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PROJECT Chatham Islands quarry management Project sheet - Chatham Islands.docx/ Page 1 of 2 Project name: Chatham Islands quarry management Client: Screenworks Geotech Supervisor: Daniel Skilton Project date: Dec 2015 – July 2017 Project description Geotech were contracted to Southern Screenworks Limited, to establish and operate a quarry on Ohinemama Farm on the Chatham Islands. The quarry was a Greenfields project, for the establishment of a quarry approximately 26,000m 2 in area. The project required: Construction (in conjunction with Screenworks) of a decant pond prior to the start of ground engaging Establishment of a 26,000m 2 quarry with a processing area of around 9,000m 2 Establishment of the site office Construction of an access track through pastoral land to the quarry Set up of stockpile areas for overburden and material Establishment of Geotech explosives magazine Quarry blasting to meet required screensize General quarry management works, production, stockpile management and cartage Explosives management Design for subsequent rehabilitation The quarry was being established to provide concrete aggregate for building concrete x-blocks/breakwater armour for the Chatham Islands wharf upgrade. Resources applied A range of resources were mobilised to the Chathams to support the project, including: Sandvik Ranger 500 top drive surface track drill PC300 excavator HM400 ADT Emulsion unit mounted on unimog Light vehicles Explosives magazine Services A decant structure was constructed prior to any other ground engaging to establish the quarry. This system would manage water runoff from the quarry, and the established early on in the greenfields project. Geotech undertook drill and blast for quarry establishment. Blasts were a modest size (generally limited to around 5000m 3 ) in part due to the lack of space as the quarry was developed, but also to meet the screensize for the Screenworks crusher.

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PROJECTChathamIslandsquarrymanagement

Projectsheet-ChathamIslands.docx/Page1of2

Projectname: ChathamIslandsquarrymanagement

Client: Screenworks

GeotechSupervisor: DanielSkilton

Projectdate: Dec2015–July2017

ProjectdescriptionGeotechwerecontractedtoSouthernScreenworksLimited,toestablishandoperateaquarryonOhinemamaFarmontheChathamIslands.ThequarrywasaGreenfieldsproject,fortheestablishmentofaquarryapproximately26,000m2inarea.Theprojectrequired:

• Construction (in conjunctionwithScreenworks)ofadecantpondpriortothestartofgroundengaging

• Establishment of a 26,000m2 quarrywith a processing area of around9,000m2

• Establishmentofthesiteoffice• Constructionofanaccesstrackthroughpastorallandtothequarry• Setupofstockpileareasforoverburdenandmaterial• EstablishmentofGeotechexplosivesmagazine• Quarryblastingtomeetrequiredscreensize• Generalquarrymanagementworks,production,stockpilemanagement

andcartage• Explosivesmanagement• Designforsubsequentrehabilitation

Thequarrywasbeingestablishedtoprovideconcreteaggregateforbuildingconcretex-blocks/breakwaterarmourfortheChathamIslandswharfupgrade.ResourcesappliedArangeofresourcesweremobilisedtotheChathamstosupporttheproject,including:

• SandvikRanger500topdrivesurfacetrackdrill• PC300excavator• HM400ADT• Emulsionunitmountedonunimog• Lightvehicles• Explosivesmagazine

ServicesAdecantstructurewasconstructedpriortoanyothergroundengagingtoestablishthequarry.Thissystemwouldmanagewaterrunofffromthequarry,andtheestablishedearlyoninthegreenfieldsproject.Geotechundertookdrillandblastforquarryestablishment.Blastswereamodestsize(generallylimitedtoaround5000m3)inpartduetothelackofspaceasthequarrywasdeveloped,butalsotomeetthescreensizefortheScreenworkscrusher.

PROJECTChathamIslandsquarrymanagement

Projectsheet-ChathamIslands.docx/Page2of2

GEOTECHGROUNDENGINEERING7370StateHighway6Charleston,BullerWestCoast,NewZealandwww.geotech.net.nz

Geotechoperatorsassistedwithgeneralquarryworks,stripping,cartage,stockpilemanagementandquarryoperation.Wewerealsotheleadroleinexplosivesmanagement,overseeingthelegislativecomplianceforallblasting,fromexplosivestransportandstorage,magazinemanagement,andblastdesignanddelivery.Projectvalue$497,000todate