When should temporary perimeter controls be removed?

Temporary perimeter controls should be removed after all upstream areas are finally stabilized. This approach ensures that sediment and other pollutants do not run off into water bodies when the site is vulnerable due to ongoing construction activities or stabilization processes.

Removing these controls prematurely, such as before the upstream areas are stable, could lead to increased erosion and sedimentation, which can have negative environmental impacts. It’s crucial to maintain perimeter controls until the risk of sediment leaving the site has been effectively mitigated, which aligns with best management practices in erosion and sediment control.

The timing of removal is closely linked to the overall stabilization of the site, ensuring that all disturbed areas are adequately managed and that adequate measures are in place to protect water quality during and after construction.