<ARTICLE> UT
<CIK> 0000100122
<NAME> TUCSON ELECTRIC POWER COMPANY
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,905,572
<OTHER-PROPERTY-AND-INVEST>                     80,272
<TOTAL-CURRENT-ASSETS>                         254,714
<TOTAL-DEFERRED-CHARGES>                       300,717
<OTHER-ASSETS>                                  70,132
<TOTAL-ASSETS>                               2,611,407
<COMMON>                                       640,644
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                          (403,315)
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 237,329
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<LONG-TERM-DEBT-NET>                         1,136,320
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   48,603
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                    867,302
<LEASES-CURRENT>                                18,444
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 303,409
<TOT-CAPITALIZATION-AND-LIAB>                2,611,407
<GROSS-OPERATING-REVENUE>                      350,619
<INCOME-TAX-EXPENSE>                             1,399
<OTHER-OPERATING-EXPENSES>                     292,795
<TOTAL-OPERATING-EXPENSES>                     294,194
<OPERATING-INCOME-LOSS>                         56,425
<OTHER-INCOME-NET>                               6,558
<INCOME-BEFORE-INTEREST-EXPEN>                  62,983
<TOTAL-INTEREST-EXPENSE>                        55,948
<NET-INCOME>                                     7,035
<PREFERRED-STOCK-DIVIDENDS>                          0
<EARNINGS-AVAILABLE-FOR-COMM>                    7,035
<COMMON-STOCK-DIVIDENDS>                             0
<TOTAL-INTEREST-ON-BONDS>                            0
<CASH-FLOW-OPERATIONS>                          31,296
<EPS-BASIC>                                        0
<EPS-DILUTED>                                        0