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Bidjugde
JOB
Yountville Crossroad Bridge Repair
BID DATE
05/14/20 - 11:30
AGENCY
Napa County
ESTIMATE
$200,000
SCOPE
The proposed project would include repairing the following items that were damaged during the 2014 Earthquake. • Replace the 2 ½”x9”x18” elastomeric bearing pads (total 5) at abutment 1 using hydraulic jacks. The hydraulic jacks will be supported on temporary shoring located at abutment 1 front face and supported on the exposed abutment footing. The four hydraulic jacks will simultaneously lift the bridge 1/8” enough to disengage the bearing pads. Traffic will not be allowed on the bridge during the lifting operation to replace the existing bearing pads. • Reconstruct 40 feet long by 39’-6” wide roadway approaches. The roadway approaches consist of 0.3 feet of asphalt concrete (AC) and 1.3 feet of aggregate base (AB). All work will be done from at the roadway surface. • Replace the cracked 2.2’ x 2.5’ x 4.5’shear key at abutment 1 south by removing the existing concrete and protecting the existing shear key reinforcing bars. Dowels will be added to connect the replacement shear key to the abutment by jack hammering the spalled concrete. A scaffolding will be required adjacent to the abutment 1 south key. All work will be done on the side of the abutment, away from the banks of the Napa River. The immediate area below scaffolding will be protected. No construction debris will be allowed to enter the River. No vegetation will be removed. Minor trimming of vegetation, if any, is expected along the shear key repair area. Yountville Crossroad Bridge consist of a six spans continuous pre-cast/ pre-stressed (PC/PS) “I” Girders (total 5) with reinforced concrete deck and reinforced concrete pier walls with reinforced cantilever seattype abutments and monolithic wingwalls. The abutments and pier wall walls are supported on concrete piers. The bridge is approximately 39’- 5” wide and 96 feet long. The road width is approximately 32 feet wide. James.Reese@countyofnapa.org and Graham.Wadsworth@countyofnapa.org

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