I-69 New Twin Bridges over Patoka River Flood Plain


  Location:

  Pike & Gibson County, Indiana

  Owner:

  INDOT

  Contractor:

  Kokosing Construction Company, Inc.

  Construction Cost:

  $35.2 Million

Project Experience

Project Description

JSE provided design services for these precast prestressed semi-lightweight concrete bulb-tee superstructure twin bridges over the Patoka River Floodplain and CR 150N in Pike & Gibson County, Indiana. These bridges are located in the seismic zone 2 which requires comprehensive seismic analysis to be performed on the substructures.

These precast prestressed bridges consist of Northbound structure with 30 spans and Southbound structure of 31 spans with total length of each structure at approximately 4400 feet. The superstructure consists of a concrete deck supported by 4 beam lines of 84” precast prestresssed bulb-tee beams. The substructures consisted of frame piers with reinforced concrete cap supported on two 4.5’ diameter columns; each column is supported on a 6’ diameter drilled shaft as foundation.

Utilizing semi-lightweight concrete beams, the bridges are able to span over 154ft-span with 84” tall beams and also reduce the seismic forces distributed to the substructures which reduce the construction and material cost.

This bridge was featured in the Spring 2013 issue of Aspire magazine. Additionally, this bridge received an Merit Award from ACEC in 2015.