|                                                                                    |   |                         |    | Twelve  |   | Three   |   |
|-----------------------------------------------------------------------------------------|--------|------------------------------|---------|--------------|--------|--------------|--------|
|                                                                                    |   |                         |    | Months  |   | Months       |   |
|                                                                                    |   | Year      Ended December 31, |    | Ended        |   | Ended        |   |
|                                                                                    |   | 2003                         |    | 2004         |   | 2005         |   | 2006 |   |   |  2007 |   | 3/31/2008 |   | 3/31/2008 |   |
| EARNINGS                                                                                |   |                    |    |    |   |    |   |    |   |   |   |   |   |   |   |   |   |   |
| Income      Before Income Taxes                                                         |   | $                            | 308,003 |         | $      | 238,226      |   | $ | 202,021 |   | $ | 282,865 |   | $ |  195,613 |   | $ |  161,856 |   | $ | 78,176 |   |
| Fixed      Charges (as below)                                                           |   |                         | 123,721 |         |   | 110,735      |   |   | 118,365 |   |   | 151,874 |   |   |  178,067 |   |   | 187,145 |   |   | 47,886 |   |
| Total      Earnings                                                                     |   | $                            | 431,724 |         | $      | 348,961      |   | $ | 320,386 |   | $ | 434,739 |   | $ | 373,680 |   | $ | 349,001 |   | $ | 126,062 |   |
|                                                                                    |   |                         |    |         |   |         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| FIXED      CHARGES                                                                      |   |                         |    |         |   |         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest      Expense                                                                   |   | $                            | 115,202 |         | $      | 99,135       |   | $ | 106,301 |   | $ | 129,106 |   | $ | 165,405 |   | $ | 177,722 |   | $ | 44,140 |   |
| Credit      for Allowance for Borrowed Funds Used         During Construction |   |                         | 5,319   |         |   | 8,100        |   |   | 8,764 |   |   | 17,668 |   |   |  6,962 |   |   | 3,723 |   |   | 2,321 |   |
| Estimated      Interest Element in Lease Rentals                                        |   |                         | 3,200   |         |   | 3,500        |   |   | 3,300 |   |   | 5,100 |   |   |  5,700 |   |   | 5,700 |   |   | 1,425 |   |
| Total Fixed      Charges                                                                |   | $                            | 123,721 |         | $      | 110,735      |   | $ | 118,365 |   | $ | 151,874 |   | $ |  178,067 |   | $ | 187,145 |   | $ | 47,886 |   |
|                                                                                    |   |                         |    |         |   |         |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Ratio of Earnings to Fixed      Charges                                                 |   |                         | 3.48    |         |   | 3.15         |   |   | 2.70 |   |   | 2.86 |   |   |  2.09 |   |   | 1.86 |   |   | 2.63 |   |