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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br />Control StructurelFlow Restrictor <br />Date <br />Drainage <br />System Maintenance Activitie� and G�nditions <br />Frequency Feature ✓ ✓� ✓ Probiem Conditions to Check For That Should Exist <br />M General Trash and Debris Material exceeds 25 percent of sump depth or 1 Control structure orifice is not blocked. Alf <br />(Includes foot below orifice plate. trash and debris removed. <br />Sediment) <br />A General Structura! Damage Structure is not securely attached to manhole Structure securely attached to wall and outlet <br />wali. pipe. <br />A General Structural Damage Structure is not in upright position (allow up to Structure in carrect position. <br />10 percent from plumb). <br />A Genera{ Structural Damage Connections to outlet pipe are not watertight and Connections to outlet pipe are water tight; <br />show signs of rust. structure repaired or reptaced and works as <br />designed. <br />A General Structural Damage Any holes—other than designed holes—in the Structure has no holes other than designed <br />structure. holes. <br />A Cleanout Damaged or Cleanout gate is not watertight or is missing. Gate is watertight and works as designed. <br />Gate Missing <br />A Cleanout Damage� or Gate cannot be moved up and down by one Gate moves up and down easily and is <br />Gate Missing maintenance pe�son. watertight <br />A Cleanout Damaged or Chainlrod leading to gate is missing or Chain is in place and works as designed. <br />Gate Missing damaged. <br />A Cleanout Damaged or Gate is rusted over 5� percent of its surface Gate is repaired or replaced to meet design <br />Gate Missing area. standards. <br />A Orifice Damaged or Control device is not working properly due to Plate is in place and works as designed. <br />Plate Missing missing, out of place, or bent orifice plate. <br />M,S Orifice Obstructions Any trash, debris, sediment, or vegetation Plate is free of all obstructions and works as <br />Plate blocking the plate. designed. <br />M,S Overflow Obstructions Any trash or debris blocking (or having the Pipe is free oi all obstrucYions and works as <br />Pipe potential of blocking) the ovefiow pipe. designed. <br />A Manhole Cover Not in Place Cover is missing or only partially in place. Any Manhole is closed. <br />open manhole requires maintenance. <br />Appendrees <br />F-12 <br />