Silt Fencing
Silt fencing is a temporary erosion and sediment control measure designed to stop soil from washing off exposed ground and into nearby drains or waterways. It uses a geotextile fabric supported by posts to create a barrier that slows down water and traps sediment while allowing cleaner water to pass through.
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How It Works
When rainwater runs across disturbed or bare soil, it often carries fine particles with it. A silt fence intercepts this flow, reducing speed and filtering the runoff so that sediment settles out before reaching streams, rivers, or stormwater systems.
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Applications
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Silt fencing is commonly used:
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Around construction and earthworks sites
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Downslope of bare soil or stockpiles
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Along drainage lines or near waterways
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At the perimeter of roading or subdivision works
Benefits
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Provides immediate erosion and sediment control on disturbed ground
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Simple, quick, and cost-effective to install
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Reduces the risk of sediment entering sensitive environments
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Supports compliance with erosion and sediment control (ESC) requirements
Things to Note
Silt fencing is a temporary solution and works best for sheet flows of water rather than concentrated flows. It requires routine checks to ensure the fence is upright and sediment build-up is cleared so it can continue working effectively.
