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BMP: SEDIMENT BARRIERS <br />1. METHODS: Sediment barriers are temporary structures that slow runoff and <br />trap small amounts of sediment. Sediment barriers can be built with: <br />? Straw bales; <br />? Filter fabric attached to a wire fence or to straw <br />bales; or <br />? Sandbags. <br />Sediment barriers should be used: <br />? Below small disturbed areas; <br />? At the base of exposed slopes; <br />? Along streets, curbs, and property lines (below <br />disturbed areas). <br />The following method should be used to construct a straw bale sediment <br />barrier. <br />A. Dig a 6-inch deep by 2-foot wide <br />trench. Align trench along contour but curved <br />slightly uphill so runoff cannot <br />escape around the end bales. <br />B. Place bales in trench with ends <br />tightly abutted. <br />1 rt4ow C. Anchor each bale with 2 re-bars or wood <br />:`'• stakes hammered 11/2 to 2 feet into the <br />ft, I LIV ! ground. Angle first stake in each bale <br />correct Incorrect toward the previously laid bale. <br /> <br />D. Wedge loose straw between bales. <br />Backfill and compact the excavated soil <br />against the uphill side of the barrier. <br />16MMM <br />?n+ar•? <br />Ku+orr• <br />E. When <br />bales on <br />you can pile <br />behind the <br />them in place. <br />installing <br />pavement, <br />gravel or rock <br />bales to hold <br />.y <br />r <br />FLOW <br /> <br /> <br />10 <br />"l <br />darn. <br />