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Wednesday, November 16, 2011

Releases to Lower Wivenhoe Dam to 75 Percent to Commence on Friday 18 November 2011

Gate releases from Wivenhoe Dam will begin late afternoon on Friday 18 November so as not to impact on the permanent restoration works Somerset Regional Council has begun at Savages Crossing.

The releases follow the State Government’s announcement to reduce the Full Supply Level of the dam to 75 per cent. The move is a precautionary measure after the Bureau of Meteorology’s most recent climate outlook pointed toward wetter conditions for the next 3 months. 

An estimated 57,000 megalitres of water will be released at a rate of around 120 cubic metres per second. Seqwater, which owns and operates the dam, says the release pattern will take up to 7 days subject to further rainfall and will affect some local bridges.

Twin Bridges will be closed for the duration of the release. Savages Crossing will be closed initially as a precaution and maybe open again on Saturday morning depending on flows and whether it is safe to do so.

The release rate is not expected to impact Colleges Crossing or provide any noticeable change to water levels in the Brisbane River below Moggill. As a result, Burtons Bridge, Kholo Bridge, Mt Crosby Weir Bridge, Fernvale Bridge and all other Brisbane River bridges and crossings below Moggill are also not expected to be not be impacted by the release.

Seqwater, as part of the Water Grid, is working with local councils regarding the release strategy and the likely impacts which are being managed in accordance with approved flood management plans.

Residents should contact their respective councils for any further information about possible impacts in their local area.