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Lumwana Water Management Systems

Dam holding capacity

568 trillion litres

Water storage facility capacity

Year 1

12 GL

Year 6 onwards

569 GL

Pumping rate

500m³ / hr per station.

TSF process water contribution

70% over the life of the mine

Diversion channel

Upstream

35m base width, 0.1% slope

Downstream

15m deep, 10m base width, 0.2% slope

Water course management

Minimum environmental flow

0.15m³ / sec

Discharge to the Lumwana East River

0.08m³ / sec, increasing to 0.26m³ / sec

Minimum Chimiwungo Stream flow

> 0.1m³ / sec

Tailings and water storage costs

Pre-production

$18.7m

Total

$62.6m

Estimated rehabilitation costs for tailings dam

$5.3m

Tailings and water dam construction began

Fourth quarter 2005

Mine construction began

2006

Raw water extraction system commissioned

May 2008

Water storage facility achieves maximum capacity

2014/15

Mine owners

Equinox Minerals

Dam / water management contractors

Knight Piésold

Mine front end engineering

GRD Minproc

Mine EPC contractor

Ausenco International/Bateman Minerals and Metals of South Africa JV
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