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Control StructurelFlow Reetrictor <br /> Date <br /> Drainage <br /> System Maintenance Activities and Conditions <br /> Frequency Feature 1 1 1 1 Problem Conditions to Check For That Should Exist <br /> M General Trash and Material exceeds 25 percent of sump depth or 1 Control structure orifice is not blocked. <br /> Debris(Includes foot below orifice plate. All trash and debris removed. <br /> Sediment) <br /> A General Structural Damage Structure is not securely attached to manhole Structure securely attached to wall and outlet <br /> wall. pipe. <br /> A General Structural Damage Structure is not in upright position(allow up Structure in correct position. <br /> to 10 percent from plumb). <br /> A General 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 replaced 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 Cleanout gate is not watertight or is missing. Gate is watertight and works as designed. <br /> Gate or Missing <br /> A Cleanout Damaged Gate cannot be moved up and down by Gate moves up and down easily and <br /> Gate or Missing one maintenance person. is watertight. <br /> A Cleanout Damaged Chain/rod leading to gate is missing Chain is in place and works as designed. <br /> Gate or Missing or damaged. <br /> A Cleanout Damaged Gate is rusted over 50 percent of its Gate is repaired or replaced to meet <br /> Gate or Missing surface area. design standards. <br /> A Orific Damaged Control device is not working properly due to Plate is in place and works as designed. <br /> e or Missing missing,out of place,or bent orifice plate. <br /> M,S Orific Obstructions Any trash,debris,sediment,or vegetation Plate is free of all obstructions and works <br /> e blocking the plate. as designed. <br /> M,S Overflow Obstructions Any trash or debris blocking(or having the Pipe is free of all obstructions and works <br /> Pipe potential of blocking)the overflow pipe. as designed. <br /> A Manhole Cover Not in Place Cover is missing or only partially in place. Manhole is closed. <br /> Any open manhole requires maintenance. <br />