This little bridge nestled is the oldest surviving stone arch bridge on Australia’s mainland. It is the Lennox Bridge, located in the suburb of Blaxland in the lower Blue Mountains. It has also known by the name “The Horseshoe Bridge”.
Designed by David Lennox, the bridge was opened in 1833 and is single arched with a 6 metre span and sits 9 metres above the water level. The road width is 9 metres. The bridge crosses Brookside Creek (or Lapstone Creek) and sits on the road named Mitchell’s Pass which was the main route to the Blue Mountains for 93 years until the Great Western Highway was re-routed across Knapsack Gully via the Knapsack Viaduct. It continued to carry traffic until it was closed in 1967. In the 70s restorations on the bridge took place and it was reopened to traffic in 1982, albeit mostly tourist traffic or locals who know it as a shortcut down the hill to Emu Plains.
The construction of the bridge was done using experienced but largely unskilled convict labour and took 1 year. It is said that the nearby quarry which still exists today was cut specifically to provide stone for the bridge. On the keystone on the south side the designer of the bridge’s name is calved “DAVID LENNOX”. On the north side reads the year in which it was opened “AD 1833”.
NOTE: I try to be as accurate as possible but make no guarantees. Please use this information at your own risk.