Chicago Tunnel & Reservoir and Underflow Plans

Lieutenant Colonel Kevin LovellUS Army Corps of Engineers,

Chicago District

Global Infrastructure Leadership Conference

BUILDING STRONG®

Agenda Chicagoland drainage history before TARP Development TARP Phase I Development TARP Phase II Current Progress Questions

Mission: Provide valued, world class leadership, engineering services, and managementfor diverse stakeholders and partners in the Chicago-land metropolitan area.

US Army Corps of Engineers Chicago District

5,000 Sq. Mi.; 9.1 Million people

3

Great Lakes andOhio River Division

McHenry Lake

Kane

CookDuPage

Will Lake Port

er

LaPorte

Before Canal Excavation(1900)

AfterCanal Excavation(1922)

US Army Corps of Engineers

Phase ITunnels

US Army Corps of Engineers

TARP Goals

• Protect ……… Lake Michigan from River Backflows

• Eliminate …… Waterway Pollution Caused by CSO

• Provide ……... An Outlet for Flood Waters to Reduce Basement Sewage Backups

• Comply ……... With Federal and State Environmental Laws

• Accomplish ... The Above Results in the Most Cost Effective Manner

Local Sewer

TARP Tunnel

MWRDGCInterceptorSewer

• Phase I (Pollution Control)109 miles of deep tunnels 250 drop shafts600 Surface Connecting

StructuresCompleted in March 2006

• Phase II (Flood Control)3 large reservoirs

• Gloria Alitto Majewski• Thornton Composite• McCook

TARP

US Army Corps of Engineers

Phase II Reservoirs

US Army Corps of Engineers

TARP Reservoir

Planned TARP CSO Storage Volume

*1972 - Clean Water Act enacted. TARP program adopted by MWRDGC.

**1975 - TARP tunnel construction initiated

TARP Reservoir Storage

TARP Tunnel Storage

0.07 BG

17.5 BG

11.0 BG

7.5 BG

2.7 BG2.5 BG1.6 BG1.3 BG

01

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10111213141516

1718

Year

TAR

P St

orag

e Vo

lum

e (B

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allo

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Gloria Alitto Majewski ReservoirCompleted 1998

Volume = 350 Million Gallons

Thornton Composite ReservoirCompleted 2015

Volume = 7.9 Billion Gallons

McCook ReservoirUnder Construction

Stage 1 online 2017 (3.5 Billion Gallons)Stage 2 online 2029 (6.5 Billion Gallons)

HOW BIG IS THE McCOOK RESERVOIR?Large enough to house 11 Soldier Field’s within the

perimeter.

Description Status Cost EstimateGrout Test Complete $5,418,000

Groundwater Cut-Off Wall, Stage 1 Complete $10,959,000

Addition of Pumps and Motors Complete *$11,700,000

Distribution Tunnel System Under Construction $59,400,000

Groundwater Cut-Off Wall, Stage 2 Complete *$9,300,000

Grout Curtain, Stage 1 Complete *$39,106,000

Grout Curtain, Stage 2 Complete *$53,200,000

Misc. Surface Features, Stages 1 & 2 Future $17,040,000

Main Tunnels Under Construction *$55,865,000

Inlet Structure Under Design $8,765,000

Misc. Floor Features, Stages 1 & 2 Future $8,831,000

Aeration, Stages 1 & 2 Future $9,000,000

Rockwall Stability, Stages 1 Advertised $5,097,000

Rockwall Stability, Stage 2 Future $5,287,000

Expanded Stage 2 Incremental Costs Future $41,600,000

Engineering and Management In-Progress $82,850,000

TOTAL = $423,418,000

Note: All Army Corps Contracts are Subject to Their Disadvantaged Business Program

ARMY CORPS RESPONSIBILITIES

Description Status Cost EstimateLand - Decommissioning Lagoons Complete $8,250,000Conveyance Tunnel Complete $5,591,000Site Preparation Complete $889,000Willow Springs Berm Complete $3,274,00073rd Street Tunnel Relocation Complete $15,132,000

Overburden RemovalUnder

Construction $59,847,000Vulcan Conveyance System and Maintenance Facilities

Under Construction $31,441,000

Furnish and Deliver Mining Equipment In-progress $18,931,000Stages 1 and 2 Mining Future $54,696,000Expanded Stage 2 Overburden Removal Complete *$27,000,000

Expanded Stage 2 Mining Future $8,200,000TOTAL = $233,251,000

METROPOLITAN WATER RECLAMATION DISTRICT RESPONSIBILITIES

BUILDING STRONG®

• Des Plaines Inflow Tunnel ($100M) Tunnel Shaft, Gates & Connection

• McCook Reservoir PH 1 Completion

• McCook Stage 2 Congressional Funding• Wall Stabilization, Tunnel to connect Stage 1 & 2

TARP Next Steps