Construction begins on phase 2 of longest tunnel in Missouri

Construction recently began on the $174 million second phase of the Lower Meramec Tunnel, which will become the longest tunnel in Missouri when it enters into operation in early 2025. The 6.8 mi long sanitary sewer tunnel is a key feature of a long-standing plan to streamline wastewater collection and treatment systems in the St. Louis region, and it will contribute to ongoing efforts to improve water quality in local streams and rivers, particularly the Meramec River.

A long-range plan

The need for the tunnel was first identified in 1978, with the completion of a long-range plan for meeting

Balaji Hume pipes

Hume pipes

RCC Hume Pipes

Reinforced Concrete Cement Pipes

RCC Manhole Covers

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