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What river flows under Sydney Harbour Bridge?

June 19, 2025 by MySydneyDetour Leave a Comment

By MySydneyDetour

If you’re planning a trip to Sydney, you’re likely to visit the iconic Sydney Harbour Bridge. This bridge is not only a significant landmark of the city but also a popular tourist attraction. But have you ever wondered what river flows under Sydney Harbour Bridge?

Firstly, let’s clarify that Sydney Harbour is a natural harbor, and technically no rivers run through it. However, a great many rivers flow into the harbor, and thus at times, under the Sydney Harbour Bridge. The main river that flows into Sydney Harbour is the Parramatta River.

Table of Contents

  • The Parramatta River
  • The History of the Parramatta River
  • The Parramatta River Today

The Parramatta River

The Parramatta River

The Parramatta River is a significant river that flows through Sydney’s western suburbs and into Sydney Harbour. It is approximately 23 kilometers long and has a catchment area of 252 square kilometers.

The river is named after the suburb of Parramatta, which is located at its headwaters. It is an estuary, which means that it is a partially enclosed body of water where saltwater from the ocean mixes with freshwater from rivers and streams.

The History of the Parramatta River

History of the Parramatta River

The Parramatta River has a rich history that dates back to the pre-colonial era. The river was an essential source of food and water for the Aboriginal people of the area, who used it for fishing and transportation.

When the British arrived in Sydney in 1788, they established a settlement at Sydney Cove, which is located at the head of Sydney Harbour. The Parramatta River quickly became an important transportation route for the colony, and many of the early settlements were located along its banks.

The river was also a significant source of water for the colony, and in the early days, it was used for washing clothes and bathing. However, as the colony grew, the river became increasingly polluted, and by the 20th century, it was considered one of the most polluted waterways in the world.

The Parramatta River Today

Parramatta River Today

Today, the Parramatta River is still an essential part of Sydney’s landscape, and many people use it for recreational activities such as boating, fishing, and swimming. The river has undergone significant restoration efforts in recent years, and its water quality has improved significantly.

If you’re interested in exploring the Parramatta River, there are many ways to do so.

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