Floodgates - Storm surge barrier

Statement of Significance

The Floodgates have cultural heritage significance because:
they form a very important function in protecting the townsite from Bunbury ocean surges caused by storms;
they help ease the fears of residents in flood prone areas of possible devastation following severe climatic disturbances, particularly from the northerly aspect.

Physical Description

The Bunbury Harbour Floodgates are a concrete and steel structure involving a set of mechanical gates placed across the face of the Inlet, which automatically monitor water levels, particularly when northerly climatic conditions threaten flooding to low-lying areas of East Bunbury.

History

Silting of Bunbury Harbour was an ongoing problem for many years. In 1951, a “plug” was constructed to stop up the natural opening of Leschenault Estaury.

Silting persisted and plans were made for a man-made cut into the lower reaches of the Estuary. Severe flooding in 1964 heightened the debate on whether the plug should be removed, and if there was need for floodgates.

The decision was made in the favour of floodgates following the devastation caused by Cyclone Alby in 1978. The floodgates were completed in 1980 to combat the vulnerability of low lying areas during periods of severe climatic disturbance.

The gates are monitored by the Department of Water, with contingency for closure by manual backup if necessary.

Integrity/Authenticity

High degree of integrity (original intent clear, current use compatible, high long term sustainability).
High degree of authenticity with much original fabric remaining.
(These statements based on street survey only).
The Floodgates are monitored and continue in their original purpose to provide protection from stormwaters for Bunbury residents.

Condition

Condition assessed as good (assessed from streetscape survey only).

Uses

Historic Themes

Creation Date

Publish place record online (inHerit):

Last Update

Disclaimer

This information is provided voluntarily as a public service. The information provided is made available in good faith and is derived from sources believed to be reliable and accurate. However, the information is provided solely on the basis that readers will be responsible for making their own assessment of the matters discussed herein and are advised to verify all relevant representations, statements and information.