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Compaction under way for Canadian dam raise

CONTRACTS

BLAST DENSIFICATION/explosive compaction (EC) and rapid impact compaction are being used to improve nearly 1M. m 3of tailings for a proposed dam raise at a tailings impoundment in Sudbury, Ontario.

Rapid impact compaction (GE April 04) is being used to improve shallower areas of tailings, less than 10m thick, while EC will treat deeper zones up to 25m deep.

GAIA Contractors, a subsidiary of Golder Associates, is carrying out the EC work and called in Rapid Compact Compactors for the dynamic compaction.

GAIA regional leader for British Columbia Brian Wilson explains:

'Historically an issue with the use of EC has been the lack of improvement that can be practically obtained in the upper 4m to 5m. GAIA's experience with RIC on projects in British Columbia indicated it would be an ideal complement to the EC process and it has been incorporated into our programme for the site.'

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