Construction World December 2019

PROJECT INFORMATION

K night Piésold worked closely with Kibali Gold Mine to develop D SXUSRVH EXLOW ORZ LPSDFW DQG FRVW HIIHFWLYH UXQ RI ULYHU hydroelectric project that produces approximately 64 GWh of UHQHZDEOH UHOLDEOH HOHFWULFLW\ HDFK \HDU WR SRZHU WKH PLQH $ SRUWLRQ IURP WKH PLQH̵V SRZHU JULG FDSDFLW\ LV SURYLGHG IUHH WR ORFDO FRPPXQLWLHV UHGXFLQJ WKHLU UHOLDQFH RQ GHIRUHVWDWLRQ IRU HQHUJ\ VXSSO\ 7KH SURMHFW ZLOO XOWLPDWHO\ EHFRPH D OHJDF\ DVVHW IRU ORFDO FRPPXQLWLHV RQFH WKH PLQH KDV UHDFKHG LWV HQG RI OLIH Knight Piésold provided all engineering services up to the VXFFHVVIXO FRPSOHWLRQ RI WKH SURMHFW $ VXPPDU\ RI WKH NH\ LQQRYDWLRQV LQFRUSRUDWHG LQWR WKH SURMHFW FRPSRQHQWV LQFOXGHG • 7KH RYHUDOO SURMHFW FRQFHSW ZDV RSWLPLVHG WR GHOLYHU D ORZ LPSDFW FRQWLQXRXV SRZHU E\ UXQ RI ULYHU RSHUDWLRQ XWLOLVLQJ ORFDO PDWHULDOV ODERXU DQG FRQWUDFWRUV 7KLV LQFOXGHG optimising the location of the diversion weir in order to reduce its height and cost and to allow for the construction of a rubble masonry concrete (RMC) dam that would promote ODERXU LQWHQVLYH FRQVWUXFWLRQ L H ORFDO WUDLQLQJ FRPPXQLW\ LQYROYHPHQW DQG HPSOR\PHQW • The intake structure was designed to facilitate bed load sediment removal by including a forebay sediment trap and vortex desander to provide both continuous sediment removal downstream of the trash rack and a guaranteed continuous HFRORJLFDO ͥRZ UHOHDVH • 7KH KHDGZRUNV ZHUH SRVLWLRQHG RQ WKH OHIW EDQN RI WKH ULYHU ZKLFK KDV JHQWOHU WRSRJUDSK\ DQG D ZHVWHUO\ ULYHU FXUYDWXUH resulting in a shorter length of the power canal to attain the UHTXLUHG KHDG GURS IRU WKH WXUELQH UDWHG FRQGLWLRQV • 7KH P ORQJ 50& GLYHUVLRQ ZHLU ZLWK DGMDFHQW UDGLDO JDWH DOORZV ODUJH ͥRRG GLVFKDUJH FDSDFLW\ 7KH 50& ZHLU construction was selected for its low cost and to allow XQVNLOOHG ODERXU WR EH WUDLQHG DQG ZRUN RQ WKH SURMHFW • 7KH NP ORQJ SRZHU FDQDO ZLWK HPHUJHQF\ VSLOOZD\ ZDV GHVLJQHG IRU WKH UHTXLUHG ͥRZ FDSDFLW\ DQG SRVLWLRQHG RQ WKH primary structure was determined based on the feasibility of the IRXQGDWLRQV 7KH HQWLUH FRQFHSW RI WKH VWUXFWXUH LWV EDVLF IRRWSULQW RYHUDOO QXPEHU RI ͥRRUV DQG */$ ZHUH GLFWDWHG E\ D SURFHVV RI engineering optimisation in conjunction with cost assessment in RUGHU WR GHYHORS D V\VWHP WKDW ZDV IHDVLEOH 2QFH D VROXWLRQ ZDV IRXQG WKDW ZDV YLDEOH $0$ $UFKLWHFWV WRRN WKH HQJLQHHULQJ solution and created from it the beautiful aesthetic statement that FXUUHQWO\ VWDQGV Dolomitic ground is a severe problem from a civil engineering SHUVSHFWLYH &KDQJHV LQ ZDWHU OHYHO LV WKH SULPDU\ FDXVH RI GRORPLWH VLQNKROHV 7KLV LV IUHTXHQWO\ FDXVHG E\ OHDNLQJ VHUYLFHV H[FHVVLYH GHZDWHULQJ DQG QRQ PDLQWDLQHG V\VWHPV 1XPHURXV LQQRYDWLYH WHFKQLTXHV ZHUH LPSOHPHQWHG KHUH • During construction a slope was maintained on all surfaces WR HQVXUH WKDW QR SRQGLQJ RFFXUUHG 7KLV QHHGHG WR ZRUN LQ conjunction with the environmental considerations that no polluted runoff would enter the adjacent lake • Weekly inspections were conducted by a dolomite risk manager to ensure that all dolomitic considerations were being adhered to

• Double sleeved pipes were

• Company entering: AECOM • Client: Growthpoint Properties • Start date: February 2017

used between manholes with ͥRDW VZLWFKHV LQ manholes linked back to the BMS system to trigger a warning in the case of leaks

• End date: March 2019 • Main contractor: :%+2 • Architect: AMA Architects • Principal agent: GladAfrica • Consulting engineer: AECOM • Mechanical engineering, Environmental and Green Star: Aurecon • Earthworks contractor: Stefanutti Stocks

• A subsoil

monitoring system was implemented to ensure that if the municipality VHUYLFHV H[SHULHQFHG OHDNV DQ DOHUW ZRXOG VRXQG RQ WKH %XLOGLQJ Management System (BMS) and the municipality could EH QRWLͤHG ƒ

AZAMBI HYDROPOWER PROJECT The 11 MW Azambi Hydroelectric Project is located in a remote area of the Orientale province in the Democratic Republic of the Congo. The Kibali Gold Mine, a subsidiary of Barrick Gold Corporation, has developed and is operating the project to support the increasing power demands of one of the largest gold mining operations in Africa.

PROJECT INFORMATION construction activity itself allowed a source of income and upliftment and an opportunity to facilitate transfer of skills into WKH ORFDO FRPPXQLW\ Construction methods that would maximise WRSRJUDSK\ VR WKDW LW GLG QRW UHTXLUH DGGLWLRQDO FDQDO OLQLQJ WKHUHE\ UHGXFLQJ FRVWV DQG SURPRWLQJ WKH XVH RI ORFDO PDWHULDOV • $ VXUIDFH SRZHUKRXVH ZDV FRQͤJXUHG IRU WKH WZR KRUL]RQWDO D[LV SLW .DSODQ W\SH WXUELQH JHQHUDWRU XQLWV • 2YHUDOO RSWLPLVDWLRQ RI WKH SURMHFW LQFUHDVHG WKH SURMHFW̵V LQLWLDO DYHUDJH DQQXDO HQHUJ\ HVWLPDWLRQ E\ DSSUR[LPDWHO\ *:K \HDU HTXLYDOHQW WR 86' PLOOLRQ SHU \HDU LQ HQHUJ\ VDYLQJV $]DPEL +36 EHFDPH WKH ͤUVW K\GURSRZHU VWDWLRQ RQ .LEDOL *ROG 0LQH WKDW ZDV DZDUGHG H[FOXVLYHO\ WR &RQJROHVH FRQVWUXFWLRQ HQWHUSULVHV ZLWK WKH PDLQ UROH SOD\HUV FRPSULVLQJ ,QWHU 2ULHQWDO %XLOGHUV 7ULQFR DQG 7RS (QJLQHHULQJ 6HUYLFHV 7KH VRFLDO EHQHͤWV WKDW FRQVWUXFWLRQ RI WKH K\GURSRZHU VFKHPH EURXJKW WR WKH ORFDO UXUDO SRSXODWLRQ RI WKH :DWVD YLOODJH ZHUH integral in the design premise adopted and particularly the weir type ͤQDOO\ DSSOLHG Despite the station becoming a legacy asset to the community LQ WKH ORQJHU WHUP FRPPXQLW\ LQYROYHPHQW GXULQJ WKH VKRUW WHUP

the local labour content were accordingly given SUHIHUHQFH At the peak of FRQVWUXFWLRQ RYHU people were working GLUHFWO\ RQ WKH SURMHFW ZLWK RYHU EHLQJ UHVLGHQWV Safety performance was KLJK DQG QR VHULRXV LQMXULHV ZHUH UHFRUGHG ƒ

• Company entering: Knight Piésold Consulting • Client: Kibali Gold Mine (a JV between %DUULFN *ROG $QJOR*ROG $VKDQWL DQG Sokimo)

• Start date: May 2015 • End date: July 2018

• Main contractor: ,QWHU 2ULHQWDO %XLOGHUV • Consulting engineer: Knight Piésold Consulting

B E S T P R O J E C T S 2019

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