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I-80 North Fork Bridges Project

Project Description

The I-80 North Fork Bridges are dual structures (one eastbound and one westbound) built in 1962 and most recently rehabilitated in 2013. These bridges cross over the North Fork Redbank Creek and Water Plant Road in Brookville Borough and Pine Creek Township, Jefferson County. Combined, these bridges are expected to carry approximately 30,900 vehicles daily. Approximately 44 percent of the traffic over the bridges is truck traffic.

The purpose of the project is to provide safe, efficient, and effective crossings of I-80 over North Fork Redbank Creek and Water Plant Road that appropriately accommodate interstate traffic with respect to connectivity, mobility, loading and geometry. The main spans of the existing bridges are steel two-girder systems with floor beams and stringers; the bridges are fracture critical since many components of the bridges are nonredundant. Both bridges have problematic fatigue details which have received multiple retrofits during the service lives of the structures. The eastbound bridge is in poor condition and the westbound bridge is in fair condition; inspections are required on a 6-month and 1-year basis, respectively. The existing bridges are separated by approximately 1,100 feet, with the Walter Dick Memorial Park located between and below the two bridges. Both bridges are reaching the end of their serviceable lifespan.

This section of I-80 has a posted speed limit of 70 miles per hour (mph) and has horizontal and vertical geometry that does not meet 70 mph design criteria. Many crashes, nearly twice the statewide average, have occurred on this segment of I-80 due to a substandard curve on the western approach to the Eastbound bridge.

In addition to the replacement of the I-80 North Fork Bridges, this project will include the replacement of the I-80 Eastbound and Westbound bridges over State Route 4003 (Jenks Street), as well as the replacement of the State Route 4005 (Richardsville Road) bridges over I-80. The project will also include the extension of the North Fork Park Culvert, which carries I-80 traffic over the tributary to North Fork Redbank Creek.

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