What is the primary purpose of a silt fence in construction sites?

The primary purpose of a silt fence in construction sites is to keep sediment from leaving the site. Silt fences serve as a temporary sediment control measure designed to intercept and slow down the flow of water before it can carry sediments off-site. When it rains or when there is runoff, the water flows against the silt fence, causing sediment-laden water to settle behind the fence rather than flowing freely into nearby waterways or surrounding areas. This helps prevent pollution and degradation of the environment due to sedimentation.

While enhancing aesthetic appeal, providing a boundary for workers, and promoting plant growth can be important in their own right, these functions do not reflect the primary objective of a silt fence. The main goal is specifically related to sediment control, making it an essential tool for maintaining compliance with environmental regulations and protecting water quality during construction activities.