![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/menintunnel_s.jpg)
Workers in the deep tunnel
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Mainstream_Pumping_Station_s.jpg)
Mainstream Pumping Station located 350 feet below ground
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/menclimbinguptomach_s.jpg)
Tunnel Boring Machine face reaches underground cavern
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Thornton_in_2008_flooding_smlr_s.jpg)
Thornton Transitional
Reservoir (after a storm)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/mccook_reservoir_s.jpg)
McCook Reservoir
(under construction)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/OHare_CUP_Reservoir_s.jpg)
Gloria Alitto Majewski
CUP Reservoir
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Future_Site_Thornton_Reservoir_s.jpg)
Future site of the Thornton Composite Reservoir (under construction)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Connecting_Tunnel_Thorton_s.jpg)
Connecting Tunnel of the Thornton Composite Reservoir (under construction)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Gap_Dam_Thorton_s.jpg)
Gap Dam at the Thornton Composite Reservoir (under construction)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/15-1204_0046_s.jpg)
Thornton Composite Reservoir took water for the first time the night of Thanksgiving 2015. |
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/15-1204_0197_s.jpg)
Thornton Composite Reservoir can hold up to 7.9 billion gallons of water preventing flooding and pollution in local waterways.
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/15-1204_0632_s.jpg)
The Thornton Composite Reservoir is so large it could contain six Solder Field stadiums on top of six Soldier Field stadiums.
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/15-1204_0314_s.jpg)
Thornton Composite Reservoir protects the Far South Side of Chicago and 13 surrounding suburbs from flooding.
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/McCook_s.jpg)
Crews are working to have the first phase of McCook Reservoir in service in 2017 to hold 3.5 billion gallons of water.
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/Gap_Dam_Thorton_s.jpg)
Gap Dam at the Thornton Composite Reservoir (under construction)
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/McCook_tunnel_s.jpg)
The McCook Reservoir in the background will connect to the Mainstream Tunnel System.
|
![](/irj/go/km/docs/documents/MWRD/internet/protecting_the_environment/Tunnel_and_Reservoir_Plan/photo_gallery/images/16-0630_2112_s.jpg)
The McCook Reservoir will hold a combined 10 billion gallons of water between two phases of construction, and benefit 3.1 million people in 37 communities.
|
|