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Parrett LDS Parking Lot Expansion <br />Storm Drainage Report <br />NO.4 - CONTROL STRUCTURE/FLOW RESTRICTOR <br />Maintenance Defect <br />Condition When Maintenance is Needed <br />Results Expected When <br />Component <br />Maintenance Is Performed <br />General Trash and Debris <br />Distance between debris build-up and bottom of <br />All trash and debris removed. <br />(Includes Sediment) <br />orifice plate is less than 1-1/2 feet. <br />Structural Damage <br />Structure is not securely attached to manhole wall <br />Structure securely attached to <br />and outlet pipe structure should support at least <br />wall and outlet pipe. <br />1,000 Ibs of up or down pressure. <br />Structure is no: in upright positior (allow up to <br />Structure in correct position. <br />10% from plumb). <br />Connections to outlet pipe are not watertight and <br />Connections to outlet pipe are <br />show signs of n'st. <br />water tight; structure repaired or <br />replaced and works as <br />designed. <br />Any holes --other than designed holes —in the <br />Structure has no holes other <br />structure. <br />than designed holes. <br />Cleanout Gate Damaged or Missing <br />Cleanout gate is not watertight or is missing. <br />Gate is watertight and works as <br />designed. <br />Gate cannot be moved up and down by one <br />Gale moves up and down easily <br />maintenance person. <br />and is watertight. <br />Chain leading to gate is missing or damaged. <br />Chain is in place and works as <br />designed. <br />Gate is rusted over 50% of its surface area. <br />Gate is repaired or replaced to <br />meet design standards.. <br />Orifice Plate Damaged or Missing <br />Control device is not working properly due to <br />Plate is in place and works as <br />missing, out of place, or bent orifice plate. <br />designed. <br />Obstructions <br />Any trash, debris, sediment, or vegetation <br />Plate is free of all obstructions <br />blocking the plate. <br />and works as designed. <br />Overflow Pipe Obstructions <br />Any trash or debris blocking (or having the <br />Pipe is free of all obstructions <br />potential of blocking) the overflow pipe, <br />and works as designed. <br />Manhole See 'Closed Detention Systems' Standards No. 3 See "Closed Detention Systems' <br />Standards No. 3 <br />Catch Basin See 'Catch Basins' Standards No. 5 See'Catch Basins' Standards <br />No. 5 <br />NO. 5 - CATCH BASINS <br />Maintenance Defect Conditions When Maintenance is Needed <br />Results Expected When <br />Component <br />Maintenance is performed <br />General Trash 8 Debris Trash or debris of more than 112 cubic foot which is <br />No Trash or debris located <br />(includes Sediment) located immediately in front of the catch basin <br />immediately in front of catch <br />opening or is blocking capacity of the basin by <br />basin opening. <br />more than 10% <br />PB8006r06113 Everett Los Perking WtsTexrlStorm ReporW(16113 Drainage Report Revised 01.10.08.doc Page 31 of 36 <br />