What type of soil is characterized as hardpan or clay?

Type A soil is characterized by its high clay content and cohesive nature, which can make it compact and hard to work with. When referring to soil as hardpan or clay, it typically means that the soil has a dense and impermeable layer due to the accumulation of clay particles, which can restrict water drainage and root penetration. This type of soil often presents challenges in excavation and construction activities due to its strength and stability.

Type A soil is generally recognized for its ability to support heavy structures, but this same characteristic can make it difficult for maintenance activities in collection systems. Understanding the properties of Type A soil is essential for effective planning in construction and maintenance, allowing workers to implement appropriate practices when dealing with soil that has high clay content.