there any published studies about the lake, any information that you can provide of different types of the site and the nature around it?