It is an economical way to deter trespassers from your jobsite, combined with the benefits of silt fence. Adapted from michigan department of transportation 2003 standard specifications for. Sediment runoff from a hill is one of the easiest ways to disrupt a construction site or pollute a fresh water source. Silt fence standard fencing and wire back fencing models. These are notes and specifications for typical installations of silt fences around construction sites with significant areas of disturbance. Chain link fence shall be fastened securely to the fence posts with wire ties or staples. A silt fence is a woven geotextile fabric attached to wooden posts and trenched into the ground. Cross barriers barriers that limit water movement along the silt fence should be a minimum of and a maximum of 12 the height of the silt fence. The standard drawings manual is prepared under the direction of the county engineer. All silt fence shall be placed as close to the contour as possible. See detail sf1 for proper silt fence installation, which involves proper trenching, staking, securing the.
The three principal aspects of silt fence design are. Sediment barriers sd1 type address contact product sd1. Soil type, slope, slope length, rainfall, and site configuration are all important elements in determining the adequate silt fence protection for a site, and to what extent it. The contractor may provide woven or nonwoven geotextile fabric or polypolyreinforced sheeting. Silt fence is made of a woven polypropylene material and it is nonbiodegradable.
An update of the entire manual was completed in 2012. See specifications manual item 648s 1 and standard specifications manual item 648s for details 1. Bsrf priority 1 green band heavy duty silt fence bsrf priority 1 specification and. January 1, 2016 check dam cd source address contact product type cd shbfs filtrexx 35481 grafton eastern rd grafton oh 44044. Install additional silt fence systems as directed by the rce where deficiencies exist. Grogreen cpop polypropylene on polypropylene silt fence system is designed as an alternative to type c silt fence steel posts with wire reinforcement. The system utilizes wood stakes and a specific method of attachment. Silt fences use a special material that catches the sediment and filters it out of the. See installation specifications the fabric, when installed as specified, produces a proven system with superior filtering capabilities in slurry conditions. Provide sufficient room for runoff to pond behind the fence and to allow sediment removal equipment to pass between the silt fence and toes of slopes or other obstructions. This standard detail is a potential add on sheet to a set of construction drawings for projects that will involve large areas of disturbed land.
The silt fence detains sedimentladen water, promoting sedimentation behind the fence. Silt fence slows the water long enough to cause sediment to drop out, allowing water to pass through the fabric. The first part, general, provides a description of the type of work, as well as any specific requirements of the project. Silt fence installation sha ll be in the locations shown on the plan v iew and may. Bsrf priority 2 nonwoven medium duty silt fence black. Silt fence, a temporary linear filter structure for efficient erosion control, is composed of premium geotextile fabric supported by wire mesh fence and metal posts, and sorts of accessories. Listed above are links to development regulation standard drawing files in either pdf or dwg formats. Use in environmentally sensitive areas and in areas of inadequate rightofway in place of silt ditch. Shop hanes geo components 100ft x 36in black contractor silt fence in the erosion fencing section of. The height of a silt fence shall be a minimum of 16 inches above the original ground surface and shall not exceed 34 inches above ground elevation. Tenax silt fence is the ideal barrier for tenax silt fence is the ideal barrier for sediment control around construction sites or wherever there is bare or disturbed earth. Silt fence sf sc1 november 2010 urban drainage and flood control district sf1 urban storm drainage criteria manual volume 3 photograph sf1.
An economical technique for measuring hillslope soil erosion peter r. Chain link fence vehicle gate installed on concrete wall. Skimmer basin skimmer basin skimmer basin skimmer detail. The fabric is a 36 wide, nonwoven spunbond polyester fabric. This system is designed to be used as a temporary sediment barrier for use in areas where runoff flows of velocities are high. Generally, silt fence is constructed of porous woven geotextile fabric attached to wooden posts. This engineered geotextile is stabilized to resist degradation due to ultraviolet exposure. If standard fabric is used in combination with wire mesh, posts should be spaced no more than 10 feet apart. Stabilized construction entrance 1 of 2 pdf part 1 of 2. The drainage area for a typical silt fence installation at the bottom of a slope shall not exceed 10,000. Provide super duty sd silt fence consisting of concrete or water filled jersey barriers with fabric wrapped around the front face of the barrier. This handbook includes new and revised details for the various practices that are used in the development of erosion and sediment control plans. Purpose the purpose of a silt fence is to reduce runoff velocity and effect deposition of transported. Copies of these details are made available below in both adobe portable document format pdf and autocad drawing dwg file formats.
Silt fence with no trespassing logo preprinted on d. The purpose of silt fence is to protect downslope surface waters and. A file for use on engineering plan detail sheets reflecting lake countys minimum construction entrance requirement. All plans, standard detail drawings, or specifications shall include schedule for installation, inspection, and maintenance.
Pdf bottom drain bda500 drawing detail attachment pdf bda500 application installation pdf bda500 cad file zipped dwg perimeter protection silt fence. Used as a vertical permeable interceptor, it is designed to greatly trap and allow settlement of soil particles from sedimentladen water or limit the. Adobe acrobat reader is necessary to view the pdf files. Hard copies of this manual will no longer be provided. Black super silt fence kit is used in high water flow areas where a lot of sediment is present. All drawings will be posted and maintained on this website. The following layout and installation guidance can improve.
Subsequent updates on specific drawings occur biannually, or on an as needed basis. Provide preassembled pa silt fence consisting of a woven geotextile fabric supported by wood posts. Silt fence sediment control products acf environmental. It also lists what work activities are included in each bid item and how each item will be measured and paid for. When two sections of filter cloth adjoin each other. Silt fence should be installed where sheet flow runoff. A silt fence is made of a woven geotextile that has been.
Specifications manual iowa statewide urban design and. A mulch sock is mulch material encased in mesh to form a tuberoll. The following are a selection of 10 iswm construction control bmp schematics chosen to be provided in standard details. Silt fence detail pdf a file for use on engineering plan detail sheets reflecting lake countys minimum silt fence requirements. Soil type, slope, slope length, rainfall, and site configuration are all important elements in determining the adequate silt fence protection for a site, and to what extent it fits the 100 ft per 10,000 sq ft ruleofthumb. A silt fence is a temporary sediment barrier made of. Adapted from oakland county michigan erosion control manual. Handbooks construction site best management practices bmps manual. They are intended to be used as a guide in the preparation and submittal of plans for private development and city contract projects within the city of raleigh and the citys extraterritorial jurisdiction. Supplemental technical specification for silt fence systems. Geosynthetic fabric to be fastened securely to fence posts with wire ties or staples. Wire fence reinforcement for silt fences using standardstrength filter cloth shall be a minimum of 14 gauge and shall have a maximum mesh spacing of 6 inches.
Silt fence is a linear fence installed at the edge of earth disturbances. Details from the 2011 maryland standards and specifications for soil erosion and sediment control. The woven geotextile used on tenax silt fence is designed to filter out sediment from construction site runoff, yet allow clean water to. The height of the silt fence should be between 16 and 34 above the grade. King county road design and construction standards 2016 road standards. A silt fence is a temporary filter fabric which is attached to supporting posts and entrenched into. Details from the 2011 maryland standards and specifications. The specifications manual is set up in a consistent threepart format. Silt fence se1 january 2003 california stormwater bmp handbook 3 of 8 construction. Silt fence detail figure 252 silt fence and installation detail drawsri.