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      • Begun in 1975, and at one time the nation's largest municipal water pollution control project, it involves the construction of 109 miles (174 kilometers) of tunnels 9 to 33 feet (3 to 10 meters) in diameter excavated in dolomitic limestone bedrock as much as 350 feet (107 meters) below the surface.
      www.encyclopedia.chicagohistory.org/pages/367.html

      Deep Tunnel - Encyclopedia of Chicago

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  3. www.encyclopedia.chicagohistory.org › pages › 367Deep Tunnel - Encyclopedia of Chicago

    The $4 billion Tunnel and Reservoir Plan (TARP), better known as “The Deep Tunnel,” is the Metropolitan Water Reclamation District of Greater Chicago's answer to water pollution and sewer backup problems in 52 municipalities in Cook County.

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      Deep Tunnel System, 2003 (Map) A 1972 federal law required...

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  4. en.wikipedia.org › wiki › Tunnel_and_Reservoir_PlanTunnel and Reservoir Plan - Wikipedia

    The Tunnel and Reservoir Plan (abbreviated TARP and more commonly known as the Deep Tunnel Project or the Chicago Deep Tunnel) is a large civil engineering project that aims to reduce flooding in the metropolitan Chicago area, and to reduce the harmful effects of flushing raw sewage into Lake Michigan by diverting storm water and sewage into ...

  5. mwrd.org › what-we-do › tunnel-and-reservoir-plan-tarpTunnel and Reservoir Plan (TARP) - MWRD

    The MWRD’s Tunnel and Reservoir Plan, also known as TARP or “The Deep Tunnel,” is a system of deep, large diameter tunnels and vast reservoirs. TARP is designed to reduce flooding, improve water quality in Chicago area waterways and protect Lake Michigan from pollution caused by sewer overflows.

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  7. www.chicagoriver.org › about-the-river › tunnel-andTunnel and Reservoir Plan - About the River - Chicago River

    The Tunnel and Reservoir Plan (TARP), also known as "The Deep Tunnel," is the Metropolitan Water Reclamation District’s (MWRD) large scale engineering project designed to reduce flooding and combined sewer overflows (CSOs) within the MWRD’s service area including the Chicago River watershed in Cook County, an area that includes Chicago and ...

  8. www.chicagomag.com › city-life › december-2011Deep Inside Chicago's Deep Tunnel – Chicago Magazine

    Dec 15, 2011 · The Feds and the state get impatient with Deep Tunnel, forcing the state into an agreement to get it done on time—by 2029. Here's how it's (sort of) responsible for the Asian carp crisis, and...

  9. mwrd.org › sites › defaultMetropolitan Water Reclamation District of Greater Chicago ...

    9 billion gallon Thornton Reservoir, part of the Calumet TARP system.The Tunnel and Reservoir Plan (TARP), also known as “Deep Tunnel,” is a system of deep, large diameter tunnels and vast reservoirs designed to reduce flooding, improve water quality in Chicago area waterwa.

  10. mwrd.orgTARP at 50: How one of the world’s largest public ... - MWRD

    Known famously today as “Deep Tunnel,” the MWRD’s system is unmatched in size throughout the world but emulated just the same. The TARP system is comprised of four large tunnels constructed 150 to 300 feet below ground to convey water by gravity into three mega reservoirs.