Dredging Turbidity Curtains | Control Displaced Materials

Dredging Turbidity Curtains

Question regarding Dredging Turbidity Curtains: I need a turbidity curtain for dredging to help control displaced materials during my project. I am located in Florida and need something that is maybe 200' long and 10' deep. Which type turbidity curtain do I require for my project? How does this work to keep materials contained? How should I install this barrier?

lake turbidity curtain

Answer:

Due to the constantly displaced silt and turbidity that occurs during a dredging project, Turbidity Curtains are one of the most common options used to help contain and control turbidity. These barriers typically include a top flotation and bottom skirt that provides containment both on top and underneath the water surface.

While the primary goal of these barriers is to prevent turbidity from spreading, they also provide an extended depth that gives silt adequate time to settle. This reduces the amount of suspended solids and helps bring sediment back down to normal levels.

Questions? We can help! Call our team at +1-772-646-0597 or submit a form.

Choosing the Right Curtain for your Location

Any time you are looking to choose a turbidity curtain for your location, there a several factors you can take into consideration to help choose the right option for your site. The list below provides a general guideline for factors you should consider when choosing a barrier:

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  • Water Velocity: Current Speed (fps or knots)
  • Waves: Height, Frequency
  • Wind: Speed and Direction
  • Tides
  • Site Conditions: Contaminated Soil, Project Duration, etc.


When specifically dealing with dredging locations, we usually recommend that customers use a Type 2 or Type 3 curtain (moving water options). While dredging can occur in areas with no water current, the act of dredging often produces its own waves and moving water. Since the curtain's main goal is to contain materials in these waters, barriers should be equipped to handle a moving water condition produced by the dredging process.

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Dredging Turbidity Curtain Installation

Installation of a dredging turbidity curtain should be similar to installation of any standard barrier. The process will involve a series of steps that start with connecting sections of barriers, towing the curtain into position, and then anchoring/installing the barrier. Since most of the waters in these areas are moving, anchor kits (including anchors, buoys and painter rope) are often implemented to keep the barrier in place.

While the installation method for a turbidity curtain can vary from site to site, curtains are most commonly installed directly around the dredging location to contain displaced materials to the containment site. If you are unsure of how this process can work in your location, please do not hesitate to give us a call at +1-772-646-0597 to discuss your requirements.

Questions? We can help! Call our team at +1-772-646-0597 or submit a form.

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If you have any additional questions on dredging turbidity curtains, please contact our Granite Environmental sales team at +1-772-646-0597.