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EXHIBIT A <br /> <br /> Valmont-Broomfield 115kV Transmission Line Rebuild Alternatives <br /> Existing Single Steel H-frame Poles Same Height <br />Characteristic H-frame Poles Pole Alternative Alternative Pole Alternative <br />Height of Poles 52 to 71 feet 62 to 86 feet 61 to 80 feet 52 to 71 feet <br />Above Ground <br />Level <br />Number of Poles Add 11 Poles No Additional No Additional Add 22 Poles <br /> Poles Poles <br />Normal Loading 61/52,MVA 73/65 MVA 73/65 MVA 73/65 MVA <br />Maximum Loading 135/135 MVA 247/247 MVA 247/247 MVA 247/247 MVA <br />Normal Loading 22.80 center ROW 20.68 center ROW 27.90 center ROW 27.90 center ROW <br />EMF (mG) 7.83/5.74 edge 6.21/3.88 edge 8.56/6.12 edge 8.56/6.12. edge <br /> ROW ROW ROW ROW <br />Maximum Loading 102.03 center 72.48 center ROW 99.16 center ROW 99.16 center ROW <br />EMF (roG) ROW 19.85 edge ROW 21.36 edge ROW 21.36 edge ROW <br /> 29.79 edge ROW <br />Normal Loading 34.3 center ROW 26.8 center ROW 25 center ROW 25 center ROW <br />Noise (dBA) 31.3 edge ROW 24.3 edge ROW 22.6 edge ROW 22.6 edge ROW <br />Maximum Loading 34.3 center ROW 26.8 center ROW 25 center ROW 25 center ROW <br />Noise (dBA) 31.3 edge ROW 24.3 edge ROW 22.6 edge ROW 22.6 edge ROW <br />Cost $2,867,000 * $1,383,000 $2,307,000 $2,053,000 to <br /> $2,287,000 ** <br />O&M Cost $515/mile/year $515/mile/year'"'* $515/mile/¥ear $515/mile/year <br /> <br />* Existing structures would have to be replaced with higher-grade wood poles. <br />** Lower cost is for using single steel poles; higher cost is for using single wood poles. <br />*** Actual cost would be somewhat lower due to maintenance cost reduction for steel poles. <br /> <br /> <br />