A host of conservation organizations–including Trout Unlimited, Sportsman’s Alliance for Alaska, and Orvis–has been working for years to stop construction of the Pebble Mine project, which would see the construction of the world’s largest copper and gold mine at the headwaters of the last great wild salmon run in the Bristol Bay region of Alaska. Throughout the debate, the Pebble Limited Partnership has claimed that our fears are unfounded because technological advances will allow them to build this monstrous extraction operation without affecting nearby streams and lakes, which are the spawning grounds for millions of sockeye salmon. This recently released video shows what happens when you fact-check some of these claims. The results are disturbing at best and cast doubt on the viability of the whole operation. To help stop Pebble Mine, visit the Orvis Take Action page.