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Printed on:Wednesday 05/07/2025 08:05 AM 29C0022/AABH/152630Pageof12 <br />Department of Transportation - Division of Maintenance Structure Maintenance & Investigations <br />19 <br />234 <br />251 <br />256 <br />Pier Cap-RC <br />Pile-CISS <br />Corrosion <br />Slope Protection <br />2 <br />2 <br />2 <br />2 <br />42 <br />30 <br />30 <br />1 <br />m <br />ea. <br />each <br />ea. <br /> 42 <br /> 0 <br /> 0 <br /> 1 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 30 <br /> 30 <br /> 0 <br />SUBSTRUCTURE ELEMENT INSPECTION RATINGS AND NOTES <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br />1000 <br />SUBSTRUCTURE <br />SUBSTRUCTURE RATING =(60)5 <br />(234) Pier Cap-RC <br />(251) Pile-CISS <br />(251-1000) Corrosion <br />(256) Slope Protection <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 />The pier cap quantity includes RC caps at both abutments and at Bents 4 and 8 which were installed during the 2005 retrofit. <br />There were no significant defects noted. <br />Non-Routine Inspection Element Notes: <br />Non-Routine Inspection Element Notes: <br />UWI (11/09/2020): The quantity of ELI element 251, Steel Shell Foundation Pile filled with Concrete, was revised from 20 to 30 to <br />reflect the number of piles currently exposed at Pier 11. Two previously exposed piles at Pier 12 were not exposed during this <br />inspection. All exposed steel piles have 3 mm rust blisters on their surfaces. The scour defect was not applied because the higher CS <br />3 corrosion defect supersedes the scour defect which is condition state 2. SM&I Hydraulics is aware of the scour issues at this bridge <br />as noted in the body of the report. <br />UWI (11/09/2020): The 30 exposed piles are in condition state 3 due to corrosion with minor section loss not requiring a structural <br />review. During the 2015 UWI a Level III ultrasonic thickness test of one exposed pile indicted a remaining steel thickness of 0.164 <br />inches. The plans indicate a minimum as-built thickness of 7 gauge (approximately 0.18 in.). The section loss is not a concern at this <br />time. All exposed piles were placed in condition state 3. <br />600 <br />601 <br />Support System - Structural <br />Support System - Mechanical <br />Lubrication <br />Wear(Electrical) <br />2 <br />2 <br />2 <br />2 <br />1 <br />2 <br />1 <br />1 <br />ea. <br />ea. <br />ea. <br />ea. <br /> 1 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 1 <br /> 0 <br /> 1 <br /> 0 <br /> 1 <br /> 1 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br /> 0 <br />MECHANICAL/ELECTRICAL ELEMENT INSPECTION RATINGS AND NOTES <br />9001 <br />9002 <br />MECHANICAL/ELECTRICAL <br />(600) Support System - Structural <br />(601) Support System - Mechanical <br />(601-9001) Lubrication <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 />Trunnions are mounted in the reinforced concrete bascule pits. The bascule pits were flooded at the time of inspection. The sump <br />pumps were working but no water was being pumped out. Due to the water, only a partial opening was performed. Visible portions <br />of supports for trunnions and other equipment in the bascule pit were in good condition with no defects noted. <br />The bridge mechanical support system consists of three components. The trunnions, center lock system, and the heel lock system. <br />The trunnions have a tapered shaft and are located on the heel of the span below the deck in the counterweight pit of each bascule <br />leaf. The center lock system is located mid span, and the heel lock systems are located a level below the drive machinery in the <br />counterweight pit on each side of the span. <br />The center lock system consists of two lock bars operated by cams connected to a common drive shaft. The drive shaft is driven by <br />a series of pinion, and bull gears. The gear train is driven by a Westinghouse 3 HP, 1100 RPM motor with drum motor brake on the <br />back of the motor. The motor drives an enclosed gear reducer with a single output shaft. The gear reducer is Western Gear 60:1 <br />ratio. The output shaft has a pinion gear that drives a bull gear which turns a shaft with a cam connected to a common drive shaft. <br />The common shaft pulls and drives the lock bars on the east and west sides of the north span. The bars engage receivers on the <br />south span. The drive motor and gear reducer are located on the south side of the north span. <br />The heel lock system consists of two hold down lock bars that fit into pockets on the heel of each bascule leaf. A single, 1 HP 184 <br />Frame, 955 RPM motor drives an enclosed gear reducer which drives a pinion and bull gear. The bull gear drives a shaft with cams <br />that pull or push on crank arms to lift or lower the heel lock hold down bars.