Angle Vale Bridge

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Angle Vale Bridge
Angle Vale Bridge South Australia.jpg
Angle Vale Bridge
Coordinates 34°37′50″S138°38′45″E / 34.630677°S 138.645846°E / -34.630677; 138.645846
Carried Motor vehicles
Crossed Gawler River
LocaleHeaslip Road, Angle Vale, South Australia, Australia
Characteristics
Design Deck arch bridge
Material Sandstone timber
Width5 metres (18 ft)
Longest span26 metres (85 ft)
No. of spans1
History
Designer Charles Francis Godfrey Ashwin
Construction end1876 (1876)
Collapsed25 May 2023
Closed1966 (1966)
Official nameAngle Vale Bridge [Laminated Timber Arch]; Old Bridge
TypeREG - Confirmed
Designated24 July 1980
Reference no.13324
Polygon typeB - Building footprint
Subject indexTransport (Road) - Road Bridge
Location
Angle Vale Bridge

Angle Vale Bridge was a laminated timber deck arch bridge erected in 1876 over the Gawler River on Heaslip Road, Angle Vale, South Australia. It was the only surviving bridge of its type in Australia in 2023. [1] The bridge was listed on the South Australian Heritage Register on 24 July 1980. [2] The bridge collapsed on 25 May 2023 as a result of heavy rainfall. [3]

Contents

Description

The bridge consisted of sandstone abutments and wing walls, with four laminated timber arch ribs of 26 metres (85 ft) span, set in cast iron sockets and supporting a timber deck carrying a roadway 5 metres (18 ft) wide. The bridge was opened by the on Wednesday 22 November 1876 by Commissioner of Public Works Hon. J. Colton with Miss Heaslip taking the honour of cutting the ribbon. [4]

History

Laminated timber arch bridges were constructed in Australia on British and American designs from 1853. [5] However, few survived due to the poor preservation of Australian timbers The first bridges of this type in South Australia were built in 1856 using both imported softwood and local hardwood and incorporated horizontally laminated bent timbers bolted at regular intervals. However the arches only had a service life of only 12 to 16 years due to water penetrating between the laminations causing the timber to quickly rot. An improvement was made by laminating the timbers vertically and capping the tops to prevent water ingress. [1]

Tenders were called for erecting the Angle Vale Bridge on Wednesday 2 February 1876 closing on 21 February. The bridge was designed by Charles Francis Godfrey Ashwin C.E., Superintending Surveyor of the Northern District of the South Australia Central Road Board. the construction contract was won by Messrs Hack and Parker, while J.C. Brodie was the Clerk of Works. The bridge was completed in less than nine months and opened on Wednesday 22 November 1876. Ashwin was born in 1816 and appointed draftsman to the Central Road Board in 1855. He was promoted as Surveyor (engineer) on 11 March 1861. He died while returning to England on 29 April 1878. [1]

The bridge was bypassed in 1966, and deteriorated before an extensive restoration program was carried out in 1988. [6]

In 2008, its engineering heritage was recognized by the installation of a marker provided by the Engineers Australia's Engineering Heritage Recognition Program. [7]

On 25 May 2023, only days before a scheduled engineering inspection was to take place, the bridge collapsed into the Gawler river resulting in severe damage. [8] the timbers of the bridge were recovered and an assessment of their condition and the potential restoration carried out. [9]

Comparisons

Only two other early laminated timber arch bridges are known in Australia, the 1873 Old Currency Creek Road Bridge off Goolwa - Strathalbyn Road which has been modified by the installation of riveted iron girders, [10] and the 1863 Sunnyhill Bridge, which was inundated by the flooding of Millbrook Reservoir. [11]

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References

  1. 1 2 3 ANGLE VALE & DISTRICTS PROGRESS ASSOCIATION INC. ANGLE VALE BRIDGE OFFICIAL OPENING GALA DAY COMMEMORATIVE PROGRAMME 1988
  2. "Angle Vale Bridge [Laminated Timber Arch]". South Australian Heritage Register. Department of Environment, Water and Natural Resources. Retrieved 12 June 2016.
  3. https://www.facebook.com/watch?v=1019255909448105
  4. "OPENING OF THE ANGLE VALE BRIDGE OVER THE GAWLER RIVER". South Australian Chronicle and Weekly Mail (Adelaide, SA : 1868 - 1881) . Adelaide, SA: National Library of Australia. 25 November 1876. p. 9. Retrieved 29 July 2015.
  5. playfordspast.blogspot.com
  6. The Conservation of the Angle Vale Laminated Timber Arch Bridge, In: National Conference on Engineering Heritage (4th : 1988 : Sydney, N.S.W). Fourth National Conference on Engineering Heritage 1988: Preprints of Papers. Barton, ACT: Institution of Engineers, Australia, 1988: 42-46. Hawes, J; Legoe, D; Stacy, W; Young, D
  7. "Angle Vale Bridge, Gawler River, 1876-". Engineering Heritage Recognition Program. Engineers Australia. Retrieved 12 June 2016.
  8. INDaily Adelaide, Wednesday, May 31, 2023
  9. Update on Angle Vale Bridge- 31 May 2023 Playford News
  10. South Australian Heritage Register Old Currency Creek Road Bridge Archived March 4, 2016, at the Wayback Machine
  11. Sunnyhill Bridge, State Library of South Australia