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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 installed), into a…

The Federal Water Pollution Control Act of 1948 was the first major U.S. law to address water pollution. Growing public awareness and concern for controlling water pollution led to sweeping amendments in 1972. As amended in 1972, the law became commonly known as the Clean Water…

Packaged flow measuring manholes are a drop-in place solution to the need to measure, sample, and characterize the flow of water through a collection system. Flow measurement is commonly done where industries discharge to a POTW's collection system or at critical sections in a…

Recently an industrial customer of Openchannelflow installed one of our fiberglass Packaged Metering Manholes and documented the steps involved in its installation.

One of the most common uses for flumes is to measure the flow of sewage though collection systems. While we may tout the advantages of Packaged Metering Manholes - and they are considerable - the higher initial cost means that when an existing manhole is available, a flume is…

For industries required to measure and / or sample their effluents prior to discharging to a municipal sewer system or surface water, finding sufficient area to install a primary device can be a struggle. In many instances, it is difficult to find a site that provides sufficient…

Most fiberglass manholes are installed in locations where neither foot or vehicular traffic is present. For those applications a fiberglass domes top is provided to aid in operator access. But what do you do when the manhole has to be placed where foot traffic will be present?

Industries measure their discharges either to meet their NPDES permit or because of municipal / county requirement. For industrial operators charged with monitoring their process discharges, a Packaged Metering Manhole can be a cost effective solution to their flow measurement…

At flow monitoring stations where a Packaged Metering Manhole is used to measure / sample a flow stream, the flow monitoring and sampling equipment is usually housed either in a dedicated equipment shelter or in a nearby building. There are times, however, when neither option is…

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…

To help the growing list of operators of our fiberglass Packaged Metering Manholes maintain their investments, Openchannelflow has put together an inspection form to standardize the collection and reporting of data useful in establishing maintenance cycles for Packaged Metering…

Packaged Metering Manholes factory integrate a flow measurement flume / weir into a fiberglass manhole to provide a complete, turn-key solution to monitor industrial and municipal flows. Openchannelflow Packaged Metering Manholes come complete and ready for immediate…