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VECE~ATIVE RIIFFERS SPECIFICATIONS <br />• <br />Purpose: Vegetative buffer areas have been shown [o be effective in reduc- <br />ing on-site erosion. Leaf states in "Evaluation of On-Site Ero- <br />sion Control Effectiveness and Sediment Yield a[ Orchard Valley <br />Ptine" - Surface l,'ater Appendix - that calculations developed by <br />Parker (1967) show that buffer strips 256 fee[ wide will control <br />virtually all sediment from culvert outfalls. <br />Usage: Vegetative buffers will be used at, but are no[ limited [o use a[, <br />the following: <br />1. Areas where sediment yield from disturbed areas is deemed low <br />by Colorado t2estmoreland Professional Civil Eneineer. <br />2. Areas where runoff is not directed into sedimentation ponds <br />u <br />3. Areas where temporary construction nigh[ significantly raise <br />sediment yield. <br />Construction: Vegetative buffers will be constructed by planting [he area with <br />an approved seed mixture using approved preparation methods. <br />Inspection: All vegetative buffers will be inspected quarterly, as follows: <br />1. Visual inspection for effectiveness. <br />2. Photographic loQ of vegetative buffers. <br />3. A written log of [he depth of sediment deposited, will be kept <br />with ra•adinVS taken off a €raduated stake. <br />All inspection forms will be filed at the Orchard Valley Nine of- <br />fice. <br />