PLANNING/DESIGN

Route selection and line design in view of visual impact Environmental impact assessment

Obtaining consent (this may include the cost of any delay)

Tests to acquire knowledge of soil and terrain conditions as well as access to the individual tower sites for selecting the type of foundation

PROCUREMENT

Buy land (location of the towers) or the right to access in order to build, maintain and repair the line

Develop purchase and testing specifications Procurement costs

Prequalification and type testing costs

Purchase insulators, fittings, conductors, towers

Purchase ancillary equipment (spacers, warning spheres, night warning devices, etc)

V7.00

Purchase monitoring equipment

Purchase protection/reclosure equipment

CONSTRUCTION

Foundations (separate footing foundations, bored piles, etc) Assembly and erection of towers

Install insulator sets (suspension string, tension strings) and hardware Install conductors

Install ancillary equipment (e.g. spacers, warning spheres, night warning device, real time monitoring, GSM antennas)

Cost of tests after installation (earthing resistance) Cost of protecting the environment during construction Cost of other mitigation measures

Cost of reinstatement

Advanced costs of any future uprating/upgrading/refurbishment

OPERATION

Compensation for restricting land use and other on-going land costs Likely cost of future uprating/upgrading/refurbishment

Cost of maintenance

Cost of planned outage for maintenance Cost of losses

Cost of repair

Cost of outage for repair

END OF LIFE

Remove towers and above-ground equipment Disposal costs minus scrap value

-1-

-1-DIXG:SIGNIFICANTCABLEPROJECTS 1:Overviewofsignificantundergroundcableprojectsconstructedsince1996.Projectsarearrangedinorderofdecreasing andconductorsize VoltageConductorRoutelength Projectname kVmm2 materialInsulation materialNumberof CircuitskmInstallationDate Shinkeiyo-Toyosu5002500CuXLPEDouble39.8Tunnel,Bridge2000 BarajasAirport4002500CuXLPEDouble12.8Tunnel2004 Elstree-StJohnsWood4002500CuXLPESingle20Tunnel2005 Nunthorpe-Newby4002000CuPPL/DDBDouble5.7Directburied2004 kMetropolitanPowerProject4001600CuXLPESingle12.0,9.0Directburied1997 kMetropolitanPowerProject4001600CuXLPESingle12.0Directburied1999 kAarhus-Aalborg4001200AlXLPESingle2.5,4.5& 7.5Directburiedorduct2004 Turbigo-Rho3802000CuXLPEDouble8.4Directburied yBerlinDiagonal3801600CUXLPEDouble6,3and5,2Tunnel1998/2000 dsNieuweWaterwegand Calandkanaalcrossing3801600CuXLPEDouble2.25Directburiedorduct2005 Wienstrom3801200CuXLPEDouble5.2Directburied& tunnels2005 yGoldisthalPumpedStorage380630CUXLPEFour0.4Tunnel2002 Sinbupoung-Seoinchon3452000CuPPLThree17Tunnel2002 Nampusan-Bukpusan3452000CuPPLSingle22Tunnel1998 Nampusan-Bukpusan3452000CuPPLSingle22Tunnel1998 Nampusan-Bukpusan3452000CuPPLSingle22Tunnel2003 Mikeum-Soungdong3452000CuPPLSingle16.7Tunnel1997 Mikeum-Soungdong3452000CuPPLSingle16.7Tunnel1997 Mikeum-Soungdong3452000CuPPLSingle16.7Tunnel2002 Shinyangjai-Shinsoungnam3452000CuPPLDouble9Tunnel2001 Shinyangjai-Shinsoungnam3452000CuPPLDouble9Tunnel2001 Youngseo-Youngdeungpo3452000CuXLPEDouble9.8Tunnel2003 BetheltoNorwalk345/115CuHPFF/XLPEDucts,directburied2006

-2-

-2-VoltageConductorRoutelength yProjectname kVmm2 materialInsulation materialNumberof CircuitskmInstallationDate aliaSydneySouthtoSydney Central3301600CuPPL/DDBSingle28Directburied,ducts, tunnel2004 Shinmeika-Tokai2759400AlGILDouble3.3Tunnel1998 Kawagoe-Nishinagoya2752500CuXLPEDouble14.4Tunnel2002 Jefferson-Martin2301267CuXLPESingle19&19Ducts,directburied2006 eBiançon-Mougins2251600CuXLPESingle8.3Ductbank,trough andtunnel2002 eBiançon-PlandeGrasse2251600CuXLPESingle7.4Ductbank,trough andtunnel2002 eAntibes-Mougins2251200CuHDPEDouble11.3Ductbank1997 eNîmes-Talabot2251200CuXLPESingle4.6Ductbank,trough andtunnel2001 eAvenir-Sausset2251200CuXLPESingle17.9Ductbank,trough andtunnel2001 eMouguerre-Tarnos2251000AlHDPESingle9.4Ductbankand trough1996 oAguaAzul-Alamo2251000CuXLPEDouble5Duct2002 iaRades-Grombalia22251000CuXLPESingle24.7Duct2005 ePont7-Sainneville225800AlXLPESingle4.4Ductbankand trough2002 Sohar2202500CuXLPESingle3.3Directburied2005 dShellybanks2201600CuXLPESingle14Directburied,river crossing1997 Pioltello2201600AlXLPEDouble3+3Directburied2005 TaoDan2201600CuXLPEDouble6.2Directburied2002 anyLubeck-Siems2201200CUXLPEDouble10.2Pipes,directburied2004 enBergshamra2201200AlXLPESingle/Double10.3Tunnel1998 mKoksijde-Slijkens1502000AlXLPESingle30Directburied2006 mTihange-Avernas1502000AlXLPEDouble30Directburied2005 arkKarlsgårde-Blåvand1501200ALXLPESingle35.0Directburied2001 arkTinghøj-Haverslev1501200ALXLPESingle21.0Directburied arkMesballe-Aastrup150800AlXLPESingle27.6Directburiedorduct2000 arkTrige-Aastrup150800AlXLPESingle27.7Directburiedorduct2000 eSARCO150400CuXLPESingle5&11Directburied

-3-

-3-VoltageConductorRoutelength Projectname kVmm2 materialInsulation materialNumberof CircuitskmInstallationDate kRadsted-VantoreStr.1321200AlXLPESingle18.0Directburied+ ducts2002 aCEB1321000CuXLPESingle11.5Ducts,directburied2006 aCEB132800CuXLPESingle14.5Ducts,directburied2006 kRadsted-Rødby132630AlXLPESingle25.0Directburied+ ducts1999 Penrose-Liverpool1101000AlXLPEDouble8.1Tunnel1999 Roskill-Liverpool1101000AlXLPESingle9Directburied1998 Locmalo-Plouay63800AlXLPE19Ductsinsoil Chabossière-Montluc63400AlXLPESingle10.1Ductbank2003

-4-

-4-G2:Overviewofsignificantundergroundcableprojectsconstructedsince1996.Projectsarearrangedinorderofcountryand location VoltageConductorInsulationroutelength yLocationProjectname kVmm2 materialmaterialkmInstallationDate aliaSydneySydneySouthtoSydney Central3301600CuPPL/DDB28Directburied,ducts,tunnel2004 WienstromWienstrom3801200CuXLPE5.2Directburied&tunnels2005 mBelgiancoastKoksijde-Slijkens1502000AlXLPE30Directburied2006 mEastof BrusselsTihange-Avernas1502000AlXLPE30Directburied 2005 arkCopenhagenMetropolitanPowerProject4001600CuXLPE12.0,9.0Directburied1997 arkCopenhagenMetropolitanPowerProject4001600CuXLPE12.0Directburied1999 arkJutlandAarhus-Aalborg4001200AlXLPE2.5,4.5& 7.5Directburiedorduct2004 arkJutlandKarlsgårde-Blåvand1501200ALXLPE35.0Directburied2001 arkJutlandMesballe-Aastrup150800AlXLPE27.6Directburiedorduct2000 arkJutlandTinghøj-Haverslev1501200ALXLPE21.0Directburied arkJutlandTrige-Aastrup150800AlXLPE27.7Directburiedorduct2000 arkLollandRadsted-VantoreStr.1321200AlXLPE18.0Directburied+ducts2002 arkLollandRadsted-Rødby132630AlXLPE25.0Directburied+ducts1999 eAlpes-MaritimesAntibes-Mougins2251200CuHDPE11.3Ductbank1997 eAlpes-MaritimesBiançon-Mougins2251600CuXLPE8.3Ductbank,troughand tunnel2002 eAlpes-MaritimesBiançon-PlandeGrasse2251600CuXLPE7.4Ductbank,troughand tunnel2002 eBrittanyLocmalo-Plouay63800AlXLPE19Ductsinsoil eGardNîmes-Talabot2251200CuXLPE4.6Ductbank,troughand tunnel2001 eIledeFranceAvenir-Sausset2251200CuXLPE17.9Ductbank,troughand tunnel2001 eLoire-AtlantiqueChabossière-Montluc63400AlXLPE10.1Ductbank2003 ePyrénées- AtlantiquesMouguerre-Tarnos2251000AlHDPE9.4Ductbankandtrough1996 eSeine-MaritimePont7-Sainneville225800AlXLPE4.4Ductbankandtrough2002

-5- -5-VoltageConductorInsulationroutelength LocationProjectname kVmm2 materialmaterialkmInstallationDate yBerlinBerlinDiagonal3801600CUXLPE6,3and5,2Tunnel1998/ 2000 ySchleswig- HolsteinLubeck-Siems2201200CUXLPE10.2Pipes,directburied2004 yGoldisthalPumpedStorage380630CUXLPE0.4Tunnel2002 DublinShellybanks2201600CuXLPE14Directburied,river crossing1997 MilanPioltello2201600AlXLPE3+3Directburied2005 MilanTurbigo-Rho3802000CuXLPE8.4Directburied Sardinia-CorsicaSARCO150400CuXLPE5&11Directburied ChubuKawagoe-Nishinagoya2752500CuXLPE14.4Tunnel2002 ChubuShinmeika-Tokai2759400AlGIL3.3Tunnel1998 TokyoShinkeiyo-Toyosu5002500CuXLPE39.8Tunnel,Bridge2000 InchonSinbupoung-Seoinchon3452000CuPPL17Tunnel2002 PusanNampusan-Bukpusan3452000CuPPL22Tunnel1998 PusanNampusan-Bukpusan3452000CuPPL22Tunnel1998 PusanNampusan-Bukpusan3452000CuPPL22Tunnel2003 SeoulMikeum-Soungdong3452000CuPPL16.7Tunnel1997 SeoulMikeum-Soungdong3452000CuPPL16.7Tunnel1997 SeoulMikeum-Soungdong3452000CuPPL16.7Tunnel2002 SeoulShinyangjai-Shinsoungnam3452000CuPPL9Tunnel2001 SeoulShinyangjai-Shinsoungnam3452000CuPPL9Tunnel2001 SeoulYoungseo-Youngdeungpo3452000CuXLPE9.8Tunnel2003 GuadalajaraAguaAzul-Alamo2251000CuXLPE5Duct2002 dsRotterdamNieuweWaterwegand Calandkanaalcrossing3801600CuXLPE2.25Directburiedorduct2005 AucklandPenrose-Liverpool1101000AlXLPE8.1Tunnel1999 AucklandRoskill-Liverpool1101000AlXLPE9Directburied1998 SoharSohar2202500CuXLPE3.3Directburied2005

-6-

-6-VoltageConductorInsulationroutelength yLocationProjectname kVmm2 materialmaterialkmInstallationDate MadridBarajasAirport4002500CuXLPE12.8Tunnel2004 aColomboCEB1321000CuXLPE11.5Ducts,directburied2006 aColomboCEB132800CuXLPE14.5Ducts,directburied2006 enStockholmBergshamra2201200AlXLPE10.3Tunnel1998 iaTunisRades-Grombalia22251000CuXLPE24.7Duct2005 LondonElstree-StJohnsWood4002500CuXLPE20Tunnel2005 TeessideNunthorpe-Newby4002000CuPPL/DDB5.7Directburied2004 NewEnglandBetheltoNorwalk345/115CuHPFFXLPEDucts,directburied2006 SanFranciscoJefferson-Martin2301267CuXLPE19&19Ducts,directburied2006 HoChiMinhCityTaoDan2201600CuXLPE6.2Directburied2002

-7-

-7-3:Indextobriefprojectdescriptions VoltageConductorInsulation CountryProjectname kV(mm2 )materialmaterialInstallationHybrid cable& OHLrouteDate DenmarkAarhus-Aalborg4001200AlXLPEDirectburiedorductYes2004 UKNunthorpe-Newby4002000CuPPL/DDBDirectburiedYes2004 FranceLocmalo-Plouay63800AlXLPEDuctsinsoilNo ItalyTurbigo-Rho3802000CuXLPEDirectburiedYes NetherlandsNieuweWaterweg&Calandkanaal3801600CuXLPEDirectburiedorductYes2005 BelgiumTihange-Avernas1502000AlXLPEDirectburiedYes2003 DenmarkMetropolitanPowerProject4001600CuXLPEDirectburiedNo1997 DenmarkMetropolitanPowerProject4001600CuXLPEDirectburiedyes1999 AustriaWienstrom3801200CuXLPEDirectburied& tunnelsYes2005 KoreaYoungseo-Youngdeungpo3452000CuXLPETunnelNo2003 KoreaYoungseo-Youngdeungpo3452000CuXLPETunnelNo2003 GermanyLubeck-Siems2201200CUXLPEPipes,directburiedNo2004 GermanyBerlinDiagonal3801600CUXLPETunnelNo1998/ 2000 GermanyGoldisthalPumpedStorage380630CUXLPETunnelNo2002 JapanShinkeiyo-Toyosu5002500CuXLPETunnel,BridgeNo2000 JapanKawagoe-Nishinagoya2752500CuXLPETunnelNo2002 JapanShinmeika-Tokai2759400AlGILTunnelNo1998 BelgiumKoksijde-Slijkens1502000AlXLPEDirectburiedNo 2006 ItalyPioltello2201600AlXLPEDirectburiedYes2005 SpainBarajasAirport4002500CuXLPETunnelYes2004 FranceChabossière-Montluc63400AlXLPEDuctbank2003 Italy/FranceSARCO150400CuXLPEDirectburiedNo USABetheltoNorwalk345/115CuHPFF/XLPEDucts,directburiedYes2006 USAJefferson-Martin2301267CuXLPEDucts,directburiedYes2006 TunisiaRades-Grombalia22251000CuXLPEDuct2005

SP 01: Underground cables in the Aarhus-Aalborg 400 kV transmission line (Denmark)