RJN Group Inc., a professional engineering and specialty field services firm, was selected by the Massachusetts Water Resources Authority (MWRA) to provide professional engineering services, including assessment of the existing wastewater metering network and data platform, field services, flow meter and data platform evaluations, design, and resident engineering/inspection services, associated with the upgrade of the MWRA’s Wastewater Metering System.

This complex system contains 212 metering sites within pipes with varying shapes, sizes, and depths ranging in size from 8 inches to 150 x 138 inches, with manhole depths ranging from 5 feet to more than 40 feet deep. The metering sites are located in residential, commercial, and industrial areas.

The MWRA’s permanent wastewater metering system was initially constructed in 1994. The primary purpose has been to quantify wastewater flow from each of the 43 MWRA wastewater member communities. Other uses of the data include collection and treatment system analysis and planning, infiltration and inflow quantification in member communities, use in hydraulic models and to a limited extent, operations support.