Army Corps accepts appeal from developer of proposed Pebble mine but rejects Alaska’s appeal Print article The U.S. Army Corps of Engineers has accepted an appeal request from the developer of the proposed Pebble copper and gold mine in Southwest Alaska, keeping alive the company’s hopes that it could one day see the project developed after the Corps denied the project a key permit last year. The Corps also rejected the state of Alaska’s request for an appeal, prompting a response from Gov. Mike Dunleavy, who said that the rejection sets a precedent that could put other projects on state land at risk.