Perimeter Runoff Control

10/19/25

“Why do we need to protect the perimeter of our construction site from releasing sediment with stormwater runoff?”

Construction operators are obligated to apply best management practices to prevent stormwater runoff sweeping sediment from their sites from entering water bodies. One of the most important aspects is ensuring the perimeter of the site is controlled. Perimeter Runoff Control strategies keep sediment inside the site. Silt fences and sediment basins are examples of perimeter runoff control. The National Pollutant Discharge Elimination System Construction Stormwater Permit requires construction operators to implement perimeter runoff control before beginning soil disturbing activity as part of their stormwater pollution prevention plans. Construction operators can temporarily dismantle perimeter control infrastructure to allow vehicles to enter the site, as long as the infrastructure is restored as soon as possible. 

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• Earth/Climate science
• Engineering
• Urban Systems