<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM PLAINS ALL
AMERICAN PIPELINE, L.P. CONSOLIDATED BALANCE SHEET AS OF DECEMBER 31, 1999 AND
CONSOLIDATED STATEMENT OF INCOME FOR THE YEAR ENDED DECEMBER 31, 1999, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0001070423
<NAME> PLAINS ALL AMERICAN PIPELINE, L.P.
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-START> JAN-01-1999
<PERIOD-END> DEC-31-1999
<CASH> 53,768
<SECURITIES> 0
<RECEIVABLES> 508,920
<ALLOWANCES> 0
<INVENTORY> 72,697
<CURRENT-ASSETS> 739,000
<PP&E> 454,878
<DEPRECIATION> 11,581
<TOTAL-ASSETS> 1,223,037
<CURRENT-LIABILITIES> 637,461
<BONDS> 0
0
0
<COMMON> 228,594
<OTHER-SE> (35,621)
<TOTAL-LIABILITY-AND-EQUITY> 1,223,037
<SALES> 4,739,892
<TOTAL-REVENUES> 4,757,307
<CGS> 4,796,018
<TOTAL-COSTS> 4,837,983
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 21,139
<INCOME-PRETAX> (101,815)
<INCOME-TAX> 0
<INCOME-CONTINUING> (101,815)
<DISCONTINUED> 0
<EXTRAORDINARY> (1,545)
<CHANGES> 0
<NET-INCOME> (103,360)
<EPS-BASIC> (3.21)
<EPS-DILUTED> (3.21)
</TABLE>