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ST. LOUIS - There's a new underground tunnel in south St. Louis.

On Monday a 175-foot tunnel boring machine finished its first new tunnel for the Metropolitan St. Louis Sewer District. The tunnel will help MSD get wastewater to the Lemay treatment plant.

The machine has been hard at work, crunching through 3,200 feet of limestone since February. MSD says the tunnels, like the one just completed, will help homeowners who have to deal with wet basements every time there is a heavy rain.

The machine digging the tunnel is named "Chelsea the Chomper after the owner's granddaughter. The machine comes from South America, but this is its second time digging tunnels in St. Louis, and it's not done yet.

MSD says it plans to dig 11 more tunnels before the $4.7 billion dollar project is complete.

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