Georgia angler Travis Harrell made a long, 150-foot cast across the swift current boils and whitewater of the Flint River. It was March 19, Harrell was fishing from shore, and water was pouring out of the tailrace below the hydroelectric dam that forms Lake Chehaw. Harrell’s 2-ounce pink bucktail jig, adorned with an 8-inch long Got-Cha white plastic grub, landed on the far side of tailrace current flow. Then he started another lure retrieve. “T…