For another Chicago example, there's the Tunnel and Reservoir Plan, a/k/a TARP (not to be confused with the 2008 Global Financial Crisis project with the same initialism).
The Chicago TARP was commissioned in the 1970s and won't be completed until 2029. It's cost > $3 billion to date.
The Chicago TARP was commissioned in the 1970s and won't be completed until 2029. It's cost > $3 billion to date.
<https://en.wikipedia.org/wiki/Tunnel_and_Reservoir_Plan>