THE FINISHED STRUCTURE: Leslie Dam today.
THE FINISHED STRUCTURE: Leslie Dam today. Jayden Brown

Blast from the past: First stage of Leslie Dam is complete

Extract Warwick Daily News, Tuesday, December 20, 1966

STAGE ONE OF DAM IS NOW COMPLETE

Stage 1 of Leslie Dam is now officially complete, following grouting of the vertical construction joints in the spillway section over the past six weeks.

This was announced from Brisbane yesterday by Mr Allan Taylor, former project engineer at Leslie Dam and now a senior construction engineer with the Irrigation and Water Supply Commission.

Mr Taylor said the work entailed the pumping of a mixture of cement and eater into the vertical construction joints, which were designed in the spillway sections when constructed.

The work was carried out by a gang of six men under engineer Mr J Ready.

Mr Ready has now returned to his former position on the construction staff of Coolmunda Dam near Inglewood, while the six workmen have again taken up duties on the Waruma Dam project, near Eidsvold.

The work was carried out to seal the vertical construction joints, to make provision for the gates, which will be added to the spillway to make up the second stage of the dam's construction at some future date.

The grouting has turned the whole section into a solid mass, with no differential movement between the original sections of the spillway.

Shrinkage in the joints amounted to about 1/16th of an inch although before the grouting was carried out two special water seals - one of rubber and the other of copper - over the contraction joints on the upstream side prevented any water seeping through the wall.

Meanwhile the release of water for irrigation purposes is being maintained at 20 cusecs or approximately 450,000 gallons per hour.

The continued release has resulted in the level of the dam falling to 18 feet five inches below the lip of the spillway.

The water officer, Mr R K Schluter, said yesterday that the Irrigation and Water Supply Commission had delivered a new tractor and six-foot-wide slasher to the dam for use in the conversion of large areas around the dam wall and adjacent picnic area into lawns.

Mr Schluter said the tractor was equipped with a bulldozer blade, and it would also be used for the progressive cleaning up of the construction area to enable lawns to be extended as part of the commission's beautification scheme.

This will involve levelling of ground in front of the wall and cleaning out silted-up stormwater drains.



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