(Portland, OR) -- The State of Oregon is taking public comments on draft rules for a proposed gold mine in Malheur County. The Grassy Mountain Gold Mine would be underground and cover 470 acres. It's located 22 miles south of Vale. It would be Oregon's first chemical-process gold mine. Cyanide is used to extract the gold from the ore. Silver would also be mined and together they would generate one-point-three-billion-dollars over ten years. Comments are being taken on the Oregon Department of Geology and Mineral Industries' website through February 6th.