Which pipeline structures are typically above ground?

Natural gas transmission pipelines are typically found above ground due to several operational and safety considerations. These pipelines transport natural gas over long distances and require careful monitoring and maintenance. Above-ground installation allows for easier access for inspections and repair work, which is essential for safety in managing flammable gases.

Additionally, an above-ground structure can help to avoid complications that would arise from underground installations, such as issues related to soil erosion or damage from excavation activities. Visibility is another advantage, as it helps ensure that any leaks or other hazards can be quickly identified and addressed to prevent accidents.

Water distribution, pneumatic transmission, and sewage pipelines are generally located underground. Water distribution pipelines aim to avoid freezing and reduce environmental impact, while pneumatic pipelines, which often handle compressed air, are usually buried to protect them from physical damage. Sewage pipelines are also installed underground to minimize odor and avoid interference with surface activities.