Filed by Pacific Energy Partners, L.P.
                           Pursuant to Rule 425 under the Securities Act of 1933
                                        and deemed filed pursuant to Rule 14a-12
                                   under the Securities and Exchange Act of 1934
                                  Subject Company: Pacific Energy Partners, L.P.
                                                   Commission File No. 1-31345

[PACIFIC ENERGY PARTNERS, L.P. LOGO]
 5900 Cherry Avenue
 Long Beach, California 90805
--------------------------------------------------------------------------------

                     Pacific Energy Partners, L.P. Announces
                  Special Unitholder Meeting to Approve Merger

     LONG BEACH, Calif.--(BUSINESS WIRE)--Sept. 29, 2006--Pacific Energy
Partners, L.P. (NYSE:PPX) ("Pacific Energy" or the "Partnership") announced
today that the date for the special meeting of its unitholders has been set for
November 9, 2006. At the meeting, Pacific Energy's unitholders will vote on
whether to approve and adopt the merger agreement and approve the merger between
Pacific Energy and Plains All American Pipeline, L.P. (NYSE:PAA) ("Plains"). The
special meeting will be held at 9:00 a.m., Pacific Standard Time, at the Long
Beach Marriott Hotel, 4700 Airport Plaza Drive, Long Beach, CA 90815.

     Plains' registration statement on Form S-4, including the joint proxy
statement/prospectus for the special meeting, was declared effective by the
Securities and Exchange Commission on September 29, 2006. The joint proxy
statement/prospectus for the meeting is expected to be mailed on or about
October 2, 2006, to Pacific Energy unitholders of record as of the close of
business on September 18, 2006.

     About Pacific Energy:

     Pacific Energy is a master limited partnership headquartered in Long Beach,
California. Pacific Energy is engaged principally in the business of gathering,
transporting, storing and distributing crude oil, refined products and other
related products. Pacific Energy generates revenues by transporting such
commodities on its pipelines, by leasing capacity in its storage facilities and
by providing other terminaling services. Pacific Energy also buys and sells
crude oil, activities that are generally complementary to its crude oil
operations. Pacific Energy conducts its business through two business units, the
West Coast Business Unit, which includes activities in California and the
Philadelphia, PA area, and the Rocky Mountain Business Unit, which includes
activities in five Rocky Mountain states and Alberta, Canada.

     For additional information about the Partnership, please visit
www.PacificEnergy.com.



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     Investor Notice:

     Pacific Energy and Plains have filed a joint proxy statement/prospectus and
other documents with the Securities and Exchange Commission ("SEC") with respect
to the proposed merger of Pacific Energy with and into Plains, which joint proxy
statement/prospectus has been declared effective by the SEC. The definitive
joint proxy statement/prospectus will be sent to security holders of Pacific
Energy and Plains seeking their approval of the merger and related transactions.
Investors and security holders are urged to carefully read the joint proxy
statement/prospectus because it contains important information, including
detailed risk factors, regarding Pacific Energy, Plains and the merger.
Investors and security holders may obtain a free copy of the definitive joint
proxy statement/prospectus and other documents containing information about
Pacific Energy and Plains, without charge, at the SEC's web site at www.sec.gov.
Copies of the definitive joint proxy statement/prospectus and the SEC filings
that are incorporated by reference in the joint proxy statement/prospectus may
also be obtained free of charge by directing a request to Pacific Energy or
Plains. Pacific Energy or Plains and the officers and directors of the
respective general partners of Pacific Energy or Plains may be deemed to be
participants in the solicitation of proxies from their security holders in
connection with the proposed transaction. Information about these persons can be
found in Pacific Energy's or Plains' respective Annual Reports on Form 10-K
filed with the SEC, and additional information about such persons may be
obtained from the joint proxy statement/prospectus.

     CONTACT: Pacific Energy Partners, L.P.
              Jennifer Shigei, 562-728-2871
              562-728-2881 (fax)
              JShigei@PacificEnergy.com













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