What soil condition is most likely to be problematic for construction projects?

Organic silt is often problematic for construction projects due to its inherent properties. This type of soil typically contains a significant amount of decomposing plant material, which can lead to varying degrees of compressibility and instability. When saturated, organic silt can undergo significant volume changes, making it less reliable as a foundation material. The material's ability to retain moisture can also result in poor drainage, increasing the risk of erosion and weakening the integrity of structures built on it.

In contrast, undisturbed clay can provide stability when properly managed, sandy loam is generally well-draining and workable, and gravel offers excellent drainage properties and compaction which are desirable for construction. Organic silt, with its unique challenges, requires careful consideration and possibly additional engineering solutions to ensure adequate soil support for construction projects.