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Evolution Ownership
100%

Location
350km west of  Sydney, Australia
40km north-east of West Wyalong
Located on the traditional lands of the Wiradjuri People

Local Communities
Bland, Lachlan and Forbes shires

Year commenced operations
Mining commenced 2005
Processing commenced 2006

History

  • 1980s: Exploration by North Ltd defines E41 and E42 deposits
  • 1991: E46 deposit first delineated
  • 1995: E42 Feasibility Study
  • 2000: North Ltd acquired by Rio Tinto
  • 2001: Homestake acquires 100% interest in the Cowal project from North Gold, a subsidiary of Rio Tinto
  • 2001: Barrick Gold Corporation acquires the Cowal project through a merger with Homestake Mining Company
  • 2005: Mining of the E42 deposit commenced by conventional open-pit methods (truck and shovel)
  • 2006: Processing commenced third quarter of 2006
  • 2015: Evolution acquires 100% interest in the Cowal project from Barrick Gold Corporation

Style of mineralisation
Structurally hosted (epithermal to mesothermal) sheeted veins and shear hosted lode

Contained metals
Gold

Measured, Indicated and Inferred Resources (at 31 Dec 2016)
177.65Mt at 0.88g/t gold for 5.04Moz gold

Ore Reserves (as at 31 Dec 2016)
116.71Mt at 0.85g/t gold for 3.20Moz gold

Mining Method
Conventional load and haul, drill and blast open-pit operation

Gold Production
CY2006: 122,000 ounces
CY2007: 240,000 ounces
CY2008: 191,000 ounces
CY2009: 233,000 ounces
CY2010: 298,000 ounces
CY2011: 269,000 ounces
CY2012: 268,000 ounces
CY2013: 297,000 ounces
FY2013: 314,000 ounces
FY2014: 270,000 ounces
FY2015: 277,000 ounces
FY2016: 238,000 ounces
FY2017: 263,000 ounces

Processing Method
Crushing, two stage grinding, sulphide flotation, regrind, CIL recovery

Nominal treatment rate
7.5Mtpa

Geology
The deposit is hosted by a sequence of Ordovician volcanic rocks. These volcanics are located on a major structural zone and form part of a belt of intermediate to mafic volcanic and granitic rocks that extend from Temora in the south to Peak Hill in the north

Mining
The Cowal operation is an open pit mining operation with production from a number of different faces within the single pit. Mining is carried out with a company-owned fleet of mining equipment. Pit benches are 9m in height mined as 3 x 3m flitches. Ore is hauled by truck from the pit face to either a stockpile area or directly fed into the primary crusher

Processing
The Cowal processing plant was commissioned in May 2006 and consists of crushing, two stage grinding, sulphide flotation, regrind, CIL recovery. The plant currently processes 7.5 Mtpa.

At 30 June 2016 approximately 2.7 million ounces of gold had been produced at Cowal

Environmental Permit
Please see tabbed section below

Cowal operations are ISO14001 certified for Mining and Ore Processing Operations and Support Services for Gold and Silver production

Fact Sheet
Cowal fact sheet – updated May 2017

Cowal corporate video

Environmental management plans

Environmental Management Plans

Air Quality management planHeritage management plan
Air Quality management planHeritage management plan
Blast management planIndigenous Archaeology and Cultural Heritage management plan
Blast management plan (Jan 2015)Indigenous Archaeology and Cultural Heritage management plan
Biodiversity offset management planLand management plan
Biodiviersity offset management plan (May 2015)Land management plan
Compensatory wetland management planLand management plan addendum (May 2015)
Compensatory wetland management planNoise management plan
Cyanide management planNoise management plan (Nov 2014)
Cyanide management plan (Jan 2006)Mine operations - surface water, groundwater, meteorological and biological monitoring program
Cyanide management plan addendum (Aug 2007)Mine operations - SWGMBMP (May 2015)
Cyanide management plan addendum (June 2008)Monitoring program for LPB
Cyanide management plan addendum (Oct 2009)Monitoring program for LPB
Cyanide management plan addendum (July 2010)Rehabilitation management plan
Emergency response planRehabilitation management plan (April 2015)
Emergency response planSoil stripping management plan
Environmental management strategySoil stripping management plan (Feb 2015)
Environmental management strategyTransport of hazardous materials study
Erosion and sediment control planTransport of hazardous materials study (THMS) (Jan 2006)
Erosion and sediment control management planTransport of hazardous materials study annexure (Feb 2007)
Erosion and sediment control management plan addendum (Sept 2004)THMS addendum (sodium cyanide) (June 2010)
Erosion and sediment control management plan addendum (Dec 2009)THMS Addendum (Hydrogen Peroxide) (Aug 2010)
Erosion and sediment control management plan addendum (Feb 2015)THMS Addendum (Sodium Cyanide) (Nov 2010)
Flora and fauna management planTHMS Addendum (Sodium Cyanide) (Mar 2017)
Flora and fauna management plan (May 2015)Water management plan
Hazardous waste and chemical management planWater management plan (May 2015)
Hazardous waste and chemical management plan (May 2011)
Environmental monitoring data

Environmental Monitoring

Protection of the Environment Operations (POEO) Act 

2017 — Monitoring Data (PDF 1MB)

2016 — Monitoring Data (PDF 2 MB)

2015Monitoring Data (PDF 259 KB)

2014Monitoring Data (PDF 463 KB)

2013Monitoring Data (PDF 2MB)

2012Monitoring Data (PDF 882 KB)

Monitoring Locations (PDF 3 MB)

Complaints register

Complaints Register

Schedule 2 of the Development Consent (DA 14/98) includes Condition 9.4(a)(v),which requires that a complaints register, updated on a monthly basis, be made publicly available on the Cowal Gold Project’s website.

2017
| August 2017 | July 2017 | June 2017 | May 2017 | April 2017 | March 2017 |  February 2017  | January 2017

2016
December 2016November 2016 |  October 2016September 2016August 2016July 2016 |  June 2016May 2016April 2016 | March 2016 | February 2016 | January 2016 |

2015
December 2015November 2015October 2015September-2015August-2015  | July-2015June-2015  |  May-2015  |   April-2015  |   March-2015  |   February-2015  |  January-2015

2014
December-2014  |  November-2014  | October-2014 | September-2014  |  August-2014  |  July-2014

Independent monitoring panel

Independent Monitoring Panel

Response Letter to Twelfth Annual Report (1MB)

Twelfth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2016 (PDF 69KB)

Response Letter to Eleventh Annual Report (1MB)

Eleventh Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2015 (PDF 58KB)

Tenth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2014 (PDF 231 KB)

Ninth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2013 (PDF 1 MB)

Eighth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2012 (PDF 201 KB)

Seventh Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2011 (PDF 195 KB)

Sixth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2010 (PDF 3MB)

Fifth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, September 2009 (PDF 61KB)

Fourth Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, October 2008 (PDF 213KB)

Third Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, August 2007 (PDF 1MB)

Second Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, March 2006 (PDF 436KB)

First Annual Report of the Independent Monitoring Panel for the Cowal Gold Project, February 2005 (PDF 206KB)

Historic Site Audit Responses : Pre-Evolution

Response Letter to Ninth Annual Report (2MB)

Response Letter to Eighth Annual Report (3MB)

Response Letter to Seventh Annual Report (2MB)

Response Letter to Sixth Annual Report (565KB)

Response Letter to Fifth Annual Report (937KB)

Response Letter to Fourth Annual Report (1MB)

Response Letter to Third Annual Report (674KB)

Response Letter to Second Annual Report (387KB)

Response Letter to First Annual Report (145KB)