How thick should the gravel be for a construction entrance?

For a construction entrance, the recommended thickness of the gravel layer is generally 6 inches. This thickness is effective for providing sufficient structural support and stability for vehicles entering and exiting the site, while also serving to trap sediment and prevent it from being tracked into public roadways.

A 6-inch layer ensures that the gravel can adequately absorb the impact of construction vehicles, which can be heavy and may cause displacement of the material if it is too thin. Additionally, this thickness allows for effective filtration of water through the gravel, which helps reduce erosion and sediment runoff during rain events.

Thicker layers, while potentially beneficial in some applications, can increase costs unnecessarily and may not provide additional functional benefits in the context of a construction entrance, which is primarily designed to control sediment and provide access to the construction site.