<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED FINANCIAL STATEMENTS OF OLD DOMINION ELECTRIC COOPERATIVE AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH CONSOLIDATED FINANCIAL
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PRO-FORMA
<TOTAL-NET-UTILITY-PLANT> 656,946
<OTHER-PROPERTY-AND-INVEST> 274,418
<TOTAL-CURRENT-ASSETS> 89,223
<TOTAL-DEFERRED-CHARGES> 2,834
<OTHER-ASSETS> 18,482
<TOTAL-ASSETS> 1,041,903
<COMMON> 0
<CAPITAL-SURPLUS-PAID-IN> 0
<RETAINED-EARNINGS> 222,600<F1>
<TOTAL-COMMON-STOCKHOLDERS-EQ> 0
0
0
<LONG-TERM-DEBT-NET> 478,495
<SHORT-TERM-NOTES> 0
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 0
<LONG-TERM-DEBT-CURRENT-PORT> 29,700
0
<CAPITAL-LEASE-OBLIGATIONS> 0
<LEASES-CURRENT> 0
<OTHER-ITEMS-CAPITAL-AND-LIAB> 311,108
<TOT-CAPITALIZATION-AND-LIAB> 1,041,903
<GROSS-OPERATING-REVENUE> 307,466
<INCOME-TAX-EXPENSE> 0
<OTHER-OPERATING-EXPENSES> 273,080
<TOTAL-OPERATING-EXPENSES> 273,080
<OPERATING-INCOME-LOSS> 34,386
<OTHER-INCOME-NET> 2,761
<INCOME-BEFORE-INTEREST-EXPEN> 37,147
<TOTAL-INTEREST-EXPENSE> 30,916
<NET-INCOME> 6,231
0
<EARNINGS-AVAILABLE-FOR-COMM> 0
<COMMON-STOCK-DIVIDENDS> 0
<TOTAL-INTEREST-ON-BONDS> 0
<CASH-FLOW-OPERATIONS> 69,092
<EPS-BASIC> 0
<EPS-DILUTED> 0
<FN>
<F1>
OLD DOMINION IS ORGANIZED AND OPERATED AS A COOPERATIVE. PATRONAGE CAPITAL
IS THE RETAINED NET MARGINS OF OLD DOMINION WHICH HAVE BEEN ALLOCATED TO ITS
MEMBERS BASED ON THEIR RESPECTIVE POWER PURCHASES IN ACCORDANCE WITH OLD
DOMINION'S BYLAWS.
</FN>
</TABLE>
