Which of the following is included as one of the five common classes of BMPs for erosion and sediment control?

• A. Stabilization
• B. Perimeter controls and inlet protection
• C. Sediment basins and traps
• D. Good housekeeping and waste management

Answer: (C)

Sediment basins and traps are a dedicated BMP category focused on removing sediment from runoff generated on a disturbed site. They work by providing storage or a calm area where stormwater slows and suspended particles can settle out before the water leaves the site. This targeted approach addresses the problem after erosion has occurred and is especially useful on larger or highly disturbed areas where runoff carries a significant sediment load. Proper design, sizing, and, importantly, regular maintenance are essential so the basin or trap can capture the expected sediment and not become a source of pollution itself.

Other BMP classes address erosion prevention at the source (stabilization), keep sediment from leaving the site boundaries (perimeter controls and inlet protection), or manage waste and housekeeping practices to reduce potential pollutants, but sediment basins and traps specifically provide the on-site sediment removal capability, which is why they’re considered one of the common BMP classes.