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January 2012 Capital Investment - National Grid

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Exhibit ___ (EIOP-19)Page 77 of 684IV. Distribution SystemThe Company’s distribution system comprises lines and substations typically operatingat 15kV and below. There are nearly 36,000 miles of overhead primary wire and nearly7,500 miles of underground primary cable on the system supplying approximately412,774 overhead, padmount and underground transformers. Additionally, there arealmost 424 substations providing service to the Company’s 1.6 million electriccustomers. 1 The current five-year plan for distribution is represented in Table IV-1.Table IV-1Distribution System <strong>Capital</strong> Expenditure by Spending Rationale ($millions)Rationale FY13 FY14 FY15 FY16 FY17 TotalStatutory orRegulatory141.1 137.6 135.1 139.8 143.3 697.0Damage/Failure 25.9 26.1 26.4 26.7 27.5 132.6System Capacityand Performance43.1 52.1 53.4 55.3 56.2 260.1Asset Condition 29.2 34.5 44.3 47.8 49.8 205.7Non-Infrastructure4.7 4.7 5.8 5.3 5.1 25.7Total 244.0 255.0 265.0 275.0 282.0 1321.01 The distribution system data was taken December 6, 2011 from <strong>National</strong> <strong>Grid</strong> Asset InformationWebsite located at http://usinfonet/sites/asset_info/Pages/AssetStatistics.aspx.IV-1 178

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