South Hartford Conveyance and Storage Tunnel

The South Hartford Conveyance and Storage Tunnel (SHCST) is a four-mile long deep rock tunnel constructed to convey and temporarily store wastewater from portions of Hartford and West Hartford during storm events. The tunnel will extend from the Hartford Water Pollution Control facility in the South Meadows of Hartford to Talcott Road in West Hartford.  When completed, the tunnel will minimize sewer overflows into the local waterways, the Connecticut River and Long Island Sound during major storm events.  The SHCST project is the largest infrastructure component of the MDC’s Clean Water Project and the largest contract ever awarded by the MDC.

Length: 4 miles
Diameter: 18 feet
Depth: 200 feet
Capacity: 41.5 million gallons
Material to be removed: 900,000 tons