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burying and smothering vegetation. <br /> . Vegetative buffer zones for streams, lakes or other waterways shall be established by the <br /> local permitting authority or other state or federal permits or approvals. <br /> Maintenance Standards <br /> Inspect the area frequently to make sure flagging remains in place and the area remains undis- <br /> turbed. Replace all damaged flagging immediately. Remove all materials located in the buffer area <br /> that may impede the ability of the vegetation to act as a filter. <br /> BMP C103: High-Visibility Fence <br /> Purpose <br /> High-visibility fencing is intended to: <br /> . Restrict clearing to approved limits. <br /> . Prevent disturbance of sensitive areas,their buffers, and other areas required to be left undis- <br /> turbed. <br /> . Limit construction traffic to designated construction entrances, exits, or internal roads. <br /> . Protect areas where marking with survey tape may not provide adequate protection. <br /> Conditions of Use <br /> To establish clearing limits plastic,fabric, or metal fence may be used: <br /> . At the boundary of sensitive areas,their buffers, and other areas required to be left uncleared. <br /> . As necessary to control vehicle access to and on the site. <br /> Design and Installation Specifications <br /> High-visibility plastic fence shall be composed of a high-density polyethylene material and shall be at <br /> least four feet in height. Posts for the fencing shall be steel or wood and placed every 6 feet on center <br /> (maximum) or as needed to ensure rigidity.The fencing shall be fastened to the post every six inches <br /> with a polyethylene tie.On long continuous lengths of fencing, a tension wire or rope shall be used as <br /> a top stringer to prevent sagging between posts.The fence color shall be high-visibility orange.The <br /> fence tensile strength shall be 360 lbs/ft using the ASTM D4595 testing method. <br /> If appropriate install fabric silt fence in accordance with BMP C233: Silt Fence to act as high-visibility <br /> fence. Silt fence shall be at least 3 feet high and must be highly visible to meet the requirements of <br /> this BMP. <br /> Metal fences shall be designed and installed according to the manufacturer's specifications. <br /> Metal fences shall be at least 3 feet high and must be highly visible. <br /> Fences shall not be wired or stapled to trees. <br /> 2019 Stormwater Management Manual for Western Washington <br /> Volume ll- Chapter 3-Page 274 <br />