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Printed on:Wednesday 05/07/2025 08:05 AM 29C0022/AABH/152630Pageof14 <br />Department of Transportation - Division of Maintenance Structure Maintenance & Investigations <br />19 <br />606 <br />607 <br />608 <br />609 <br />610 <br />612 <br />Control System - Mechanical <br />Control System - Electrical <br />Functional Obsolescence <br />Interlocking System - Mechanical <br />Interlocking System - Electrical <br />Pier Protection - Structural <br />Power System - Electrical <br />Accessibility and Labeling <br />2 <br />2 <br />2 <br />2 <br />2 <br />2 <br />2 <br />2 <br />1 <br />1 <br />1 <br />2 <br />2 <br />1 <br />1 <br />1 <br />ea. <br />ea. <br />ea. <br />ea. <br />ea. <br />ea. <br />ea. <br />ea. <br /> 1 <br /> 0 <br /> 0 <br /> 2 <br /> 2 <br /> 1 <br /> 0 <br /> 0 <br /> 0 <br /> 1 <br /> 1 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 1 <br /> 1 <br />MECHANICAL/ELECTRICAL ELEMENT INSPECTION RATINGS AND NOTES <br />9008 <br />9005 <br />MECHANICAL/ELECTRICAL <br />(605) Drive System - Electrical <br />(605-9002) Wear(Electrical) <br />(606) Control System - Mechanical <br />(607) Control System - Electrical <br />(607-9008) Functional Obsolescence <br />(608) Interlocking System - Mechanical <br />(609) Interlocking System - Electrical <br />(610) Pier Protection - Structural <br />(612) Power System - Electrical <br />Element DescriptionElem <br />No. <br />Env Total <br />Qty <br />Units <br />CS 1 CS 2 CS 3 CS 4 <br />Qty in each Condition StateDefect/ <br />Prot Defect <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />The drive system is located in the bascule pits. The drive system consists of an open gear reduction system driven by an electric <br />motor. Dual motor brakes are used to stop the movement of the span. Center shear locks are driven by an electric motor at <br />midspan. Hold downs at the live load bearings are driven by electric motor mounted on a lower deck in the bascule pit. <br />Mech/Elect (06/01/2021) Drive Motors: The motors operate normally. The motor insulation resistance value measures less than 50% <br />below the minimum recommended by NETA. <br />Drive Motor Brakes: No defects or problems observed. <br />Hold Down Motors: The motors are drawing more than their nameplate current. The motor insulation resistance value measures less <br />than 50% below the minimum recommended by NETA. <br />(5/8/2023) Condition still present. <br />Center Lock Motor: The motor operates normally. The motor insulation resistance value measures less than 50% below the minimum <br />recommended by NETA. <br />The bridge mechanical control system consists of lever actuated fully seated limit switches and two sets of bronze cams connected to <br />the drive machinery. One set gives bridge span position indications the other is connected to the heel lock system and gives the <br />indication for the hold down bar positions. <br />Bridge control systems are located in the bridge house. The control system consists of a traffic control desk and a moveable span <br />control desk. A separate electrical cabinet houses the electrical components that supply power and provide control for the electric <br />motors. <br />Mech/Elect (06/01/2021) Some components of the control desks are old and may soon be phased out by the manufacturer. The <br />components still function properly. <br />Some labels on the control desk and the electrical cabinet are fading but are still legible. <br />One of the power (kW) measuring meters on the span control desk does not work. <br />(5/8/2023) Condition still present. <br />The bridge mechanical control system consists of lever actuated fully seated limit switches and two sets of bronze cams connected to <br />the drive machinery. One set gives bridge span position indications the other is connected to the heel lock system and gives the <br />indication for the hold down bar positions. <br />The interlocking system consists of limit switches that regulate the sequence of the traffic equipment and movable span operation. <br />Pier protection consists of timber fenders with diagonal skip sheathing of Span 11, protecting Piers 11 & 12. Clearance gauges are <br />mounted on the upstream and downstream ends of the fender at Pier 11. <br />The timber fenders appeared in fair condition. One diagonal sheathing plank is missing at the center of the fender along Pier 11.