What is a silt fence used for at construction sites?

A silt fence is primarily used as a temporary perimeter control for soil disturbance at construction sites. Its main function is to prevent sediment and other pollutants from leaving the construction area and entering nearby water bodies. When soil is disturbed during construction activities, it is particularly vulnerable to erosion, especially during rain events. The silt fence captures and retains sediment-laden runoff, allowing water to pass through while trapping particles, which minimizes the impact on surrounding environments.

By functioning as a barrier, the silt fence helps protect water quality and comply with environmental regulations. This mitigation practice is a crucial aspect of sediment control plans required at many construction sites to manage stormwater runoff effectively. The other options, while they may relate to various aspects of a construction site, do not align with the primary purpose of a silt fence, which is to manage soil erosion and sediment transport effectively.