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Safety Stories:
Safety Stories:

How Much Silt Fence Do You Need to Get the Job Done?

June 15, 2012

One of the questions often asked is how much silt fence do we need to adequately contain the worksite soil?

There are many factors to consider when deciding how much silt fence to install,but the reasonable rule-of -thumb for the proper amount of silt fence is—100 ft of silt fence per 10,000 square foot (sq ft) of disturbed area.

Soil type, slope, slope length, rainfall, and site configuration are all important elements in determining the adequate silt fence protection for a site, and to what extent it fits the 100 ft per 10,000 sq ft rule-of-thumb.

If the amount of fencing provides the volume of runoff storage needed, then over-flowing the silt fence runs will be minimized. This is the basic test; if fences are over-flowing after a moderate rainfall event, the amount of fencing probably needs to be increased to avoid undercutting, washouts, and fence failures.