Fish Lake contains approximately 85,000 trout, an important source of food for local Tsilhqot'in communities. The lake is central to traditional land used for berry picking and hunting. The Council of Canadians is urging the federal review panel to reject the mining project. Environmental groups are prepared to create a legal challenge against Canada's Fisheries Act regulation that allows lakes to be defined as tailing ponds.

Mine tailings contain toxic waste including arsenic, mercury, and lead that can leach into the environment affecting water quality and wildlife habitat. There is a for tailings from this proposed mine to contaminate the Fraser River, site of the largest wild salmon run in North America.

This project (Prosperity Gold-Copper Mine Project) is currently under review through the Canadian Environmental Assessment Agency.