New visitors’ viewing platform completed at Mundaring Weir

A crane working at Mundaring Weir. Photo: Water Corporation
A crane working at Mundaring Weir. Photo: Water Corporation

THE new visitors’ viewing platform and northern half of the Mundaring Weir walkway opened on Tuesday, signalling an end to a $14 million upgrade on the historic dam.

Modernisation work to cope with climate change involved the refurbishment of the intake tower, pipework and the round house.

Following the upgrade, the Water Corporation is able to draw water from the dam at a lower depth, reducing the need to transfer groundwater or desalinated water into the dam to boost its level in low stream flow years.

SEE TIMELAPSE FOOTAGE OF THE UPGRADE BELOW

A major part of the workload involved the use of a 400-tonne crane to lift a 42-tonne steel pipe into the weir’s intake tower.

Perth-based company Clough carried out the construction work using about 180 local workers.

For the upgrade, the visitors’ walkway across the top of the dam closed and a diversion was made to the Bibbulmun Track.

The diversion will be removed on May 10 and access to the bottom of the weir will reopen the next day.

The Water Corporation found some existing timber panels along the southern half of the dam’s walkway require maintenance.

“This section of the walkway will remain closed until this maintenance work is undertaken,” she said.

“The Water Corporation will provide updates about when this section will be re-opened to the public.”

Built between 1898 and 1901, Mundaring Weir is considered one of Australia’s greatest engineering achievements, with the dam supplying drinking water through the Goldfields Pipeline to more than 100,000 people, from Mundaring to Kalgoorlie.