Sheetflow Erosion & Sediment Control Heavy Civil Construction

June 30, 2020

Sand Bag Berm Around Catch Basin

Photo: David Jenkins

The down side to using sandbags is that you can’t get a good seal and they leak. The idea behind this is that water ponds and some of the sediment settles out. With the leakage, little settling can occur. The catch basin insert will catch some of the sediment but since we are regulated on turbidity in Washington, neither BMP cuts turbidity low enough to meet the compliance standard. Our contract specifications require that discharges not exceed 25 Nephelometric Turbidity Units (NTUs).

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