Ingalara Creek railway bridge, Michelago

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Ingalara Creek railway bridge
Ingalara Creek bridge.jpg
Australia New South Wales relief location map.png
Red pog.svg
Location in New South Wales
Coordinates 35°49′07″S149°10′36″E / 35.8186°S 149.1768°E / -35.8186; 149.1768 Coordinates: 35°49′07″S149°10′36″E / 35.8186°S 149.1768°E / -35.8186; 149.1768
Carries Bombala railway line
CrossesIngalara Creek
Locale Michelago, Monaro region, New South Wales, Australia
Owner RailCorp
Characteristics
Design Queen post truss viaduct
MaterialTimber
Longest span13 metres (42 ft)
No. of spans6
Rail characteristics
Track gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge
History
Designer John Whitton
Constructed by NSW Government Railways
Construction end1889
Official nameMichelago rail bridge over Ingalara Creek; Ingalara Creek Railway Viaduct
Designated2 April 1999
Reference no.1048
Ingalara Creek railway bridge, Michelago
References
[1]

The Ingalara Creek railway bridge is a heritage-listed former railway bridge that carried the Bombala railway line across Ingalara Creek at Michelago in the Snowy Monaro Regional Council local government area of New South Wales, Australia. It was designed by John Whitton in his capacity as Engineer-in-Chief for Railways and built in 1889. It is also known as the Michelago Rail Bridge over Ingalara Creek and the Ingalara Creek Railway Viaduct. The property is owned by RailCorp, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999. [2]

Contents

History

The railway was extended from Queanbeyan to Cooma in 1887-89. At that time, the Engineer-in-Chief for Railways, John Whitton, was under government pressure to reduce construction costs. One common method was to build timber bridges, mostly ballast top timber bream bridges. However, for two major waterways, Ingalara Creek and Bredbo River (Bredbo Rail Bridge) he chose to use Queen post deck trusses, a type of timber truss viaduct that he had already used on the Main North line between Glen Innes and Wallangarra. Nearer to Cooma, at Chakola, he chose a different type of timber viaduct to cross Umaralla Creek. Several of Whitton's other Queen post deck truss bridges - the Beardy Waters, Severn River and Bluff River viaducts and the Tenterfield Creek bridge - are also heritage-listed. [2]

Description

The Michelago Rail Bridge over Ingalara Creek is a six-span timber truss viaduct. Each span is 12 metres (40 ft) centre-to-centre of timber trestles. [2]

The trusses are deck Queen post copied from one of Isambard Kingdom Brunel's Cornish timber bridges, called St Germans viaduct, built about 30 years earlier. [2]

The condition was reported to be fair as at 4 April 2006 due to a lack of maintenance since rail services were suspended. [2]

All these viaducts retain their original fabric. [2]

Heritage listing

The timber Queen post truss viaduct was an economic bridge for the Queanbeyan to Cooma Railway at a time when the boom years of the 1880s were ending and funding for railway construction was decreasing. The Ingalara viaduct is accessible from the Monaro Highway and is an impressive timber structure. The Cooma Railway made a significant contribution to the development of the Monaro Region from the time of its construction 1887-89, and all the timber viaducts were important items of the railway's infrastructure. The timber Queen post deck viaduct was a significant structure in place of the expensive iron lattice bridges preferred by John Whitton. The Ingalara viaduct was technically sound and durable, having been built from renowned ironbark hardwood. The two deck Queen post truss timber viaducts on the Cooma Line, together with four on the Main North Line, are a unique class of railway bridge. [2]

Michelago rail bridge over Ingalara Creek was listed on the New South Wales State Heritage Register on 2 April 1999 having satisfied the following criteria. [2]

The place is important in demonstrating the course, or pattern, of cultural or natural history in New South Wales.

The timber Queen post truss viaduct was an economic bridge for the Quenbeyan to Cooma Railway at a time when the boom years of the 1880s was ending and funding for railway construction was decreasing. [2]

The place is important in demonstrating aesthetic characteristics and/or a high degree of creative or technical achievement in New South Wales.

The viaduct is accessible from the Monaro Highway and is an impressive timber structure. [2]

The place has a strong or special association with a particular community or cultural group in New South Wales for social, cultural or spiritual reasons.

The Cooma Railway made a significant contribution to the development of the Monaro Region from the time of its construction 1887-89, and the three timber viaducts were important items of the railway's infrastructure. [2]

The place has potential to yield information that will contribute to an understanding of the cultural or natural history of New South Wales.

The timber Queen post deck viaduct was a significant structure in place of the expensive iron lattice bridges preferred by John Whitton. The Ingalara viaduct was technically sound and durable, having been built from renowned ironbark hardwood. [2]

The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales.

These two timber viaducts on the Cooma Line, together with four on the Main North Line, are a unique class of railway bridge. [2]

See also

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References

  1. ↑ "GOULBURN TO COOMA RAILWAY EXTENSION". The Sydney Morning Herald (15, 970). New South Wales, Australia. 30 May 1889. p. 4 – via National Library of Australia.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 "Michelago rail bridge over Ingalara Creek". New South Wales State Heritage Register . Office of Environment and Heritage. H01048. Retrieved 2 June 2018.

Bibliography

Attribution

CC-BY-icon-80x15.png This Wikipedia article was originally based on Michelago rail bridge over Ingalara Creek , entry number 01048 in the New South Wales State Heritage Register published by the State of New South Wales and Office of Environment and Heritage 2018 under CC-BY 4.0 licence , accessed on 2 June 2018.

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