... maybe you missed .. " The pit would be nearly as deep as the Grand Canyon. The pit, tailings dams of processed ore, and waste rock piles would cover an area larger than Manhattan.

"The Pebble deposit, north of Iliamna Lake, is in the watersheds of two major salmon rivers, the Nushagak and the Kvichak, which together support about a quarter of the world’s wild sockeye salmon, according to EPA."  
EPA should have given him billboards and Superbowl ad time to get the word out!!