July 12 Storm Update
As rain continues to fall throughout the Chicagoland area, the Metropolitan Water Reclamation District of Greater Chicago’s (MWRD’s) Tunnel and Reservoir Plan (TARP), which is comprised of three systems, is operating as designed.
Combined, the tunnels and reservoirs are holding more than 6.07 billion gallons of water. The current status of all TARP tunnels and reservoirs includes:
Kirie TARP Status
The Kirie TARP system is comprised of the Kirie Tunnel and Majewski Reservoir.
Kirie Tunnel is 4% full = 2.75 Million Gallons (MG)
Majewski Reservoir = 0% full
McCook TARP Status
The McCook TARP system is comprised of the Mainstream Tunnel, Des Plaines Tunnel, and McCook Reservoir.
Mainstream Tunnel is 67% full = 803.6 MG
Des Plaines Tunnel is 16% full = 64 MG
McCook Reservoir is 90% full = 3.23 Billion Gallons
Calumet TARP Status
The Calumet TARP system is comprised of the Calumet Tunnel and Thornton Composite Reservoir.
Calumet Tunnel is 75% full = 470 MG
Thornton Composite Reservoir is 19% full = 1.5 Billion Gallons
Before severe storms, the MWRD lowers the levels of the Chicago Area Waterway System. We are working around the clock to manage the excess water coming into our seven water reclamation plants. We encourage the public to reduce their use of water during rain events; wait to run the dishwasher, shower and/or do the laundry.