SAVANNAH, Ga. (AP) — A company's plan to mine minerals just outside the Okefenokee Swamp and its federally protected wildlife refuge moved a big step closer Thursday to approval by Georgia regulators, who have spent years evaluating the project that opponents say could permanently harm an ecological treasure. The Georgia Environmental Protection Division released a draft plan Thursday for how Twin Pines Minerals would operate its proposed mine and mitigate potential impacts to the swamp. The move triggered a 60-day period for public comments before the agency can approve a final plan, which is required for the project to qualify for a mining permit.