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Parshall Flume Flow Monitoring Manholes from Openchannelflow take the tried and true Parshall flume and factory integrate it into a fiberglass manhole.  The resultant structure is perfect for monitoring industrial discharges, municipal sewers, and dam seepage on below grade…

For installations where a Packaged Metering Manhole will be located away from vehicle and pedestrian traffic, Openchannelflow offers domed fiberglass tops.  These tops are lightweight, structurally strong, and provide excellent operator access.  Openchannelflow offers…

One of the problems that operators face is trying to meter a line that is located in a street / parking lot / or other vehicle traffic area. While Packaged Metering Manholes provide all-in-one primary device integration with easy operator access in one structure structure, the…

Those responsible for collecting and reporting industrial pretreatment discharge information (typically flow, pH, BOD, and temperature) are rarely dedicated professionals. Almost always, environmental discharge monitoring is just one of a laundry list of job duties they have to…

For installations where a Packaged Metering Manhole will be subject to vehicle (AASHTO H-20/HS-20) traffic require custom formed reducers are necessary to transfer the lop load to the manhole walls. Laminated to the top of the manhole barrel, the reducer provides a bench on to…

For years Openchannelflow has offered staff gauges integrated into our flume, weir, and manhole products.  Over time, though, we have been asked to expand our offerings to include free-standing staff (level) gauges. Openchannelflow staff gauges are availalbe in a range of:…

With the advent of the Packaged Metering Manhole (PMM) in the 1960’s, monitoring wastewater discharge compliance by industrial customers became considerably easier.  By factory integrating a primary device (usually a flume or weir, but mag meters can also be…

From an industry standpoint, the primary reason for monitoring a facility is to ensure that the industry is fairly charged for the pollutant load that they discharge to the municipal wastewater treatment system or per a NPDES (National Pollutant Discharge Elimination System)…

Recently an industrial customer of Openchannelflow installed one of our fiberglass Packaged Metering Manholes and documented the steps involved in its installation. The Packaged Metering Manhole is located next to the customer’s loading docks, so a traffic loaded (H-20) top…