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APPENDIX A hfAIMENANCE STANDARDS FOR PRIVA'IFLY MA[NCAINED DRAINAGE FACILTfIES <br /> C)Wetponds <br /> � Malntenance Delect Condition When Maintanance is Neetled Hesulq Eup�chd When <br /> Component Maintenann ia PeAormed <br /> Wetpond ' Vegetation Vegetadon sudi as gress ard weade nead to be Vegetatlon should be mowod to <br /> mowed when it starts to impode aeslheUa ot pond. 4 to 5 inehes in helght. Trees <br /> . Mowing is genera0y required when height exeeeds arW bushes should be removed <br /> iB-inchas.Mowed vegetadon sM�dd be removed where tt�ey are interfering xAtli <br /> irom areas when it coWd enter ihe pond,either pond malntstmnce aetivities. <br /> when the pond level rises,or by rainfali runofl. <br /> Trash and Debris Aecumula8on Uwt axceeds 1 CF par 7000-SF of Trash and debris rertaved from <br /> pond area. p�d. <br /> INed Outlel Pipe InIeV Outlot pipe doggad with sediment and/or No dogphg or hlakaga In tM <br /> dabris material. inlat and outlet piphg. <br /> Sediment Sediment acctimWatlons in pond bottom that Removal of semrnerrt irom porM <br /> Aceumulation in Pond exceods ttie depth ol sediment zone plus Einches, bottom. <br /> Bottom usually the first cell. . <br /> Oil Sheen on Water Prevalen;and visible oil sheen. Removal ol sedunent hom pond <br /> twn«n. <br /> Eroston Erosiun o}the pond's side sbpes anN a scouring ot Sbpas should be stabllizad by <br /> the pond bottom,that exceeds 8-inches,or where using propar arosion conLd <br /> conUnued arosion Is prevaleM. � measures,and repair methods. <br /> Settlement ol Pond My part of these componenb that has settled 4- Dikal bertn Is repaired to <br /> Dikc!Berm inches or lower tt�an ihe dssign elevatlon,or spedM1pdons. <br /> inspector detertnines dike/bertn is unsound. <br /> Rock Wlndow Rocic wfndow is cbgged with sediment wndow is Irae of sedment and <br /> debils. <br /> ( Ove�flow Spiliway Rock is missing and soil is e�osed at top of RepWce rocks to spacificatlons. <br /> spitlway or outside slope. <br /> � ' <br /> q��/�g 1998 Surtace W a�cr Daign Manual <br /> A-12 <br />