<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>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<BOOK-VALUE> PRO-FORMA
<TOTAL-NET-UTILITY-PLANT> 661,419
<OTHER-PROPERTY-AND-INVEST> 267,772
<TOTAL-CURRENT-ASSETS> 84,293
<TOTAL-DEFERRED-CHARGES> 21,121
<OTHER-ASSETS> 0
<TOTAL-ASSETS> 1,034,605
<COMMON> 0
<CAPITAL-SURPLUS-PAID-IN> 0
<RETAINED-EARNINGS> 220,623<F1>
<TOTAL-COMMON-STOCKHOLDERS-EQ> 0
0
0
<LONG-TERM-DEBT-NET> 477,869
<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> 306,413
<TOT-CAPITALIZATION-AND-LIAB> 1,034,605
<GROSS-OPERATING-REVENUE> 200,234
<INCOME-TAX-EXPENSE> 0
<OTHER-OPERATING-EXPENSES> 176,603
<TOTAL-OPERATING-EXPENSES> 176,603
<OPERATING-INCOME-LOSS> 23,631
<OTHER-INCOME-NET> 1,739
<INCOME-BEFORE-INTEREST-EXPEN> 25,370
<TOTAL-INTEREST-EXPENSE> 21,116
<NET-INCOME> 4,254
0
<EARNINGS-AVAILABLE-FOR-COMM> 0
<COMMON-STOCK-DIVIDENDS> 0
<TOTAL-INTEREST-ON-BONDS> 21,160
<CASH-FLOW-OPERATIONS> 49,797
<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 PURCHASE IN ACCORDANCE
WITH OLD DOMINON'S BYLAWS.
</FN>
</TABLE>
