MDC Tunnel Project Hits Major Milestone

The Metropolitan District (MDC) announced that the South Hartford Conveyance and Storage Tunnel (SHCST) reached a major milestone on Tuesday, January 4 when the tunnel boring machine (TBM) “Iris” reached its destination at the MDC’s retrieval facility located on Talcott Road in West Hartford. The SHCST is a four-mile long deep rock tunnel designed to temporarily store excess combined wastewater and storm water during rain events, and then convey the flows to the HWPCF for treatment. The tunnel’s capacity of 41.5 million gallons will help prevent the HWPCF from being overwhelmed during storms. The 18-foot diameter tunnel is built in bedrock approximately 200 feet below ground. The tunnel is a major component of the MDC’s Clean Water Project, an over $2 billion wastewater system improvement program required by the US EPA and State of CT DEEP.

Press Release & Video: MDC Tunnel Project Hits Major Milestone

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