After 40 years, Chicago’s Deep Tunnel project is complete

After 40 years, Chicago’s Deep Tunnel project is complete
WBEZ/Andrew Gill
After 40 years, Chicago’s Deep Tunnel project is complete
WBEZ/Andrew Gill

After 40 years, Chicago’s Deep Tunnel project is complete

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.