Silt Fencing

Silt Fence - HytexSilt management on UK construction sites is frequently limited to providing a wheel-wash at the site exit, but controlling silt movement on site can keep haul roads and access areas cleaner, minimising the need for such facilities. A useful tool in a silt management strategy for sites is the installation of silt fences in vulnerable areas to prevent silt running off sloping land onto areas you want to keep clean.

Silt fences are generally constructed of woven geotextiles, which are “heeled” into the ground to seal the bottom, and supported on timber stakes to hold them upright. Under heavy rainfall, silt-laden water is retained and filtered by the fence, keeping the silt in place whilst allowing substantially cleaner water to drain away. Once the rainy period has ended, the retained silt can be returned to the land from which it originated, and the silt fence is once again ready for the next period of wet weather.

Silt Fence DWInstallation can be by hand for shorter lengths, but on larger sites, mechanical installation is more practical, with attachments available for commonly used machinery.

Whilst silt fences are frequently employed to control silt run-off from open land in other sectors (such as forestry) as well as in construction, they are also useful for controlling dust-laden run-off from demolition operations, and around stockpiles of crushed materials.

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3 Responses to Silt Fencing

  1. liaqat hayat says:

    Why not the retained silt behind geotextile is engineered in a manner that it becomes a permanent feature.Has it been tried this way?To me it appear feasible in hilly ranges .Very interesting topic

    • Barry Smith says:

      No reason why the same technique can’t be used to form features, but so far its generally used as a silt pollution control technique. Interesting thought though …

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