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Type 1 Turbidity Curtains

Type 1 turbidity curtains or silt curtains, as they are sometimes called, are floating barriers designed to control sediment and runoff at construction sites in calm waters. They are designed for easy deployment and meet Federal and State clean water requirements. American Marine, a division of Elastec, has been manufacturing quality turbidity curtains since 1967. Read our Frequently Asked Questions.

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Turbidity Curtain Questionnaire

In order that we may recommend the best Turbidity Curtain for your project, please provide the following information. If the flow rate is high, Elastec can provide modeling data to determine anchor spacing and feasibility of systems.

Turbidity Curtain Frequently Asked Questions

Are turbidity curtains in stock and ready to ship?
Account for lead times of a few weeks to produce a curtain in the factory. Most curtains will be custom and not off the shelf.

How much curtain do I need for my project?
Account for the anchor rodes. Best anchorage for turbidity curtains is a 5:1 slope. In 10′ of water you will have 50′ of anchor lines on one or both side of the curtain. Possibly into the work area.

How important are water conditions?
Water conditions (wind, wave height, flow rate) are important to ensuring proper anchorage is being used. Account for pull from intake structures, ice, debris, and wake from vessels.

How are deeper curtains affected by tidal flow?
The deeper the curtain, the calmer the conditions need to be. A curtain 30′ deep in 2 knot tidal flow will only have an effective depth of 13′ and will be difficult to keep in place even with heavy anchoring.

How deep should my curtain be?
Curtains should not touch the bottom. Flow of water is not going to be stopped by a fabric curtain. You cannot sand bag or add additional weight to the bottom of the curtain to keep it down. This will tear the curtain. Also, in calm situations, sediment can build up on the curtain making it impossible to retreive when the work is finished. Curtains will perform better the more parallel they are to the flow.

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