|                                                                                                             |   | Year Ended December      31, |    |         | Twelve      Months Ended |         |   | Three      Months Ended  |    |
|------------------------------------------------------------------------------------------------------------------|--------|------------------------------|---------|--------------|--------------------------|--------------|--------|-------------------------------|---------|
|                                                                                                             |   | 2003                         |    | 2004         |                     | 2005         |   | 2006                          |    | 2007 |   |   | 3/31/2008 |   |   | 3/31/2008 |   |
|  EARNINGS                                                                                                   |   |                    |    |    |                     |    |   |                     |    |    |   |   |   |   |   |   |   |
| Income      Before Income Taxes, Minority         Interest Expense      and Equity Earnings  |   | $                            | 142,199 |         | $                        | 127,417      |   | $                             | 114,341 |   | $ | 138,289 |   | $ | 87,333 |   | $ | 77,883 |   | $  | 3,618 |   |
| Fixed      Charges (as below)                                                                                    |   |                         | 67,012  |         |                     | 58,094       |   |                          | 55,808  |   |   | 63,242 |   |   | 79,435 |   |   | 82,894 |   |   | 22,850 |   |
| Total      Earnings                                                                                              |   | $                            | 209,211 |         | $                        | 185,511      |   | $                             | 170,149 |   | $ | 201,531 |   | $ | 166,768 |   | $  | 160,777 |   | $  | 26,468 |   |
|                                                                                                             |   |                         |    |         |                     |         |   |                          |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| FIXED      CHARGES                                                                                               |   |                         |    |         |                     |         |   |                          |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest      Expense                                                                                            |   | $                            | 64,105  |         | $                        | 54,261       |   | $                             | 50,089  |   | $ | 55,213 |   | $ | 60,619 |   | $  | 62,271 |   | $  | 17,142 |   |
| Credit      for Allowance for Borrowed Funds         Used During Construction                     |   |                         | 608     |         |                     | 312          |   |                          | 1,198   |   |   | 2,208 |   |   | 9,795 |   |   | 11,602 |   |   | 3,453 |   |
| Trust      Dividends                                                                                             |   |                         | (201    | )            |                     | (179         | )      |                          | (179    | ) |   | (179 | ) |   | (179 | ) |   | (179 | )  |   | (45 | )  |
| Estimated      Interest Element in Lease Rentals                                                                 |   |                         | 2,500   |         |                     | 3,700        |   |                          | 4,700   |   |   | 6,000 |   |   | 9,200 |   |   | 9,200 |   |   | 2,300 |   |
| Total Fixed      Charges                                                                                         |   | $                            | 67,012  |         | $                        | 58,094       |   | $                             | 55,808  |   | $ | 63,242 |   | $ | 79,435 |   | $  | 82,894 |   | $  | 22,850 |   |
|                                                                                                             |   |                         |    |         |                     |         |   |                          |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Ratio of Earnings to Fixed      Charges                                                                          |   |                         | 3.12    |         |                     | 3.19         |   |                          | 3.04    |   |   | 3.18 |   |   | 2.09 |   |   | 1.93 |   |   | 1.15 |   |