January 2012 Capital Investment - National Grid

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Exhibit ___ (EIOP-19)Page 11 of 684Sub-Transmission System SummaryThe sub-transmission system comprises approximately 4,240 miles of lines including:290 miles of 69kV, 365 miles of 46kV, 2,332 miles of 34.5kV, 1,050 miles of 23kV and200 miles of lines below 23kV. Over the five year period covered by this Plan, theCompany expects to invest approximately $271 million on the sub-transmission system,as shown in Table I-5 below.Table I-5Sub-Transmission System Capital Expenditure by Spending Rationale ($millions)Rationale FY13 FY14 FY15 FY16 FY17 TotalStatutory orRegulatory17.6 16.7 15.1 16.5 16.5 82.4Damage/Failure 4.0 3.6 3.8 3.9 4.1 19.5System Capacityand Performance8.2 9.0 9.0 9.7 10.1 46.0Asset Condition 16.1 20.6 26.1 27.9 32.4 123.2Total 46.0 50.0 54.0 58.0 63.0 271.0This five year Plan envisions significant expenditures on the sub-transmission system inthe areas of asset condition and system capacity and performance.Figure I-4Sub-transmission System Mandatory InvestmentSub-Transmission Capital By Spending Rationale(Mandatory Work Solid Color)Statutory orRegulatory30%System Capacity andPerformance17%Non-Infrastructure0%Damage/Failure7%Asset Condition46%I-912
Exhibit ___ (EIOP-19)Page 12 of 684Distribution System SummaryThe 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. 3 The current five year plan for distribution is represented in Table I-6.Table I-6Distribution System Capital 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 1,321.0This Plan envisions the majority of investment in the distribution system will be in theStatutory or Regulatory Requirements spending rationale.Figure I-5Distribution System Mandatory InvestmentDistribution Capital By Spending Rationale(Mandatory Work Solid Color)Statutory orRegulatory52%Non-Infrastructure2%System Capacity andPerformance20%Damage/Failure10%Asset Condition16%3 The distribution system data was taken December 6, 2011 from National Grid Asset InformationWebsite located at http://usinfonet/sites/asset_info/Pages/AssetStatistics.aspx.I-1013
Page 1 and 2: Niagara Mohawk Power Corporationd/b
Page 3 and 4: Testimony of Electric Infrastructur
Page 5 and 6: Exhibit ___ (EIOP-19)Page 2 of 684T
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Page 11 and 12: Exhibit ___ (EIOP-19)Page 8 of 684M
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January 2012 Capital Investment - National Grid

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