What is the primary purpose of a sediment basin?

The primary purpose of a sediment basin is to collect sediment-laden runoff from areas larger than 3 acres. Sediment basins are designed to temporarily store stormwater runoff, allowing sediment and other particulates to settle out of the water before it is discharged into other water bodies. This practice is crucial for preventing pollution and protecting water quality in adjacent streams, rivers, and lakes, particularly in construction and land-disturbing activities where soil erosion can significantly increase sediment transport.

Sediment basins are strategically located to capture runoff from larger disturbed areas, helping to reduce the amount of sediment entering the stormwater systems and ultimately impacting receiving waters. Effective sediment management through these basins aids in compliance with environmental regulations and helps to mitigate the effects of development on local ecosystems.

The other options focus on unrelated functions. Reducing noise pollution, controlling site traffic, and storing extra construction materials do not align with the primary water quality objectives associated with sediment control measures such as sediment basins.