TURBIDITY BARRIERS

Type I Economy

The economy floating turbidity barrier is ideal for still or calm waters such as ponds, lakes, streams and ditches.  The skirt is manufactured from impermeable lightweight reinforced PVC coated fabric with a standard depth of 5′.  Section lengths of 50′ or 100′ are connected either by laced grommets or chain. Its compact design allows for easy storage while its affordability helps to meet a tighter budget.

Type I DOT

Type I DOT floating turbidity barrier is best for inland waterways such as ponds, lakes, streams and ditches.  It specifically complies with the U.S. Department of Transportation (DOT) and other regulatory requirements for silt control in calm water conditions. Type I DOT floating turbidity barrier is available in both impermeable and permeable options.  Type I works well in protected waterways with light wind or calm currents.

Standard Specifications

• 6” dia. flotation enclosed in impermeable reinforced PVC fabric, heat-sealed to be watertight and to keep the floats from shifting.
• 5′ standard depth skirt is installed below the float (other depths available)
  • Impermeable skirt – 13 – 18 oz. reinforced PVC coated fabric
  • Permeable skirt -woven slit film or nonwoven  geotextile filter fabric
• Galvanized steel chain ballast chain enclosed in a PVC pocket along the bottom
• Standard section lengths of 50’ and 100’  are joined together with lacing grommets.

Type II

Type II floating turbidity barrier is designed specifically for locations with wind, waves, current and tidal changes. Inland coastal waterways, estuaries, rivers and tidal ponds are some areas this barrier is deployed to control silt, sediment and debris. Type II floating turbidity barrier is available in both impermeable and permeable skirt options depending on the water conditions.  It is ideal for most regulated applications. Uses include silt and sediment control during dredging activities, shoreline restoration/ remediation, pile driving and rip rap installation.

Type II DOT

Type II DOT floating turbidity barrier complies with the U.S. Department of Transportation (DOT) and other regulatory requirements for silt control in calm to moderate water flow conditions. Type II DOT floating turbidity barrier is available in both impermeable and permeable options.  Uses include silt and sediment control during shoreline restoration, remediation, pile driving and marine work along inland coastal waterways, estuaries, rivers and locations with tidal changes.

Standard Specification

• 6” dia. flotation enclosed in impermeable reinforced PVC fabric It is then heat-sealed to be watertight. Float size increases as the depth of the skirt increases.  
• Tool-free ASTM universal slide connectors or grommeted ends/tow plates.
• 5/16 Top tension cable installed along the flotation
• 5′ standard depth skirt is installed below the float (other depths available)
  • Impermeable skirt- 18 – 22 oz. reinforced PVC coated fabric
  • Permeable skirt – either woven slit film or monofilament geotextile filter fabric
• Galvanized steel chain ballast chain enclosed in a PVC pocket along the bottom
• Standard section lengths of 50’ and 100’ can be joined together with lacing grommets  

Type III

Type III floating turbidity barrier is our strongest barrier for containing silt and sediment in areas with high winds, currents and tides such as rivers, bays, and shorelines. They are robust curtains custom built to your project’s specific requirements.  We select flotation size according to the skirt depth and utilize skirt materials that best match the application. Ideal for dredge containment, shoreline restoration, and demanding marine project sites.  When project conditions call for a barrier that can handle adverse conditions and withstand the elements, Type III floating turbidity barrier will keep your project contained.

Type III DOT

Type III DOT floating turbidity barrier contains silt and sediment in rivers, harbors and tidal zones.  It can handle conditions where flowing water is found and subject to winds and wave activity. Type III DOT turbidity barrier meets AASHTO-M288 specifications. Type III DOT silt curtains are manufactured with a permeable skirt that filters out silt and sediment effectively while allowing the barrier to withstand high flow conditions. Keeping your site in compliance with DOT regulation is of major importance.  You can rely on our Type III DOT floating turbidity to perform.

Staked turbidity barriers are excellent for controlling water flow at work sites that are adjacent to waterways.  They are ideal for shallow water applications with little to no water or areas where stormwater activities raise water levels and elevate sediment in the water.  Manufactured with impermeable reinforced PVC, finished along the seams and pre-pocketed every 4-6′ depending upon job site conditions.  Barrier depths range from 2-4’. Optional ballast chain is available.

Baffle systems prevent the migration of silt and turbidity from predefined structures.  They are flow control devices which increase the retention time and decrease the amount of TSS (Total Suspended Solids) within the water.  This increases water quality while keeping you in compliance with regulation.  We offer both floating baffle systems and bedload baffle systems. Floating baffle systems drop out sediments in the upper water column. Bedload baffle systems are submerged sections that reduce flow and capture sediments in the lower water column.

We incorporate skirt materials such as permeable, woven polypropylene geotextile fabrics, or impermeable polypropylene and PVC fabrics.  The baffles are tension cabled and ballasted continuously along the bottom.  We select components for their corrosion resistance properties, UV resistance, chemical resistance and strength characteristics. This ensures that we construct the ideal baffle system for your application.

When standard turbidity barriers can’t meet the needs of your unique deep water project site, IWT Cargo-Guard has a solution. We design custom deep water turbidity barriers that withstand rigorous site conditions to successfully capture fine sediments and contamination. Our deep water turbidity curtains can handle the substantial forces of weight, current, wind and wave activity. Our experience and expert manufacturing techniques ensure that your barrier will perform to your highest expectations.

Moon Pool Curtains are hung from marine platforms configured into a containment cell that completely encloses a dredge site, capturing all of the contaminants / sediments within. The moon pool curtains are affixed to a platform and can be adjusted to adhere to the bottom during the dredge operation. Contractors may have their own unique approach to the exact curtain design for this application.  IWT Cargo-Guard has been instrumental in the custom design of these sophisticated moon pool curtains and will work with you to design a curtain that meets your needs.

A dredge barge silt curtain system mounts directly onto the side of a barge.  It contains displaced sediment while limiting impact to nearby areas.  This is especially important for hydraulic or mechanical clamshell dredges working in environmentally sensitive areas or busy shipping lanes.  The system is also ideal for dredging projects that need the curtain to move with the barge.  We can help you design a system to suit your needs.

Regulatory bodies continue to introduce new marine mandates that contractors are to follow. As a result, fish exclusion barriers have become necessary when working in and around bodies of water. During certain times of the year, fish migrate in and out of specific areas to spawn or forage for food. When work cannot stop during these crucial migrations, a fish exclusion barrier is the solution. It prevents fish from swimming into the work zone, potentially harming them or their spawn. Fish exclusion curtains make constant contact with the bottom and are made of fine mesh/netting. This allows water to flow through freely while keeping large and small fish out.

Jellyfish exclusion barriers are ideal for bodies of water where stinging jellyfish are a problem for swimmers. They keep jellyfish out while allowing important sea life to flow in an out of swimming or water activity areas. These barriers effectively keep an area clear of stinging jellyfish while allowing tourists, swimmers and beachgoers to roam without fear.

• 6” diameter float size, 12 lbs./ft. buoyancy
• 8” diameter float size, 21 lbs./ft. buoyancy
• 12” diameter float size, 50-60 lbs./ft. buoyancy (required for skirts depths of 11′ or greater)

• Impermeable coated for high abrasion resistance
• Specialty monofilament filter fabrics for higher flow and fast current environments
• Impermeable woven coated reinforced PVC from 13 oz./sy – 28 oz./sy
• Nonwovens for finer sediments and hydrocarbons
• Impermeable XR-5 for high chemical resistance
• Impermeable XR-PW for potable water/reservoirs
• Slit film woven geotextiles
• Geogrids

• Grommeted end/tow plate and lacing grommets
• Tool-free aluminum universal slide connectors and lacing grommets
• ASTM marine grade aluminum Quick “Z” connectors and lacing grommets
• Stainless steel

We can install skirt reefing / adjusting lines on any of our turbidity barriers. They allow the barrier to adjust to the contours of the floor and changing water depths.

• 1/4” galvanized steel chain
• 3/8” galvanized steel chain
• 5/16” galvanized steel chain
• Dual ballast chain
• Other ballast weights and stainless steel options are also available

• Single 5/16” PVC coated galvanized aircraft cable
• Dual 5/16” PVC coated galvanized aircraft cable
• Stainless steel