Introduction
Manholes are an essential part of our infrastructure that provide access to underground utilities such as sewers, storm drains, and electrical maintenance. Let’s explore the definition, purpose, types, and importance of manholes in detail.
What is a Manhole?
A manhole is a vertical opening in the ground that allows workers to access underground utility lines for maintenance, inspection, and repairs. It is typically covered with a heavy metal lid that can be removed for access.
Purpose of Manholes
Manholes serve several important purposes, including providing access to underground utilities for maintenance and repairs, allowing for visual inspection of the condition of pipes, and facilitating the removal of debris and blockages.
Types of Manholes
There are several types of manholes, including sewer manholes, storm drain manholes, and electrical manholes. Sewer manholes are used for accessing sewer lines, storm drain manholes provide access to stormwater drainage systems, and electrical manholes house electrical cables and equipment.
Importance of Manholes
Manholes play a crucial role in maintaining the functionality and safety of our underground infrastructure. Without manholes, it would be difficult to access and maintain underground utilities, leading to potential disruptions in services and safety hazards.
Case Studies
In 2017, a major city experienced a sewer mainline blockage that resulted in widespread flooding and property damage. The blockage was quickly identified and resolved thanks to the use of manholes for access and inspection.
Statistics
According to a recent survey, there are over 20 million manholes in the United States alone, with millions more around the world. These manholes play a critical role in ensuring the proper functioning of our infrastructure.
