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Best Management Practices
What are the most common sediment and erosion controls? 

There are a variety of devices for controlling sediment and erosion on active construction sites. Below are examples of common devices, or BMPs (Best Management Practices).

 Silt Fence/Super Silt Fence
  • Used to control the perimeter of disturbed areas.
  • Consists of geotextile fabric stretched across posts. Wire or chain link fence may support the fabric.
  • Lower edge of the fence is vertically trenched to create a barrier.
  • Used in small drainage areas to detain and prevent sediment from entering receiving waters.
  • Super Silt Fence is backed by steel fence posts and chain link and is used where a more robust fence is needed. 
GOOD
Super silt fence in good condition
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Super silt fence in poor condition

Compost Filter Logs
  • Composed of tubular mesh casing filled with composted hardwood mulch.
  • Mulch acts as a filter media by retaining sediment and filtering runoff.
  • Alternative to silt fence and can be used in hard to reach areas such as frozen ground or pavement.
  • Does not require trenching and can be used near tree roots.
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Compost filter logs
 POOR
Filter log in poor condition

Stabilized Construction Entrance (SCE)
  • Installed where vehicles, equipment and machinery enter and exit an active construction site.
  • Consists of 2-3” diameter stone with filter fabric placed beneath.
  • Designed to reduce the amount of sediment transported onto public roadways by vehicle traffic.
  • Reduces sediment tracking by removing dirt and sediment from tires or treads.
  • Routine maintenance and replacement is critical for proper function.
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Stabilized construction entrance in good condition
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Stabilized construction entrance in poor condition

Inlet Protection

  • Placed around an inlet or drain to trap and prevent sediment from entering inlet structures.
  • Prevents the silting-in of inlets, storm drainage systems, or receiving channels. 
  • Composed of filter fabric, gravel and stone with a wire mesh filter, block and gravel or a combination.
  • Secured filter logs may also be used.
  • Routine maintenance and replacement is crucial for proper function.

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Inlet protection in good condition
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Inlet protection in poor condition

Temporary Stabilization
  • Used to provide cover and stabilization to disturbed soils when they become inactive. 
  • Mandatory after 7 calendar days of inactivity temporary stabilization is mandatory. 
  • Consists of seed and straw (hay) mulch is the most common type of temporary stabilization.
  • Other types include mats or “rolled erosion control products” and sprayed on wood fiber and seed mixtures (hydroseeding).
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Temporary Stabilization

Concrete Washout Structure 
  • Used to contains concrete washout and wastewater.
  • Provides location for ready mix concrete trucks to washout their hoppers, chutes and drums without depositing wastewater offsite or in an area onsite where it will runoff during a rain event. 
  • Composed of hay bails and plastic lining.
  • Routine maintenance, replacement and/or inspection for holes or tears is critical for proper function.
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Concrete washout structure

Permanent Stabilization
  • All disturbed areas require permanent stabilization immediately after construction is complete in those areas. 
  • Composed of Permanent Seeding and Planting, Mulching, Geotextiles, and/or Sod Stabilization
  • Reduces the amount of sediment potentially leave your site. 
  • If vegetation fails to grow and thrive, soil test and amendment is recommended and even required on some plans. For more resources, visit the UMD Extension.
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Properly stabilized soil after construction

Find more examples and specifications in the 2011 Maryland Standards and Specifications for Soil Erosion and Sediment Control.