Silt Fence SC 1 California

Silt Fence Sc 1 California-Free PDF

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Silt Fence SC 1,Standards and Design and Layout, Specifications The maximum length of slope draining to any point along the silt fence shall. be 61 m 200 ft or less, Slope of area draining to silt fence shall be less than 1 1 V H. Limit to locations suitable for temporary ponding or deposition of sediment. Fabric life span generally limited to between five and eight months Longer. periods may require fabric replacement, Silt fences shall not be used in concentrated flow areas. Lay out in accordance with Pages 5 and 6 of this BMP. For slopes steeper than 1 2 V H and that contain a high number of rocks or. large dirt clods that tend to dislodge it may be necessary to install additional. protection immediately adjacent to the bottom of the slope prior to installing. silt fence Additional protection may be a chain link fence or a cable fence. For slopes adjacent to water bodies or Environmentally Sensitive Areas. ESAs additional temporary soil stabilization BMPs shall be used. Silt fence fabric shall be woven polypropylene with a minimum width of. 900 mm 36 inches and a minimum tensile strength of 0 45 kN The fabric. shall conform to the requirements in ASTM designation D4632 and shall. have an integral reinforcement layer The reinforcement layer shall be a. polypropylene or equivalent net provided by the manufacturer The. permittivity of the fabric shall be between 0 1 sec 1 and 0 15 sec 1 in. conformance with the requirements in ASTM designation D4491 Contractor. must submit certificate of compliance in accordance with Standard. Specifications Section 6 1 07, Wood stakes shall be commercial quality lumber of the size and shape shown. on the plans Each stake shall be free from decay splits or cracks longer than. the thickness of the stake or other defects that would weaken the stakes and. cause the stakes to be structurally unsuitable, Bar reinforcement may be used and its size shall be equal to a number four.
4 or greater End protection shall be provided for any exposed bar. reinforcement, Staples used to fasten the fence fabric to the stakes shall be not less than. 45 mm 1 75 inches long and shall be fabricated from 1 57 mm 0 06 inch or. heavier wire The wire used to fasten the tops of the stakes together when. Caltrans Storm Water Quality Handbooks Section 4, Construction Site Best Management Practices Manual Silt Fence SC 1. March 1 2003 2 of 6,Silt Fence SC 1, joining two sections of fence shall be 3 05 mm 0 12 inch or heavier wire. Galvanizing of the fastening wire is not required,Installation. Generally silt fences shall be used in conjunction with soil stabilization. source controls up slope to provide effective erosion and sediment control. Bottom of the silt fence shall be keyed in a minimum of 150 mm 12 inches. Trenches shall not be excavated wider and deeper than necessary for proper. installation of the temporary linear sediment barriers. Excavation of the trenches shall be performed immediately before installation. of the temporary linear sediment barriers, Construct silt fences with a set back of at least 1m 3 ft from the toe of a.
slope Where a silt fence is determined to be not practical due to specific site. conditions the silt fence may be constructed at the toe of the slope but shall. be constructed as far from the toe of the slope as practical. Construct the length of each reach so that the change in base elevation along. the reach does not exceed 1 3 the height of the barrier in no case shall the. reach exceed 150 meters 490 ft, Cross barriers shall be a minimum of 1 3 and a maximum of 1 2 the height of. the linear barrier, Install in accordance with Pages 5 and 6 of this BMP. Maintenance and Repair undercut silt fences,Inspection. Repair or replace split torn slumping or weathered fabric. Inspect silt fence when rain is forecast Perform necessary maintenance or. maintenance required by the Resident Engineer RE, Inspect silt fence following rainfall events Perform maintenance as. necessary or as required by the RE, Maintain silt fences to provide an adequate sediment holding capacity.
Sediment shall be removed when the sediment accumulation reaches one. third 1 3 of the barrier height Removed sediment shall be incorporated in. the project at locations designated by the RE or disposed of outside the. right of way in conformance with the Standard Specifications. Silt fences that are damaged and become unsuitable for the intended purpose. as determined by the RE shall be removed from the site of work disposed of. outside the highway right of way in conformance with the Standard. Specifications and replaced with new silt fence barriers. Caltrans Storm Water Quality Handbooks Section 4, Construction Site Best Management Practices Manual Silt Fence SC 1. March 1 2003 3 of 6,Silt Fence SC 1, Holes depressions or other ground disturbance caused by the removal of the. temporary silt fences shall be backfilled and repaired in conformance with the. Standard Specifications, Remove silt fence when no longer needed or as required by the RE Fill and. compact post holes and anchorage trench remove sediment accumulation. and grade fence alignment to blend with adjacent ground. Caltrans Storm Water Quality Handbooks Section 4, Construction Site Best Management Practices Manual Silt Fence SC 1. March 1 2003 4 of 6,Silt Fence SC 1,Caltrans Storm Water Quality Handbooks Section 4.
Construction Site Best Management Practices Manual Silt Fence SC 1. March 1 2003 5 of 6,Silt Fence SC 1,Caltrans Storm Water Quality Handbooks Section 4. Construction Site Best Management Practices Manual Silt Fence SC 1. Silt Fence SC 1 BMP Objectives Standard Symbol Soi l Stabilization Se diment Control T racking Control W ind Erosion Control N on Storm Water Management Materials and Waste Management Definition and Purpose A silt fence is a temporary linear sediment barrier of permeable fabric designed to intercept and slow the flow of sediment laden sheet flow runoff Silt fences allow sediment to

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