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Cherwell Creek Bridge Replacement

ClientIsaac Regional Council
Value$5.9M
StateQueensland
CompletedSeptember 2017

The Isaac Regional Council engaged VEC to construct a newly designed bridge to replace the existing low lying bridge which is over-topped often each year. Just in 2017 alone Cherwell Creek flooded and the road was blocked for approximately 2 days from the deluge following Tropical Cyclone Debbie.

Isaac Regional Council (IRC) engaged VEC to construct a new 3 span 77m long bridge across Cherwell Creek, located on the Peak Downs Mine Road, South of Moranbah. This road and old bridge was travelled by some of the heaviest traffic in Queensland due to the large coal mines in the area. The old bridge was located across Cherwell Creek and was low lying. In 2017 during construction, the old bridge over-topped twice in March and May respectively. This caused delays to traffic for up to two days with an alternative route adding another three hours to the journey.

The new bridge consisted of 750 diameter bored piers founded into bedrock some 18 to 20m below the creek bed. The pile caps, abutments and pier walls were reinforced concrete, cast insitu which required significant scaffold systems to support the walls and headstocks. The deck consisted of 51 Main Roads standard prestressed deck units, with a topping slab securing the precast units. Asphalt deck wearing surface was placed over the deck slab and a regular performance bridge barrier formed the edge protection. The bridge approaches included approximately 1km of roadworks on a new alignment parallel to the existing bridge. The road works included in areas some subgrade replacement, cut and fill and pavement design consisting of MR Type 2.5, 2.3 and 2.1 road base.

Head Office

10b Industrial Dr, Ulverstone,
TAS 7315

PO Box 812
Ulverstone, TAS 7315
info@vec.com.au

Phone +61 3 6425 6530
Fax +61 3 6425 6112

Hobart Office

Level 3, 116 Bathurst Street
Hobart, TAS 7000

PO Box 812
Ulverstone, TAS 7315
info@vec.com.au

Phone +61 3 6425 6530
Fax +61 3 6425 6112

Melbourne Office

Level 10, 567 Collins Street, 
Melbourne, VIC 3000

PO Box 812 
Ulverstone, TAS 7315
info@vec.com.au

Phone +61 (03) 9278 5100
Fax +61 3 6425 6112

Queensland Office

135 Coronation Drive
Milton, QLD 4064

PO Box 812 
Ulverstone, TAS 7315
info@vec.com.au

Phone +61 3 6425 6530
Fax +61 3 6425 6112