2002-06-26 CC Packet - Laserfiche WebLink

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., "I ,. Sedimen'LCtQntrol -Sill: t'ences Wire mesh reinforcement (heavy-duty) Silt fence fabric ~ Direction of runoff flow - Fabric anchorage .~- trench backfill with tamped natural soil ., ...... .... .... II I" ..".......:: :.:( S"minimum ;..... .:. . ':.. .... " :: 1ti"~I~I~~~ Metal or wood post or stake ...... ". .. ...... /Ou,,'" :',",': . ". .... Natura! soil '. . -..,:.:- " , " NOTE: Depending on configuration, attach fabric to wire mesh wrth hog rings, steel posts wrth tie wires or wood posts with staples Figure 1: Typical Installation for Silt Fence Source: MPCA, 2000 Reauir~ments I)~SI!l,qcomnu.eBJ - Basic Components . Geotextile should be uniform in texture and appearance and have no defects, flaws or tears that would affect its physical properties. It should contain sufficient ultraviolet (UY) ray inhibitor and stabilizers to provide a minimum two-year service life outdoors. (See Table I). . Wire mesh backing is required with heavy duty silt fence. Use three vertically placed wire fasteners ("hog rings") to fasten the geotextile woven wire fence material at a minimum spacing of2 feet (see Table I). . Steel posts are used for heavy duty silt fence (maximum 8 feet apart) and machine-sliced installation (maxi- mum 6 feet apart) Steel posts should be 1.25 Ib.llinear ft with a minimum length of 5 feet They should have projections to facilitate fastening the fabric. Standard metal T posts with a welded plate for both installations. Standard applications may use wooden posts, I.S-inch hardwood with a minimum length of 4 feet They should have a sharpened end and should be set in the ground at least 1.5 feet deep. Each post should be spaced 4 to 8 feet apart, depending on the lype. and securely fastened to the geotextile and net backing by ties or staples suitable for such purpose. (See Table I) 3-108 Minnesota Urban Small Sites BMP Manual