The replacement of the Portland Avenue Bridge in Bloomington, Minnesota, serves as a premier example of how strategic logistics and precast innovation can solve complex infrastructure challenges. Tasked with accommodating the widening of I-494, County Prestress manufactured and delivered 34 prestressed bridge girders during a critical window in September 2025. Because the project took place over one of the state's busiest transit arteries, minimizing traffic disruption was the primary objective. By opting for a precast solution, the project team was able to expedite the construction timeline significantly, ensuring the structural components arrived ready for immediate installation.
To honor strict overnight lane closure windows, delivery crews unloaded a girder every 20 minutes between 10 PM and 4 AM. This pace allowed all 34 girders to be delivered in two nights, limiting highway lane closures to 12–14 hours. This model ensured I-494 reopened to commuters each morning, avoiding the delays typically associated with urban bridge replacements. Beyond the logistics, the choice of prestressed concrete ensures the Portland Avenue Bridge will remain for decades. Specified for their exceptional strength-to-weight ratio and resistance to cracking, these girders are designed to withstand heavy traffic demands while reducing longterm maintenance costs. County Prestress & Precast provided a solution that met demanding structural specifications and an aggressive schedule, proving that modern infrastructure upgrades don't have to come at the cost of community mobility. |