After 40 years, Chicago’s Deep Tunnel project is complete
By Andrew Gill
After 40 years, Chicago’s Deep Tunnel project is complete
By Andrew Gill
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The Thornton Reservoir is the final stage of the TARP tunnel project. When the former limestone quarry to Chicago’s stormwater runoff system fills, it will add 7.9 billion more gallons of capacity to Chicago’s stormwater runoff system.