Fortec completed the Design and Construction of the two bridges in the remote and beautiful Kimberley Region of Western Australia, 3,000 km north of Perth.
The project involved two existing single-lane bridges being replaced with dual-lane bridges over Frog Hollow Creek and Tickalara Creek on the Great Northern Highway.
The bridges were constructed with non-traditional post-tensioned TeeRoff beams, varying in length from 26 to 29 m. The 68 –75 Tonne beams were precast off-site and transported 1,000 km to the respective bridge sites by road.
The bridge abutments were each supported by four 750 mm-diameter, 6–9 m-deep bored piles with a 1,500 mm rock socket.