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Addendum to Archaeological Survey of SR 280 Bridge Replacement over the Chattahoochee River in Cobb and Fulton Counties, Georgia

Author(s)
Report Number
3617
Year of Publication
2006
County
Abstract

Original: The proposed bridge would be constructed east of the existing bridge, at a centerline-to-centerline offset distance of approximately 17 ft. The bridge would be approximately 762 ft long and 88 ft wide and include four 12-ft travel lanes separated by a 20-foot flush median, two 8-foot sidewalks, and two 2-ft gutters. The bridge would also be raised approximately 8.5 feet to meet vertical clearance requirements over railroad tracks. The proposed typical roadway section would be four 12-foot travel lanes separated by a 20-foot flush median, urban shoulders with curb and gutter, and 7-foot sidewalks. The proposed roadway widening would make SR 280 four lanes throughout the area. The proposed right-of-way would be a maximum of 315 feet. Traffic would be maintained on the existing and new bridge via phased construction. The project also involves the construction of approximately 1,310 linear feet of retaining wall at various locations along the east and west sides of SR 280.