Civil · C-YEHEK

Silt Fence Installation Details

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Standard construction and embedment requirements for a silt fence using either the slicing or trenching method. Steel T or U posts or four-inch hardwood posts are driven a minimum of twenty-four inches into the ground with an eight-foot maximum spacing. Woven wire fence of fourteen and a half gauge with six-inch maximum mesh openings acts as backing, secured to fence posts with wire ties or staples. Filter cloth material such as Filter X or Mirafi 100X is fastened securely to the fence with ties spaced at twenty-four inches at the top and mid-section, maintaining a two-foot minimum height above grade. In the trenching method, the fabric is placed in a six-inch by six-inch trench with an L-shaped dogleg and buried before compacting the soil, while the slicing method requires an eight-inch minimum depth below grade.

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