There is a bridge being replaced on the Illinois river at Peoria It is expected it will open this coming fall after 5 1/2 years of construction. They were hopping to have the bridge open in 4 years, but Covid caused some delays. That didn’t include bidding and design time..
This is exactly the reason why when adding 9 months to any project for unexpected delays, add an additional 9 months for UNEXPECTED unexpected delays...