Won’t climate change and increased rainfall impact the tunnel system performance and cause additional overflows? Was this considered? Could the system be constructed and then found to be “too small”?

For compliance with EPA’s CSO Policy and ALCOSAN’s Consent Decree, the tunnel system must be designed to achieve a specific performance level during a typical year rainfall as defined in the CWP. The typical year rainfall is based on historical data, consistent with the EPA’s guidance. While the tunnel is being designed to typical year conditions, the tunnel system will capture additional flows during years with higher than typical year precipitation totals.