De Burghs Bridge

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De Burghs Bridge
Coordinates 33°46′32″S151°08′07″E / 33.775659°S 151.135396°E / -33.775659; 151.135396 Coordinates: 33°46′32″S151°08′07″E / 33.775659°S 151.135396°E / -33.775659; 151.135396
CarriesAUS Alphanumeric Route A3.svg Lane Cove Road (A3)
Crosses Lane Cove River
Locale Macquarie Park, Sydney, Australia
Named for Ernest de Burgh
Owner Roads & Maritime Services
Followed by Fullers Bridge
Characteristics
Material Concrete
Total length185 metres (607 ft)
Width29.3 metres (96 ft)
No. of lanes 3 (north); 3 (south)
History
Constructed by Hornibrook
Opened15 December 1967
ReplacesDe Burghs Bridge (first bridge)
Location
De Burghs Bridge

De Burghs Bridge is a road bridge that carries the Lane Cove Road, part of the A3, across the Lane Cove River in Macquarie Park, Sydney, Australia. The bridge stretches from Macquarie Park in the south to West Pymble in the north.

Contents

History

The current De Burghs Bridge is the second bridge with this name to cross the Lane Cove River in this area.

First bridge

Old De Burghs Bridge
De Burghs Bridge 1901.jpg
Opening of old De Burghs Bridge in 1901
Coordinates 33°46′33″S151°08′10″E / 33.775772°S 151.136004°E / -33.775772; 151.136004
Carries Lane Cove Road
Crosses Lane Cove River
Other name(s)Lane Cove Bridge
Named for Ernest de Burgh
Followed by Fullers Bridge
Characteristics
Design Truss bridge
MaterialTimber
Total length90.8 metres (298 ft)
Width5.5 metres (18 ft)
Longest span50 metres (165 ft)
Clearance below 30 metres (100 ft)
History
Designer Ernest de Burgh
Opened22 December 1900
Inaugurated23 February 1901
Collapsed1994 (bushfire)
Closed14 December 1967
ReplacesOlder east/west bridge
Replaced by2nd De Burghs Bridge
Location
De Burghs Bridge
References
[1] [lower-alpha 1]

The first bridge with this name was designed in 1899 by Ernest de Burgh, after whom the bridge is named, and was opened on 23 February 1901. [2] It was situated downstream from the current bridge, within metres at the southern end, and about 20 metres (66 ft) away from the current bridge at the northern end. The single De Burgh timber truss bridge was 91 metres (300 ft) in length, the largest truss was 50 metres (165 ft), the longest timber truss span ever built in Australia. [3] [4]

The old bridge was destroyed by bushfire in January 1994. The northern abutment on the ground is still visible, as are parts of the supporting piers. The new bridge offers a vantage point to view the remnants of the original structure.

Second bridge

The bridge was replaced by two large high-level multi-lane separate concrete bridges, built alongside each other, that opened on 15 December 1967. [2] The current bridge is a six-lane bridge that, unlike the original timber truss, is perpendicular to the river. This demonstrates how far road and bridge building had progressed by the 1960s, as previously it was dictated by the form of the land. One can see how the newer road and bridge is built right over any land formations, in contrast to the winding old road.

De Burghs Bridge is similar in form and function to Roseville Bridge, being a high-level multi-lane bridge replacing a low level, narrow bridge as well as windy approach roads.

De Burghs Bridge is an important part of a significant north–south artery which is the next road between the northern suburbs and the lower northern suburbs after Pennant Hills Road. The bridge carries three lanes of traffic each way and a pedestrian walkway on either side of the bridge. A plaque placed on the bridge pays tribute to the old bridge. It was placed there in 1988 before the destruction of the old bridge. [5]

See also

Notes

  1. ↑ Map shows Pittwater Road continuing past the cemetery and turning west across a bridge over the Lane Cove River.

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References

  1. ↑ Old parish map (Map). 1907.
  2. 1 2 "The New De Burghs Bridge". Main Roads : 51–54. December 1967.
  3. ↑ "Ministerial Visit to Ryde". Sydney Morning Herald . New South Wales, Australia. 25 February 1901. p. 3 – via National Library of Australia.
  4. ↑ "The Lane Cove Bridge and the Field of Mars Tram". Australian Town and Country Journal . LXII (1621). New South Wales. 2 March 1901. p. 23. Retrieved 20 November 2016– via National Library of Australia.
  5. ↑ De Burghs Bridge. Bicentennial Plaque affixed to bridge. De Burghs Bridge. 1988.
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