Model Type 3 -Silt Turbidity Curtain

Without a doubt one of the most used silt screen and silt curtains product for NPDES and Clean Water Act compliance on marine based activities where protecting the environment is key.

The sturdy components of the Type 3 Silt Barrier are selected for there superior performance in demanding applications. This turbidity curtain is easy to use and can be equipped with skirt furling lines for multiple deployments or relocating.

The Type III Silt Curtain has been used on numerous projects globally and is the workhorse of the silt barrier family.

Each floating silt curtain can be built to your project needs, whether you require a 3’ deep or 100’ deep skirt, high tensile fabric or woven monofilament filter fabric geotextile.

Turbidity Curtain Picture Overview

Granite Environmental, Inc. is dedicated to providing superior performance products that get the job done well. We work closely with our client project teams to determine the best deployment configuration and approach for a site specific application.

In order to provide an accurate assessment for our clients we normally will request the following information:

• site conditions
• water velocity
• waves (height, frequency, etc)
• wind speed and direction
• tides
• soil type (contaminated?)
• project duration
• site specific requirements and project specifications

In addition, if the project is environmental remediation, like pcb (heavy metals) removal, capping or brownfields (coal tar)site development we may suggest a site survey/walk to get an in-depth understanding of the entire requirements.

Typical Type III Silt Barrier Specifications:

• Fabric is heavy duty 22 oz Vinyl Coated PVC
• Barrier is High Visibility Safety Yellow
• Flotation size is normally 8” or 12” Marine quality and is dependent on skirt depth
• Load carrying components are the base fabric (500x550 lbs tensile ASTM) and Dual Center tension 5/16 inch galvanized Steel Cables (18,400 lbs tensile) , single 3/8 inch galvanized Steel Chain (10,400lbs tensile)
• The curtain skirt is ballasted to hang vertical in the water by a minimum 3/8” Chain weighing 1.5 lbs per foot.
• Sections easily connect at the waterline via extruded Aluminum ASTM Bulk Connectors with stainless steel toggle pin. Skirt connect via overlapped reinforced grommets and chains via shackles.
• Section ends are dual seamed, with bolt-rope reinforcement of a minimum of 1/4" inch rope.