The 20 ft long bridge over a brook at the end of my road needed replacing.
Start - Erect 8 ft chainlink fence across the road to block traffic.
Start + 6 weeks - Begin tearing out the old bridge.
Start + 14 weeks - start building a new bridge on the old piers.
Start + 21 weeks - Pour concrete.
Start + 25 weeks - start building guardrails and approach curbs.
Start + 28 weeks - Open new bridge 8 ft narrower than either road approaching it.