Manhole
A manhole (alternatively utility hole, maintenance hole or access chamber) is the top opening to an underground utility vault used to house an access point for making connections or performing maintenance on underground and buried public utility and other services including sewers, telephone, electricity, storm drains and gas. It is protected by a manhole cover, a (usually metal) plug designed to prevent accidental or unauthorized access to the manhole. Manholes are usually outfitted with metal or polypropylene steps installed in the inner side of the wall to allow easy descent into the manhole.
Manholes are generally found in urban areas, in streets and occasionally under sidewalks. They are usually in circular shape to prevent accidental fall of the cover in the hole.
In rural and undeveloped areas, services such as telephone and electricity may be carried on pylons rather than underground.
topManhole
A manhole (alternatively utility hole, maintenance hole or access chamber) is the top opening to an underground utility vault used to house an access point for making connections ...
Manhole - Wikipedia, the free encyclopedia
A manhole cover is a removable plate forming the lid over the opening of a manhole, to prevent anyone from falling in and to keep unauthorized persons out.
Manhole cover - Wikipedia, the free encyclopedia
Manhole Adjustable Riser Co. provides municipal and utility lid risers for gas, water, sewer, electrical and telephone valves. We custom build each riser out of durable cast ...
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