Prepared by Richard Musselman Operations Support Engineer Round Mountain Gold Corporation

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Prepared by

Richard MusselmanOperations Support EngineerRound Mountain Gold Corporation

Using Trimble 4D Control for High Wall Monitoring at Round Mountain Gold Corporation

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Round Mountain, NV, USA

Kettle River – BuckhornRepublic, WA, USA

Dvoinoye, RussiaKupol, RussiaFort Knox

Fairbanks, AK, USA

Tasiast, Mauritania

Lobo-Marte, ChileLa Coipa, Chile

Maricunga, Chile

Fruta del Norte, Ecuador

Chirano, Ghana

Paracatu, Brazil

KCorporate Offices

Toronto, ON, Canada

Kinross Gold

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Round Mountain Gold Corporation

• Joint Venture with Barrick Gold Corporation (50:50)

• Conventional Open Pit Mining

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Purpose of Slope Monitoring

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NE Highwall–T1/T2 FailureLooking Northeast

Looking Northeast

“Slip Face”

Round MtnPrior to Pit Expansion

Mining

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South Ramp Failure

South Haul Road

Back Break Structure

Alluvial Failure

Rock Failure

Toe HeaveLooking Southeast

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Damage to South Haul Road

Looking Southeast

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Solution

• 2 - Trimble S8 1” Robotic, DR HP, Long Range Instruments• 6 – Trimble NetR9 Ti-1 Reference Stations• 1 –Trimble 4D Control Software v3.0 with various licenses (Upgraded to

v4.1 in March 2013)

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Monitoring Strategy

Control Application ReportsWeb Based ReportsReport Generator ApplicationThreshold Alerts

Customized Accessto Database Tables

PostProcessing

WirelessMine

Network

TrimbleSQL ServerDatabase

TrimbleData

StorageServer

Trimble 4D Control Server•Post Processing•RTK•Terrestrial

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Mobile Slope Monitoring Station

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Monitoring Strategy–Field Configuration

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Trimble 4D Control Software

Terrestrial Displacement Chart

GNSS Scatter Plot

13http://rmo-sql-02/t3dweb

Web Interface Functionality

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Before After

Average Amplitude 0.70 ft 0.13 ft

Measurements/day/prism 4 11

Historical Data Integration

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Why is slope monitoring valuable?

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3 electric shovels14 haul trucks

Protect Property?

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Maintain Production?

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Putting People First

Rigorous Financial Discipline High Performance Culture

Outstanding Corporate Responsibility