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, APPENDIX A MAINTENANCE STANDARDS FOR PRIVATELY MA1M'AINED DRAINAGE FACILITIFS <br /> NO.4-CONTROL SIRUCTURE/FLOW RESTRICTOR <br /> �daintenance Detect Conditlon When Malntenance is Needed Results Fspccted When <br /> ( Component Ma{ntrnence is Pertomed <br /> i <br /> General Trash and Debris Distance between debris build-up and bonom of NI irash and debris rertwved. <br /> (Includes Serliment) orifice plate is less than 1-121eet <br /> SWctural Damage Structure is not securety atWched to manhoie wall SWcture securHy atlaGied to <br /> and outlet pipe swcture sMuld support at least wall arM outlet pipe. <br /> 1,OOC Ibs of up or down p:essure. <br /> St�vcturn is not in uprighi posiGon(allow up to Slruclure in correcl positi..^.. <br /> 709;Irom plumb). <br /> Conneclions to oulle�pipe are not watertight and Connectlons to outlet pipe are <br /> show signs ot rust. water tight;sWdure repaired or <br /> replaced dnd woiics as <br /> designed. <br /> luiy holes—other than designed holes—in the Str�cture has no tales other <br /> sWcturo. than dosigned hdes. <br /> Clearaut Gate Dameged o�Missing Cleanout gate is not walertigM or is missing. Gafe is watertight and workt as <br /> � designed. <br /> Gate cannot be m , and down hy one Gate moves up and down easiy <br /> maintenance perso�. and is warertigAt. <br /> Chain leading to qate is missiny or damaged. Chain is in place and works as <br /> designed. <br /> Gate is rusted over 50%of its sudace srea. Gate is repaired or replaced to <br /> meet design standards.. <br /> � Orifice Plale Damaged or Missing Control device is not working properly due to Plate is in place and works as <br /> missing,out ol place,or bent orifice plate. designed. � <br /> Obslructions Any Vash,debris,sedimeM,or vegetation Pia�e is iree of ali obstrucGons <br /> blocking the plate. and works as designed. <br /> Overflow Pipe Obsiruclions Any Vash or deuris bixking(or having the Pipe is Iree ol ali obstructions <br /> polentlal oi biocking)the overflow pipe. and works as designed. <br /> Manhole See"Closed Detenfion Systems'Standards No.3 See'Closed Detention Systems' <br /> Slandartls No.3 <br /> Catch Basin See'Catch Basins'Standards No.5 See'Catch Basins'Standards <br /> No.5 <br /> 1 <br /> 9���98 ]998 Sudace Water Design Manual <br /> `� � Z,l <br />