“normal” manholes are typically 4- to 5-feet deep and wide enough for the average person to fit in. “shallow” manholes are 2- to 3-feet deep, often placed at the start of a sewer branch and in areas with low traffic.
How Deep Is a Manhole?
A manhole is a hole in the ground that provides access to a subterranean utility structure, such as a storm drain, sewer or utility line.
The term “manhole“ is most often used in the United States, Canada and Australia, while the term “utility hole“ is used in other English–speaking countries.
A manhole cover is a removable plate used to close off the manhole opening. Manhole covers are often made of cast iron, but can also be made of plastic, fiberglass or composite materials.
The depth of a manhole varies depending on the utility it provides access to. For example, a manhole for a sewer line is typically deeper than a manhole for a water line.
The depth of a manhole also varies depending on the soil conditions in the area. In areas with a high water table, the manhole may be constructed above ground level to prevent the manhole from flooding.
The diameter of a manhole is typically large enough to allow a person to enter, but small enough to prevent a vehicle from falling in.
The average diameter of a manhole is 3 to 4 feet (0.91 to 1.22 meters). Manholes are typically round, but can also