Type 3 Turbidity Curtain

A Type 3 Turbidity Curtain is a heavy-duty floating barrier engineered for deeper water and stronger currents than lighter silt curtains can handle. Reinforced PVC panels hang from rugged flotation and dual tension cables, while a ballast chain keeps the skirt vertical so it forms an underwater wall that traps sediment stirred up by dredging, pile driving, or bridge work. By keeping suspended particles inside the work zone, the Type 3 Turbidity Curtain protects water clarity, shields sensitive habitats downstream, and helps construction move forward without costly environmental delays.

Type 3 Turbidity Curtain Specifications

Geotextile

Woven filter fabric inserted into skirt of no less than 20% of skirt area

• Minimum average roll values:
• Grab Tensile (ASTM D-4632) - 370/250 lb (1.64/1.11 kN)
• Grab Elongation (ASTM D-4632) - 15%
• Mullen Burst (ASTM D-3786) - 480 psi (3300 kPa)
• Puncture (ASTM D-4833) - 135 lb (.60 kN)
• Trapezoidal Tear (ASTM D4533) - 100/60 lb (.444/.265 kN)
• AOS (ASTM D-4751) - 70 sieve (.212 mm)
• Permittivity (ASTM D-4491) - .28/sec
• Flow Rate (ASTM D-4491) - 18 gal/min/sq.ft. (730 L/min/sq. m)

All main body seams are heat sealed. All geotextile seams are sewn double needle, black thread 5/8” diameter poly rope reinforced vertical edges

• #5 brass grommets
• 5/16” galvanized steel 7x19 load cable with PVC coating in top, 10,000 lb. break strength
• 5/16" galvanized chain ballast
• Aluminum stress plates at cable and chain terminations
• EPS flotation foam: 8” x 8” (standard. Increases to 10” x 10” and 12” x 12”- Based on curtain depth), 26.7 lb./ft. buoyancy in fresh water and 28.4 lb./ft. buoyancy in saltwater