Addendum to Phase I Archaeological Survey of the Proposed Widening of SR 9

For this environmental study, Project STP-1336(11) would begin at the intersection of SR 141 and SR 9. Actual design and construction of the proposed project would begin 1,000 feet north of this intersection near Pendley Road. The intersection of Pendley Road and SR 9 would be realigned from a skewed intersection to a near-90 degree angle. This would improve the safety of the intersection. As the project continues north, the intersections of SR 9 with Lexington Lane and Highland Gate Drive also would be realigned for safety. A new traffic signal would be installed at the intersection of Piney Grove Road and SR 9 to accommodate the projected traffic volumes. The proposed project continues north with the realignments of the road's intersections with Valley Hill Circle South and North (to improve safety) and horizontal curvature realignments near Old Atlanta Road. Roadway elevation adjustments would be made just after the intersection with Old Atlanta Road to meet design guidelines for a 45-mile-per-hour facility. The project ends with the modification of the traffic signal at Buford Highway (SR 20) and then tapers to the meet the existing three lane roadway. Turn lanes would be added to side roads along the project alignment where necessary. The project design and construction length is approximately 2.82 miles. To avoid impacts to resources and improve the geometry along the roadway, the proposed alignment varies between symmetrical and asymmetrical widening. The widening would begin symmetrically before Pendley Road and move west after the intersection to avoid a manufacturing facility. After moving east to avoid a long-standing shopping area, the alignment would move back to existing centerline near Redi Road. From Redi Road to Valley Circle Road North, the widening would be symmetrical. The alignment would then move west to avoid the earthen dam for a large pond just past Valley Circle Road North. To improve the horizontal alignment of the roadway, the widening would shift east of the existing centerline until Old Atlanta Road. The widening from Old Atlanta Road to SR 20 would shift west to avoid a gas station and then shift back to existing centerline to symmetrically taper down to three lanes beyond the SR 20 intersection.