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Deep under St. Louis County, a 7-mile tunnel is being built to relieve overflowing sewers
View allFebruary 24, 2023
News
When completed in 2025, the 7-mile tunnel will take water to the Lower Meramec Treatment Plant near the confluence of the Meramec and Mississippi rivers. The $175 million tunnel is aimed at reducing overflow and improving water quality throughout the sewer district, said MSD Executive Director and CEO Brian Hoelscher.