Operated by

Managing Water Risks and working with local communities in water scarce areas 24 March 2019Jerry Zozo and Hilaire Diarra

Presented by Graham Trusler

Kibali Gold Mine in the DRC

Kibali Gold Mine: Kokiza and Gorumbwa Village

Overview of Water UseContext – Barrick Mines

- Abstraction of water mostly required for gold processing in the

milling section

- Additional water required for reagent mixing at the CIL and

floatation sections

- Natural water inputs include: rainfall, seepage into the mine,

existing streams within mining areas, etc.

- Positive water balance and controlled effluent discharge into the

environment or towards the communities

- Compliance for potential affected community - Monitoring.

- Contamination from mining run-off towards the environment

Kibali Gold Plant

Kibali: Mengu Hill and Underground

Waste Rock Dumps

Kibali: KCD Open Pit

Kibali: Mafu Open Pit

Flood prevention – and water access protection

Aerial photo – KGM Gold Mine, DRC

Surface water catchment – control point, KGM

Flood prevention – and water access protection

Downstream SU9 – with and without flooding scenariosSurface water management plan, KGM

Flood prevention – and water access protection

- Relocation of some local communities exposed to flooding events from mining or

associated operations was required – e.g. Ambarau Hydropowerplant

- Provision for catchment dams as interval retain dam for flooding event

- Community Control and effective drainage of mining discharge away from community

boreholes and households locations

- Regular monitoring of free board of all operational tailings dams

Flood prevention – Tailings dam return

water process - Tailings dam returning water through submersible pumps from the dam pool

- The TSFs for CN containing tailings are plastic lined to restrict groundwater

infiltration

- Penstock system operated with manual rings to regulate flow at the FTSF

- Automatic pumping capacity established at the designed sump – with level

transmitter sensors in the sumps, booster pumps to allow high pumping capacity,

high quantity of retention capacity of the sumps, permanent operators at the station,

etc.)

- Return water dam controlled discharge – only in the event of successive storms and

very close monitoring of water quality preceeds any approved discharge scenario

- Provisional storage (for instance Detox ponds) for process purposes are maintained

within the Metallurgical plant to allow flexibility before any controlled discharge from

the return water dam

Monitoring of water use – and water balance model

FTSF

CTSF - 2 CTSF - 1

Kibali River

Expanded CTSF (future use)

WRDWRDRaw

Water Dam

Process PlantWRD

Catchment Dam

RWD

Pakaka OP

Dust Sup

PCD

KCD OPKombokolo OP

KCD UG

Process Water Dam

WRD

KMS Dam

Mining Offices

CampWTP 1

WTP 3

Plant Offices

STP 1

STP 2

UG STP 3 Paste Plant

Paste Water Dam

Clarifier

SGS

WTP 2

Detox pond

WRD

Gorumbwa

Old

Monitoring of water use – Quarterly inflow/outflow inventory

# Q3-2017 WATER BALANCE INDICATORS

Monthly ABSTRACTION (m3)

Monthly DISCHARGE (m3)

Q3-2017 WATER BALANCE INDICATORS

1 Groundwater to plant against Discharge - FTSF controlled)

130492.04 0 Discharge - FTSF (Controlled)

2 Dams 55911 55911

3 River/Dam water flow to Plant against Kibali Discharge - pits+UG)

357507.8 1105187.6

Discharge - pits+UG

4

Total Borehole water abstracted against Wastewater or sewage effluent)

39846 13176.7574 Wastewater Treatment (Sewage effluent)

5 Total water abstracted against Total mining Dewatering

583 756.9 1 308 078.2 Total Dewatering (mining)

MINE WATER BALANCE TREND Positive

44.6 % of water discharged is exceeding the total

abstraction in Q3 -2017

Monitoring of water use – weekly water balance within the process plant and return efficiency

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Water recycled in the process plant -2018

Plant Water useEfficiency 2018

Randgold Targets

Current YTDaverage

Same YTD in 2017

3% improved efficiency of plant return water from 71.5% in 2017 to 74.7% in 2018

Detailed water interaction from the process plant –weekly manifest from daily readings of flowmeters –Week 11 in 2019

- Regular engagement with community leaders regarding sustainable development of their

villages

- 165 local artisans from the surrounding villages received training on waste management

and pollution prevention

- Monthly meetings or forums with community delegates to assess the issues and needs

for urgent actions of development within the KGM community hall

- Partnership within community in agribusiness skills and also 132 community members

were trained for mechanic, carpenter, tailor and welding courses.

Training of local village committees

Local Economic Development

Trainings of local villages committees

- Level of education within the community is being leveraged by a strong empowerment

program for youth and children

- 20 high school scholarships for study in the capital city are awarded to best students on

an annual basis

- One master degree scholarship will be given to a local student for research on Rhino re-

introduction in the neighboring Garamba national Park

- Around some 67 primary and secondary schools were built in the surrounding villages

during the relocation period.

- 2 libraries and a university were renovated and supported financially

End of presentation.