<TABLE> <S> <C>

<PAGE>

<ARTICLE> UT

<S>                             <C>                     <C>
<PERIOD-TYPE>                   4-MOS                   8-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1999
<PERIOD-START>                             SEP-01-1999             JAN-01-1999
<PERIOD-END>                               DEC-31-1999             AUG-31-1999
<BOOK-VALUE>                                  PER-BOOK                PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                      283,783                       0
<OTHER-PROPERTY-AND-INVEST>                          0                       0
<TOTAL-CURRENT-ASSETS>                          56,623                       0
<TOTAL-DEFERRED-CHARGES>                         4,646                       0
<OTHER-ASSETS>                                 239,045                       0
<TOTAL-ASSETS>                                 584,097                       0
<COMMON>                                             0                       0
<CAPITAL-SURPLUS-PAID-IN>                      225,667                       0
<RETAINED-EARNINGS>                                229                       0
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 225,896                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<LONG-TERM-DEBT-NET>                           120,000                       0
<SHORT-TERM-NOTES>                              44,009                       0
<LONG-TERM-NOTES-PAYABLE>                      100,000                       0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0                       0
<LONG-TERM-DEBT-CURRENT-PORT>                        0                       0
<PREFERRED-STOCK-CURRENT>                            0                       0
<CAPITAL-LEASE-OBLIGATIONS>                      1,021                       0
<LEASES-CURRENT>                                   646                       0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                  92,475                       0
<TOT-CAPITALIZATION-AND-LIAB>                  584,047                       0
<GROSS-OPERATING-REVENUE>                       54,098                 122,626
<INCOME-TAX-EXPENSE>                             3,406                   3,639
<OTHER-OPERATING-EXPENSES>                      42,830                 107,708
<TOTAL-OPERATING-EXPENSES>                      46,236                 111,347
<OPERATING-INCOME-LOSS>                          7,862                  11,279
<OTHER-INCOME-NET>                                 237                    (20)
<INCOME-BEFORE-INTEREST-EXPEN>                   8,099                  11,259
<TOTAL-INTEREST-EXPENSE>                         5,386                   6,739
<NET-INCOME>                                     2,713                   4,520
<PREFERRED-STOCK-DIVIDENDS>                          0                       0
<EARNINGS-AVAILABLE-FOR-COMM>                    2,713                   4,520
<COMMON-STOCK-DIVIDENDS>                         2,484                   6,255
<TOTAL-INTEREST-ON-BONDS>                        2,844                   5,689
<CASH-FLOW-OPERATIONS>                         (6,891)                  53,533
<EPS-BASIC>                                          0                       0
<EPS-DILUTED>                                        0                       0


</TABLE>