Unique structures on railway line
Sign to highlight historic bridges
A SIGN highlighting the Degilbo-Mundubbera Railway Bridges built between 1905-1914 now takes pride of place in Biggenden, Gayndah and Mundubbera.
North Burnett Regional Council mayor Rachel Chambers presented the sign to Biggenden representatives, Cr Robbie Radel, Biggenden Chamber's Sue Telford and Biggenden Men's Shed Os Blacker.
William Pagan, who was chief engineer Queensland Railways from 1902-1911, designed the all structures on the Degilbo-Mundubbera Railway bridges built during this period.
The variety of designs he used for these bridges show many innovations including the use of parts from previously constructed bridges which resulted in better or less costly structures.
The variations in type and proximity to each other on the same railway line are unique.
The first bridge to be built was the elegant Chowey Bridge, an unreinforced concrete structure with a main span of 24 metres supporting four spandrel arches and two side arches.
It was built in nine months and opened in December 1905. Total length is 33.5 metres.
The next bridge along the line, the Burnett River Bridge, is almost 1000 feet (294 metres) long and with 58 spans, this was the second longest timber trestle rail bridge in Queensland.
It had significant bracing to help it withstand floods but it was extensively damaged in 2013.
Other bridges on the railway line
The Upside Down Bridge at Iderway is underslung pin-jointed steel fish-belly truss spanning 45 metres supporting longitudinal steel beams with timber trestle approaches. Total length 69 metres
Humphery No 2 (48 metres long) and Steep Rocky Creek (58 metres long) are both early examples of reinforced concrete in Australia. Each span is “discontinuous” (separate from its neighbours). Steep Rocky Creek has side spans of rolled steel joists.
Humphery No 1 (68 metres long) has two riveted lattice truss spans and rolled steel joist side spans on concrete piers. .
Reids Creek (106 metres long) had four riveted steel Pratt Truss spans.
Badly damaged in 2013, only the concrete piers remain.
Bayntons Bridge is made with a riveted lattice truss main span on concrete piers with timber trestle approaches. Total length 55 metres.
Castor Oil Gully Bridge has riveted lattice truss main span with rolled steel joist spans either side on concrete piers and timber trestle approaches. Total length 86 metres.
Anderson’s Gully has lattice truss main span and rolled steel joist side spans on concrete piers with timber trestle approaches. Total length 76 metres. Slab Creek Bridge is a two riveted plate girder central spans on concrete piers with timber trestle approaches. Total length 66.5 metres.
Philpott Creek is a riveted plate girder central span flanked by rolled steel joist spans on concrete piers with timber trestle approaches. It’s total length is 70 metres.
HIGHLIGHTING BRIDGES: A sign depicting railway bridges from Degilbo to Mundubbera was presented to Biggenden representatives, Cr Robbie Radel, Biggenden Chamber's Sue Telford and Biggenden Men's Shed Os Blacker by NBRC mayor Rachel Chambers.