Movable Span Bridges Project, San Joaquin County, CA

The work, in general, consists of repairing and/or replacing mechanical and electrical equipment at each of the four bridges. Bridge 29C-108, Bacon Island Road over Middle River: Replacing eddy current drive controller, Furnish and Install new Swing span control switch, Furnish and install related logic to eddy current drive, Furnish and install new flashing beacon unit, Providing interposing relay for Control Relay 12 (CR 12) or replace CR 12 to reduce the amount of current the relay needs to operate, Furnish and install new twisted shielded pair for MCC, Furnish and install armored instrumentation cable, Replacing the secondary gearboxes, Replacing Hydraulic Power Units (HPUs) of the east and west rest pier machinery systems, Replacing all flexible hoses of the east and west rest pier machinery systems, and Replacing the center wedge hydraulic actuator. Bridge 29C-022, Tracy Boulevard over Grant Line Canal: Cleaning and painting corroded conduits, Replacing two severely corroded conduits, Replacing north and south traffic gates, and Re-shimming the center shear lock bar guides and receiving socket wear plates for the correct RC6 clearance/fit between the lock bars and the wear plates. Bridge 29C-114, Eight Mile Road over Bishop Cut: Repairing or replacing the northeast jack motor, Replacing gate control switches and related logic with momentary type switches, Replacing the turning machinery HPU, Repairing the cracked grout at the southwest end jack rest pier bearing plate, Cleaning and painting all non-moving bridge machinery components including the rim bearing assembly, the center pin assembly, shoe brake assemblies, center rollers, and the end jacks, Replacing all four end bearing lock actuators, Replacing all hoses and deteriorated fittings of the turning machinery system, Rehabilitating the four shoe brakes including replacement of the springs and spring rods, and Replacing the grout under the bearing end lock bearing seats on the rest piers and eliminate rubber shims. Bridge 29C-219, Eight Mile Road over Honker Cut: Adjusting and retiming all center and end wedge crankshafts and connecting rods to provide additional clearance for bridge movement, Replacing the gasoline engine in kind including new output shaft coupling, Replacing the balance wheel track mounting plate and true the elevation of the track rail, Re-shimming the balance wheels to provide clearance with the track when the swing span is in the closed and locked position, Replacing all shaft bushings of the swing span turning machinery, Replacing all jaw couplings of the swing span turning machinery, Replacing all shaft bushings of the wedge drive machinery, Replacing all jaw couplings and damaged shafts of the wedge drive machinery, Rebuilding the worm gear reducers of the wedge drive machinery, and Adding solar-powered navigation lights. DBE goal is 22%.