South Hartford Conveyance and Storage Tunnel

South Hartford Conveyance and Storage Tunnel

The SHCST is a four mile long deep rock tunnel designed to store excess combined wastewater and storm water during rain events, and then convey the flows to the Hartford Water Pollution Control Facility (HWPCF) for treatment.
Wet Weather Expansion

Wet Weather Expansion

MDC is expanding the capacity of the Hartford Water Pollution Control Facility to provide treatment of wet weather flows, up to 200 million gallons a day.
About the Project

About the Project

When stormwater overwhelms the MDC’s sewer system, it causes combined sewer overflows into local waterways and backups into neighborhoods and basements.

News & Events

Hartford Courant:Tunnel Ahead (article and video)

August 2, 2018 - Learn More >

Wethersfield LIFE article on Goff Brook Microtunnel Project

July 10, 2018 - Learn More >

YouTube Video: MDC South Hartford Conveyance and Storage Tunnel Blasting

June 27, 2018 - Learn More >

MDC's Clean Water Project featured on New England Public Radio

June 26, 2018 - Learn More >

NBC CT story on MDC's South Hartford Conveyance and Storage Tunnel

May 23, 2018 - Learn More >

Design Develop Construct Journal article: Cleaning Up Connecticut

November 28, 2017 - Learn More >

WNPR story on the MDC's Tunnel Project

November 7, 2017 - Learn More >

Tunnel Business Magazine article on MDC Tunnel Projects

October 25, 2017 - Learn More >

YouTube Video: South Hartford Conveyance and Storage Tunnel Construction October 2017

October 18, 2017 - Learn More >

New England Real Estate Journal article: Tunneling to Success

August 21, 2017 - Learn More >

Featured Videos

Tunnel Boring Machine construction update August 2018

Time Lapse Construction Video of Tunnel

South Hartford Tunnel Pump Station Blasting

South Hartford Conveyance and Storage Tunnel Blasting

South Hartford Conveyance and Storage Tunnel Construction October 2017

South Hartford Conveyance and Storage Tunnel Construction

South Hartford Conveyance and Storage Tunnel Groundbreaking

MDC Wastewater Treatment

MDC Wastewater Documentary

Complexity Under Control - The Clean Water Project - CDM SMith Project Stories

The Clean Water Project

The Metropolitan District (MDC) manages the Hartford region's drinking water and wastewater systems.  The Clean Water Project is a program that upgrades the MDC's wastewater infrastructure with more than $2 billion of improvements designed to protect the health and safety of citizens during storm events and formally addresses a federal consent decree and a Connecticut DEEP consent order to achieve Federal Clean Water Act goals.