Narragansett Bay Commission

The Narragansett Bay Commission (NBC) is the largest wastewater authority in Rhode Island and is responsible for the operation of approximately eighty-nine (89) miles of combined sewer interceptors, many of which are over one-hundred (100) years old. For over a decade, EST was contracted by the commission to install, calibrate, replace, and maintain continuous flow monitoring and rain gauge equipment throughout the NBC service area. EST’s contract has included monthly monitoring of up to sixty (60) sites using permanent and temporary open channel flowmeters. The permanent meters are equipped with internal modems connected to dedicated phone lines. EST performed maintenance, calibration, and troubleshooting of the flow meters and communications systems and initiates communications with permanent flowmeters monthly to upload the monitoring data at selected CSO sites. Services also included the installation of rain gauges and meter testing, repair, and replacement. EST provided traffic control necessary to maintain the flow of vehicular and pedestrian traffic with as little disruption as possible.

Massachusetts Water and Resources Authority, Chelsea, MA – Sewer Flow Monitoring and Data Collection

The Massachusetts Water Resources Authority (MWRA) is the largest wastewater authority in New England and treats sewerage from forty-three (43) cities and towns in the Greater Boston area. EST was awarded contracts by the MWRA to install, program, calibrate, and maintain temporary open channel flowmeters at locations throughout the authority’s collection system.

North Hudson Sewerage Authority, Hoboken, NJ – Flow Monitoring Services

The North Hudson Sewerage Authority (NHSA) serves the cities of Hoboken, Union City, Weehawken, and West New York, New Jersey. Infiltration and illicit flows have been persistent problems throughout the system which includes approximately one-hundred (100) miles of sewer line. EST was contracted by the City’s consultant to perform flow monitoring services in order to monitor sewer flows in Hoboken, Jersey City, and West New York.

City of Chicopee, MA – Combined Sewer Overflow (CSO) Monitoring Program

Chicopee is the second largest city in Western Massachusetts. For decades, the City of Chicopee’s combined sewers have discharged untreated sewage and storm water into the Chicopee and Connecticut rivers. EST was contracted by the City’s engineering consultant to perform flow monitoring services in order measure and record combined sewer overflows within the City’s collection system.