Is there any chance of structural damage to homes and buildings above the alignment?
There is no past evidence that tunnel construction in rock formations will cause structural damage to homes and buildings above the alignment. The West Area CSO Tunnel will be excavated through bedrock. The soils that overlie bedrock along the alignment are residual soils, derived from the in-place weathering of the parent bedrock over millions of years. Residual soils tend to be very stable, such that settling is nearly impossible. Also, no settlement problems were reported over the alignment of the existing Atlanta tunnels as a result of tunnel construction.
