Sediment Control

 

Sediment control barriers are BMPs (best management practices) that separate sediment from sheet flow runoff. They reduce runoff velocities to prevent the transport of sediment.  They also pond sediment-laden runoff long enough for the soil particles to settle.  Since sediment control barriers are intended for areas experiencing sheet flow, they must be installed in areas that can pond water and accumulate sediment.  They must also be accessible for clean out.  Sediment barriers are the most common type of practices used on construction sites.  Phase II of the National Pollutant Discharge Elimination System (NPDES) requires that construction sites of one acre or more comply with regulations by implementing BMPs to control erosion and limit the amount of sediment produced during construction activities.

IWT offers a wide selection of BMP products such as erosion control blankets, turbidity barriers and silt fences to comply with these regulations.  In selecting a BMP product, consider site conditions and type of control needed.  Selecting the right sediment control products is essential to the success of a project.  For example, silt fence is not intended to act as an erosion control device and should not be installed across a slope.  Instead, it should be installed in relatively low areas suitable for ponding water and depositing sediment.

Please contact our office at 609-971-8810 so we can help you select the right products for your project.


Silt Fence

A correctly installed silt fence is effective and economical for sediment control.  Silt fence is manufactured from geotextile filter fabric that allows water to pass through while trapping soil particles long enough for them to settle.  IWT offers a variety of silt fences to suit state and local contract specifications.  Please give us a call at 609-971-8810.  We welcome the opportunity to provide quick turnaround at competitive pricing.

  • Contractors Grade Silt Fence
  • Plastic Mesh Backed Silt Fence
  • Drawstring Silt Fence
  • D.O.T. Silt Fence
  • Super Silt Fence Kits (6 ga., 9 ga., or 11.5 ga. chain link, silt fence fabric,posts, hog rings, and ties) Wire back silt fence (orange and black)

Coir Logs

Coir logs control erosion (such as along streambanks) to dissipate wave energy and flow velocity. The coir fibers absorb water while retaining sediments that break down.  This creates an excellent growing medium for vegetation establishment.  They last from 2-5 years depending upon density and environmental conditions.  This also gives plants a chance to establish strong root systems.  Coir logs also trap sediments and filter water on slopes and in channels.

Coir logs are available in 12″, 16” and 20” diameters and are 10’ or 20’ long. Density ranges from 5 lbs./cu.ft., 7 lbs./cu.ft. or 9 lbs./cu.ft.  Since the success of a project depends upon selection of the appropriate material, consider flow velocity, wave height, stream energy, and soil type.

Sediment Logs and Wattles

Sediment logs and wattles are manufactured from natural straw or wood excelsior fibers contained in a polypropylene or  all-natural jute netting material.  Their porosity allows water to pass through, rather than under, to filter out sediments.  As the water passes through, the velocity reduces naturally while sediment collects on the upstream side.  Sediment logs are also extremely flexible and contour to the terrain to maintain contact with the subgrade.  In addition, they offer six other benefits: lightweight, no trenching, no weed seeds, no disposal hassles, are reusable, and hold their shape.  They can be placed on bare soils, steep slopes, or around the job site perimeter to contain sediments.

Sediment logs and wattles are available in 6”, 9”, 12” and 20” diameters, with lengths of 10’ or 20’.

Silt Sacks

Silt sacks reduce the amount of silt and debris entering a stormwater inlet during construction.  Placing the 4´ x 2´ x 3´ sacks inside the storm drain collects debris as it enters the opening.  Custom sizes are also available.

Inlet Covers

These 2´ x 4´ inlet covers reduce the amount of silt and debris entering a stormwater inlet during construction.  Two layers of non-woven geotextiles allow water to pass through while trapping sediments.  Accumulated sediment deposits can then be hosed or brushed off.

Turbidity Barriers

Used to confine sediments in work zone when working near shorelines or in open waters. Check out our turbidity barrier/silt curtain page for  more information.

«       »
 

Disclaimer: These guidelines are for informational purposes only and are intended as illustration or general information only and are not intended as a guarantee or warranty. IWT assumes no responsibilities in connection with the use of this information.