https://www.washingtonpost.com/amphtml/national/health-science/in-reversal-epa-deals-setback-to-controversial-gold-mining-proposal-in-alaska/2018/01/26/75d73aae-0206-11e8-bb03-722769454f82_story.html?utm_term=.adad0a2fdf6b&__twitter_impression=true

“Southwestern Alaska contains a reservoir of gold worth an estimated $120 billion. The lakes and tributaries in the region feed into Bristol Bay and a fishery that generates $500 million a year.“