What is a common structural sediment control measure?

The correct answer, silt fences, are a widely used structural sediment control measure designed to intercept sediment-laden runoff from construction sites or disturbed areas. Silt fences are typically made of geotextile fabric, which allows water to pass through while trapping sediment on the surface. This is particularly effective in environments where erosion is a concern, as it helps to prevent soil loss and protects water quality in nearby streams, rivers, or lakes.

Silt fences are usually installed along the perimeter of a construction site or in areas where sediment is likely to flow during rainfall events. The effectiveness of silt fences lies in their ability to create a barrier that slows down water flow, allowing sediment to settle before it can escape the site. This technique is crucial in reducing the impact of sediment on the surrounding environment, thereby aiding in compliance with regulatory requirements regarding erosion and sediment control.

While vegetative buffer strips, mulching, and temporary seeding are all important practices for stabilizing soil and reducing erosion, they fall into the categories of vegetative or stabilization measures rather than structural controls. Each of these practices has its role in erosion prevention, but silt fences specifically serve the purpose of controlling sediment transport during active site disturbance.