1605TEMPORARY SILT FENCE

TEMPORARY SILT FENCE -1 DESCRIPTION Furnish material, construct, maintain and remove temporary silt fence in locations shown in the plans or in locations that require surface drainage to be filtered. -2 MATERIALS Refer to Division 10. Item Section Geotextile, Type 3 1056

Provide steel posts with at least 5 f eet long, 1 3/8 inch wide measured parallel to the fence and 1. 25 lbs. per foot in weight per length. Equip with an anchor plate with an area of at least 14. 0 square inches . Ensure a means of retaining fencing material in the desired position without displacement .

Provide woven wire fence at least 32 inches high with 5 horizontal wires , vertical wires spaced 12 inches apart , 10 gauge top and bottom wires and 12 1/2 gauge for all other wires.

Provide plastic ties, wire fasteners or other approved attachment device. -3 CONSTRUCTION METHODS Install in locations as shown in the plans or as directed by the Engineer . Install wire and geotextile as shown in Roadway Standard Drawings . Geotextile may be used without the woven wire fence backing with a post spacing of not more than 6 feet . Install post inclined toward runoff source, at an angle of not more than 20° from vertical. Attach geotextile to the post with acceptable methods. Overlap geotextile at least 18 inches at splice joints. -4 MAINTENANCE AND REMOVAL Maintain the silt fence until the project is accepted by the Engineer or until the fence is removed. Remove and replace deteriorated or ineffective geotextile . Remove and dispose of silt accumulations in accordance with Section 1630 when necessary or as directed by the Engineer . Leave silt fence in place until site stabilization an d remove at project completion. Removed silt fence becomes the property of the Contractor. Dress and seed and mulch all areas where silt fence is removed i n accordance with Section 1660.