1999-338A - Laserfiche WebLink

Home Browse Search

i A 2. Tne filter fabric shall be purchased in a continous roll cut to the length of the barrier to avoid the use of joints. When joints are support necessary, filter clotn shall be spliced together only at a post, with a minimum 6 -inch overlap, and securely sealed. 3. posts shall be spaced a maximum of 16 feet apart at the barrier location and driven securely into the ground (rinimum of 12 inches). When extra strength fabric is used without the wire support Fence, post spacing shall not exceed 6 feet. 4. A trench shall be excavated approximately 4 inches wide and 4 inches deep alono the line of posts and upslope from the barrier. 5. When standard strength filter fabric is used, a wire mesh support fence fence shall be fastened securely to the upslope side of the posts using heavy duty wire staples at least 1 inch long, tie wires or hog rings. The wire shall extend into the trench a minimum of 2 inches and shall not extend more than 36 inches above the original ground surface. 6. The Standard Strength filter fabric shall be stapled or wired to the fence, and 8 inches of the fabric shall be extended into the trench. The fabric shall not extend more than 36 inches above the original ground surface. 7. When extra strength filter fabric and closer post spacing are used, the wire mesh support fence may be eliminated. In such a case, the filter fabric is stapled or wired directly to the posts with all other provisions of item No. 6 applying. 8. The trench shall be backfilled and the soil compacted over the filter fabric, 9. Silt fences shall be removed when they have served their useful purpose, but not before the upslope area has been permanently stabilized. Maintenance 1. Silt fences and filter barriers shall be inspected immediately after each rainfall and at least daily during prolonged rainfall. Any required repairs shall be made immediately. 2. Should the fabric on a Silt fence or filter barrier decompose or become ineffective prior to the end of the expected usable life and the barrier still be necessary, the fabric shall be replaced promptly.. 3. Sediment deposits should be removed after each storm event. They must be removed when deposits reach approximatley one-half the height of the barrier. 4. Any sediment deposits remaining in place after the silt fence or filter barrier is no longer required shall be dressed to conform with the existing grade, prepared and seeded.