Spencer Street Bridge
Overview
 
The Spencer Street Bridge is a road and tram bridge over the Yarra River
Yarra River
The Yarra River, originally Birrarung, is a river in east-central Victoria, Australia. The lower stretches of the river is where the city of Melbourne was established in 1835 and today Greater Melbourne dominates and influences the landscape of its lower reaches...

 in Melbourne
Melbourne
Melbourne is the capital and most populous city in the state of Victoria, and the second most populous city in Australia. The Melbourne City Centre is the hub of the greater metropolitan area and the Census statistical division—of which "Melbourne" is the common name. As of June 2009, the greater...

, Victoria
Victoria (Australia)
Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. It connects Spencer Street
Spencer Street, Melbourne
Spencer Street is a major street in the central business district of Melbourne, Victoria, Australia. It is named for John Spencer, 3rd Earl Spencer, Chancellor of the Exchequer under Lord Melbourne, the Prime Minister of the United Kingdom....

 on the north bank with Clarendon Street on the south.

During construction engineers knew deep foundation
Deep foundation
A deep foundation is a type of foundation distinguished from shallow foundations by the depth they are embedded into the ground. There are many reasons a geotechnical engineer would recommend a deep foundation over a shallow foundation, but some of the common reasons are very large design loads, a...

s would be required to find bedrock, but at 20 metres below sea level they struck a red gum stump that took three weeks work to remove. It was dated at about 8,000 years old and appears to have lived for well over 400 years.
 
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