Works on a key section of the Cotter Dam project were placed on emergency hold yesterday after WorkSafe raised fears for the safety of construction staff working on the dam wall.
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Work Safety commissioner Mark McCabe said inspectors would revisit the site today to satisfy themselves an abutment wall was safe before works could resume on that section of the dam.
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''WorkSafe put a prohibition notice on them preventing concrete placement on the right-hand side abutment wall until the integrity of the formwork has been rectified and assured,'' Mr McCabe said.
An Actew Corporation spokesman said Bulk Water Alliance managers would meet WorkSafe inspectors today for a follow-up inspection.
''Safety always has been and will continue to be a key priority on this project, and the Bulk Water Alliance is committed to working with WorkSafe ACT and expects that all these matters will be satisfactorily addressed by [this] morning,'' he said.
He said the issues related to the formwork designed to support a pour of concrete.
''These works are not scheduled to be used for construction for another week to 10 days, therefore will not impact on the schedule.''
The $363million project remains on budget despite rain delays and the discovery of a geological fault at the base of the new dam wall, which took out $10million of the project's contingency budget, and set the project back by several months.
WorkSafe also issued improvement notices at the site, ordering sub-contracting companies to improve safety standards in areas including scaffolding, the use of power leads and formwork.
It came after the authority issued an emergency shutdown order on Boral's Fyshwick plasterboard distribution factory late on Monday.
For months the agency had been working with Boral over fears crumbling asbestos walls in the ageing Fyshwick building were placing workers in danger.
On Friday, WorkSafe conducted independent tests which revealed the presence of asbestos on the factory floor.
The shutdown notice will remain in place until WorkSafe is satisfied the site is clear.
There is no suggestion plasterboards sold from the site are contaminated, Mr McCabe said.