What is a Turbidity Barrier Use For?

I am just getting started in the construction business and with the Clean Water Act, I need to stay in compliance. I was told that a turbidity barrier is a BMP for this. What is it made of? How is it used?

Thanks for contacting Granite Environmental. I'm happy to tell you about the functions of a turbidity barrier. This BMP is also known as a silt curtain and is made from reinforced impermeable PVC fabric. It has 6" Marine Grade Floats to keep the curtain afloat in the water. It can also be made with a permeable geotextile fabric (for the skirt).

A turbidity curtain is used to provide sedimentation protection for a watercourse from upslope land disturbance where conventional erosion and sediment controls cannot be used, or from dredging or filling within the watercourse. The sediment is contained and ultimately settles, keeping the remaining water clean and free of sediment that may be contaminated from site runoff.

The water type in which the turbidity barrier is installed will determine which type of barrier you need. A type 1 is used in calm water, the type 2 is best in medium waters < 1.5 knots, and a type 3 is designed for rough or open waters.

Should you have any more questions or need assistance, feel free to give us a call. We're happy to help!

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