The use of silt fences shall comply with the following:

1. (a) Fences shall be used in areas where erosion will occur only in the form of sheet erosion and there is no concentration of water in a channel or other drainage way above the fence;
2. (b) The maximum contributing drainage area above the fence shall be less than ¼-acre per 100 linear feet of fence;
3. (c) The maximum length of the slope above the fence shall be 100 feet;
4. (d) The maximum slope of the area above the fence shall be 2:1;

5. (e) Fences shall be installed as follows:

   1. (1) Fences shall follow the contour of the land as closely as possible;
   2. (2) The ends of the fence shall be flared up-slope;

   3. (3) The base of the fence shall be:

      1. a. Folded such that not less than 4 inches of the fence is placed along the bottom of a trench that is excavated at least 4 inches deep into the ground, with the soil compacted over the embedded fabric; or
      2. b. If site conditions include frozen ground, ledge, or the presence of heavy roots, embedded in a minimum thickness of 8 inches of ¾-inch stone;
   4. (4) Support posts shall be sized and anchored according to the manufacturer’s instructions; and
   5. (5) Adjoining sections of the fence shall be overlapped by 6 inches, folded and stapled to a support post;
6. (f) Fences shall be inspected and maintained immediately after each rainfall and at least daily during prolonged rainfall; and
7. (g) Sediment that accumulates at the fence shall be removed with sufficient frequency to prevent the depth of the sediment from reaching one-third the height of the fence.

Source. #9343, eff 1-1-09; ss by #12342, eff 8-15-17; ss by #14472, eff 1-19-26, EXPIRES: 1-19-36