Another Vermont covered bridge that has been closed since being damaged by flooding from Tropical Storm Irene two years ago is set to reopen, this one linking Taftsville, Woodstock, and Quechee. After $2.5 million in repairs, the Taftsville Covered Bridge is scheduled to reopen Sept. 6. ‘‘It’s going to be huge,’’ said Taftsville Country Store co-owner Courtney Brooks, whose business has seen a 30 percent to 40 percent drop in business since the Aug. 28, 2011, storm. ‘‘We are going to welcome all of our friends back.’’ The flood waters of the storm made the bridge, just off US Route 4, unusable. The original 189-foot, two-span Taftsville bridge was built in 1836. It was one of 13 covered bridges damaged by Irene.