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A stormwater detention system during installation beneath a parking lot. A stormwater detention vault is an underground structure designed to manage excess stormwater runoff on a developed site, often in an urban setting.
A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage gas. [4]
Another mode of system failure can include power outages, which may disable lift station pumps and cause sewage overflow from the lift station wet well. Lift station mechanical or power failure causes approximately ten percent of United States SSOs. This type of discharge is uncommon from combined sewers, because the combined volume of sewage ...
A force main or rising main [8] is a pumped sewer that may be necessary where gravity sewers serve areas at lower elevations than the sewage treatment plant, or distant areas at similar elevations. A lift station is a sewer sump that lifts accumulated sewage to a higher elevation.
The suction excavator uses suction fans for the airflow to suck up the material that is then transported into the holding tank. Hydro excavation, a type of suction excavator using high-pressure water jets, is sometimes referred to as daylighting, as the underground utilities are exposed to daylight during the process. [2]
KOS+ M openwell submersible pump. Small-scale sewage pumping is normally done by a submersible pump.. This became popular in the early 1960s, when a guide rail system was developed to lift the submersible pump out of the pump station for repair, and ended the dirty and sometimes dangerous task of sending people into the sewage or wet pit. [1]
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The capitalized cost of operation and maintenance of lift stations and emergency power supplies usually justifies considerable first cost for excavation or tunneling to build a gravity sewer. [3] Sewage treatment is most efficient at centralized locations; and pumping is often required to lift sewage from lower elevations to the sewage ...