Tunnel and Reservoir Project (TARP) - Deep Tunnel
Sector: Waste Processing and Treatment • Location: Chicago, Illinois, United States
Source: NBC 5 Chicago
The Tunnel and Reservoir Project (TARP), also known as the Deep Tunnel, is a decades-long flood prevention effort in the Chicago area. It involves routing excess stormwater and sewage through deep tunnels into regional reservoirs for storage and treatment, preventing flooding and protecting Lake Michigan's water quality. The project has been ongoing for over 50 years with an estimated cost of $3 t
- Status
- Under Construction
- Sector
- Waste Processing and Treatment, Tunnel, Water Supply and Storage
- Location
- Chicago, Illinois, United States of America
- Updated
- 22 Jul 2026
- Source
- NBC 5 Chicago
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Project Information
Participants
| Not available for this record. |
Status
Original status | under construction |
Taiyo status | Under Construction |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | The Tunnel and Reservoir Project (TARP), also known as the Deep Tunnel, is a decades-long flood prevention effort in the Chicago area. It involves routing excess stormwater and sewage through deep tunnels into regional reservoirs for storage and treatment, preventing flooding and protecting Lake Michigan's water quality. The project has been ongoing for over 50 years with an estimated cost of $3 to 4 billion. The system includes reservoirs like McCook and Thornton, which are currently at or near capacity due to heavy rainfall in 2026. Additional reservoir capacity is being built in McCook to store six billion more gallons of water in the coming years. |
Original sector | Water Management |
Budget |
Location
Country | United States of America (USA) |
State | Illinois |
City | Chicago |
Source
Source | NBC 5 Chicago |
URL |
More Details
Record type | Project |
Sector | Waste Processing and Treatment, Tunnel, Water Supply and Storage |
Article published date | 2026-07-10 |
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