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PBES Innovative Projects

I-65/I-59 Interchange
Location	Birmingham
State	AL
Completion Date	2002
Contact Person	Fred Conway P.E. Alabama Department of Transportation Phone: (334) 242-6007 Email: conwayf@dot.state.al.us
Description	When a fuel truck collision damaged a Birmingham bridge in the I-65/I-59 interchange, the Alabama Department of Transportation opted for a wider replacement bridge with a longer span over the northbound lanes of I-65, the main north-south route through Alabama. The interchange carries an estimated 100,000 vehicles per day, and the bridge needed to be replaced quickly. For the 140-foot main span and the 75-foot approaches, the contractor proposed a value-engineering girder re-design using AASHTO BT-54 Modified Bulb Tee girders with a 14-day strength of 8,000 psi. Traffic was stopped on I-65 north for only 12 nighttime hours to set the 15 girders on the 140-foot span overhead. Construction was completed in just 37 days.
Photo
Other Keywords	precast prestressed girders (long span)
Advantages	Minimized traffic disruption by reducing construction time and limiting lane closures.
Contract Elements	The contract time was set at 90 calendar days with a penalty of $25,000 per day for finishing late and a reward of $25,000 per day for finishing ahead of the 90-day deadline.
Photo Credits	Alabama Department of Transportation

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