Paradise: Why so dam expensive?
Damage repair bill blows out
AS THE first stage of the emergency remedial works to Paradise Dam are completed, questions are being asked as to why it is costing millions.
Following the severe flooding on Australia Day, Sunwater identified significant damage to the spillway energy dissipater and the rock downstream of the dam.
Sunwater chief executive officer Peter Boettcher said the aim of stage one was to treat any scour risks on the dissipater and the rock foundation up to 20m downstream of the dissipater.
“This distance has been assessed as sufficient to deal with the most significant features in the goodnight bedrock formation to provide assurance that the dam will withstand another flood event.” he said.
“Sunwater will now start the next stage to reinstate the dissipater sill wall and mitigate any immediate safety issues, with completed expected in late 2013.”
Stage one cost $6 million while stage two is expected to cost about $17.7 million.
Mr Boettcher said Sunwater would continue to take precautionary measures and undertake intermittent releases to ensure the level of the dam remained 3m below full supply level.
“Once stage two is complete, the third and final stage will involve a comprehensive dam safety review and investigations into whether additional works are required to ensure the dam fully satisfies dam safety regulations,” he said.
Minister for Energy and Water Supply Mark McArdle wants answers as to why repairs for stages one and two would amount to almost $24 million.
“I have asked for a number of reports to determine how such serious damage could have occurred to a dam that was only completed in December 2005,” he said.
“The amount of serious damage needs to be investigated to give the public confidence that these matters are reviewed in an open and transparent way.
“The images of the major construction underway gives some idea of the scale of the damage, which needs to be explained.”
DAMAGE BELOW WALL: Sunwater have completed stage one of remedial works at Paradise Dam following the Australia Day floods.