|                                                                                         |   | Year      Ended December 31, |    |         |  Twelve Months      Ended |         |   |  Six Months      Ended |    |
|----------------------------------------------------------------------------------------------|--------|------------------------------|---------|--------------|-------------------------------------|--------------|--------|----------------------------------|---------|
|                                                                                         |   | 2004                         |    | 2005         |                                | 2006         |   | 2007                             |    | 2008 |   |   | 6/30/2009 |   |   | 6/30/2009  |   |
| EARNINGS                                                                                     |   |                    |    |    |                                |    |   |                        |    |    |   |   |   |   |   |   |   |
| Income      Before Income Taxes                                                              |   | $                            | 207,929 |         | $                                   | 199,259      |   | $                                | 286,422 |   | $ | 387,473 |   | $ | 346,869 |   | $ | 350,276 |   | $ | 205,399 |   |
| Fixed      Charges (as below)                                                                |   |                         | 61,742  |         |                                | 63,665       |   |                             | 74,155  |   |   | 86,900 |   |   | 109,245 |   |   | 116,966 |   |   | 52,842 |   |
| Total      Earnings                                                                          |   | $                            | 269,671 |         | $                                   | 262,924      |   | $                                | 360,577 |   | $ | 474,373 |   | $ | 456,114 |   | $ |  467,242 |   | $ | 258,241 |   |
|                                                                                         |   |                         |    |         |                                |         |   |                             |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| FIXED CHARGES                                                                           |   |                         |    |         |                                |         |   |                             |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest      Expense                                                                        |   | $                            | 54,246  |         | $                                   | 59,539       |   | $                                | 66,100  |   | $ | 69,625 |   | $ | 92,068 |   | $ | 97,452 |   | $ | 41,869 |   |
| Credit      for Allowance for Borrowed Funds         Used During      Construction |   |                         | 4,996   |         |                                | 1,526        |   |                             | 5,955   |   |   | 7,275 |   |   | 2,677 |   |   | 5,014 |   |   | 3,723 |   |
| Estimated      Interest Element in Lease Rentals                                             |   |                         | 2,500   |         |                                | 2,600        |   |                             | 2,100   |   |   | 10,000 |   |   |  14,500 |   |   | 14,500 |   |   |  7,250 |   |
| Total Fixed      Charges                                                                     |   | $                            | 61,742  |         | $                                   | 63,665       |   | $                                | 74,155  |   | $ | 86,900 |   | $ | 109,245 |   | $ | 116,966 |   | $ |  52,842 |   |
|                                                                                         |   |                         |    |         |                                |         |   |                             |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Ratio of Earnings to Fixed      Charges                                                      |   |                         | 4.36    |         |                                | 4.12         |   |                             | 4.86    |   |   | 5.45 |   |   | 4.17 |   |   |  3.99 |   |   |  4.88 |   |