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—� —•— DSF <br />SILT FENCE <br />Definition <br />A temporary sediment barrier consisting of a filter fabric stretched across and attached to <br />supporting posts and entrenched. The silt fence Is a temporary linear filter barrier constructed <br />of synthetic filter fabric and supported by wooden or steel posts. <br />Purposes <br />1. To intercept and detain small amounts of sediment from disturbed areas during <br />construction operations in order to reduce sediment in runoff from leaving the site. <br />2. To decease the velocity of sheet flows and low - to-moderate level concentrated flows. <br />1. set Posts. <br />Flow <br />3. Attach Fitter Material to posts or <br />insert Sewn Pockets over posts and <br />extend it into the trench. <br />2. Excavate a 4" x 4' Trench upelope <br />along the line of uprights. <br />44- �__�A <br />4. Finished section: <br />Wooden or ►� <br />Steel Fence l l <br />Posts � <br />I; <br />1� <br />Filter Fabric. <br />Attach <br />Runoff <br />From: Virginia Soil and Water Conservation Commission, 1985 <br />SURFACE ROUGHENING <br />4" <br />4' x 4" <br />Trench <br />SR <br />Definition <br />Provide a rough soil surface with horizontal depressions created by operating a tillage or <br />other suitable implement on the contour, or by leaving slopes in a roughened condition by not <br />fine-grading them. <br />Pea <br />1. To aid in seed bed preparation and establishment of vegetative cover. <br />2. To reduce runoff velocity and increase Infiltration. <br />3. To reduce runoff and wind erosion and provide for sediment trapping. <br />Haul road <br />Tracking <br />Outslope <br />Perimeter dike <br />Culvert With <br />rock as an <br />energy <br />dissipator <br />7771777. —. �. <br />f <br />Scarification <br />Rock -lined <br />channel <br />Vegetative buffer W <br />From: Environmental Protection Agency, 1976 <br />,0*a <br />I <br />I <br />} <br />I <br />I <br />fl4 <br />I _ <br />I >, <br />I <br />I g. <br />II <br />I <br />I <br />I <br />1 <br />t <br />I <br />I <br />Permit Number /(97��26� <br />Class. OPermil <br />Section /Exhibit <br />Class: vision._. /_.___- _- /_._._._ -_. _,r._ /y _._ <br />Type /Set: a �___ l <br />i Class: ❑ Report O Hydro General <br />Doc Type: <br />_ly) __ _o—❑ _— — _m__ <br />__ --- _____ ______ Bnd _ noe_❑ __npection <br />F <br />MU <br />MULCHING <br />EXISTING CONTOUR <br />PROPOSED CONTOUR <br />0 50 100 200 <br />SCALE: 1" = 100' <br />IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII <br />00015956 <br />[JAN 1 b 1996 <br />c <br />0 <br />0 <br />,r. <br />c: <br />L 13 <br />Z n <br />T-1 <br />a <br />co j <br />I� <br />1 <br />� <br />s <br />0 50 100 200 <br />SCALE: 1" = 100' <br />IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII <br />00015956 <br />[JAN 1 b 1996 <br />c <br />0 <br />0 <br />,r. <br />c: <br />L 13 <br />Z n <br />T-1 <br />a <br />co j <br />